DOC AIRBUS | AMM A320FSATELLITE COMMUNICATION - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The function of the SATCOM system is the reception and processing of signals via satellites providing aeronautical services in the L-Band (1525-1660.5 MHz).
The Aero-I SATCOM system (conformed to ARINC 761) uses an intermediate gain terminal, exploiting the higher power of the Inmarsat 3 satellite. Aero-I allows the aircraft flying within spot beam coverage to transmit and receive multichannel voice, fax and circuit mode data services. Packet mode data services and emergency calls are available world-wide in the global beam.
** ON A/C NOT FOR ALL The function of the SATCOM system is the reception and processing of signals via satellites providing aeronautical services in the L-Band (1525-1660.5 MHz).
General SATCOM System ArchitectureThe Aero-I SATCOM system (conformed to ARINC 761) uses an intermediate gain terminal, exploiting the higher power of the Inmarsat 3 satellite. Aero-I allows the aircraft flying within spot beam coverage to transmit and receive multichannel voice, fax and circuit mode data services. Packet mode data services and emergency calls are available world-wide in the global beam.
2. Component Location
** ON A/C NOT FOR ALL | FIN | FUNCTIONAL DESIGNATION | PANEL | ZONE | ACCESS DOOR | ATA REF |
|---|---|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||||
| 105RV1 | SDU | 88VU | 128 | 23-28-34 | |
| 116RV1 | ANTENNA | 200 | 23-28-00 | ||
3. System Description
A. SATCOM System
The Satellite Data Unit (SDU) is the interface to all other aircraft systems, including the ACARS system. It contains all data processing functions, as well as the modems, channel tuning synthesizers, Hight Stability Reference Oscillator, to/from IF to/from L-band conversion and Hight Power Amplifier (HPA). The SDU also contains a voice CODEC, modem, and synthesizer pair for each the voice channels installed.
The Satellite Data Unit (SDU) is the interface to all other aircraft systems, including the ACARS system. It contains all data processing functions, as well as the modems, channel tuning synthesizers, Hight Stability Reference Oscillator, to/from IF to/from L-band conversion and Hight Power Amplifier (HPA). The SDU also contains a voice CODEC, modem, and synthesizer pair for each the voice channels installed.
B. Intermediate Gain Antenna
The intermediate Gain Antenna (IGA) consists of a 6dBi gain (nominal) electronically steered directional antenna plus an internal LNA/Diplexer.
The intermediate Gain Antenna (IGA) consists of a 6dBi gain (nominal) electronically steered directional antenna plus an internal LNA/Diplexer.
4. Power Supply
The SDU is supplied with 115VAC from the main 115VAC Bus 1 bar (via the sub-busbar 101XP-C).
The SDU is supplied through this circuit breaker:
** ON A/C NOT FOR ALL The SDU is supplied with 115VAC from the main 115VAC Bus 1 bar (via the sub-busbar 101XP-C).
The SDU is supplied through this circuit breaker:
- 102RV
5. Interface
The architecture of the SATCOM interface is shown in figure
The SDU is linked to:
The architecture of the SATCOM interface is shown in figure
The SDU is linked to:
- the Centralized Fault Display System (CFDS) (Ref. 31-32)
- the Landing Gear Control and Interface Units 1 and 2 (LGCIU) (Ref. 32-31)
- the data loader (Ref. 31-38)
- the Air Data/Inertial Reference Units (ADIRU) (Ref. 34-12)
- the Cabin Telecommunications Unit (If installed) (Ref. AMM D/O 23-35-00-00)
- the Multipurpose Control and Display Units 1, 2 and 3 (MCDU) (Ref. 22-82)
- the Flight Warning Computers 1 and 2 (FWC) (Ref. 31-50)
- the Audio Management Unit (AMU) (Ref. 23-50)
- the Air Traffic Service Unit (ATSU) (Ref. 46-21)
A. ATSU (ACARS)-SDU Interface
An ARINC 429 data bus provides communications between the SDU and the ATSU. There are two basic types of communications conducted over these circuits.
The first type is the transfer of messages exchanged with the terrestrial ends of the system.
The second type is the system and maintenance data request and response messages used for command and control. Messages are identifiable when transferred through the use of the GFI field in the file transfer protocol.
The SDU and the ATSU monitor each other's status by exchanging label 270 status words once per second.
An ARINC 429 data bus provides communications between the SDU and the ATSU. There are two basic types of communications conducted over these circuits.
The first type is the transfer of messages exchanged with the terrestrial ends of the system.
The second type is the system and maintenance data request and response messages used for command and control. Messages are identifiable when transferred through the use of the GFI field in the file transfer protocol.
The SDU and the ATSU monitor each other's status by exchanging label 270 status words once per second.
B. ADIRU-SDU Interface
For antenna control steering and computed doppler correction, the following ARINC 429 octal labels are transmitted from the ADIRU to the SDU:
310 Present position - Latitude
311 Present position - Longitude
312 Ground speed
314 True heading
324 Pitch angle
325 Roll angle
361 Inertial altitude
For antenna control steering and computed doppler correction, the following ARINC 429 octal labels are transmitted from the ADIRU to the SDU:
310 Present position - Latitude
311 Present position - Longitude
312 Ground speed
314 True heading
324 Pitch angle
325 Roll angle
361 Inertial altitude
C. Cabin Communications System-SDU Interface
A digital CEPT E1 interface is used between the SDU and the cabin system. The Cabin Communications System (CCS), in conjunction with the Satellite provides cabin services such as telephone, facsimile, and other communication interfaces.
The Cabin Communications Unit (CCU) performs onboard Private Automatic Branch Exchange (PABX) telephony functions that enable the cabin/passenger telecommunications equipment to make the best use of resources provided by the SATCOM.
A digital CEPT E1 interface is used between the SDU and the cabin system. The Cabin Communications System (CCS), in conjunction with the Satellite provides cabin services such as telephone, facsimile, and other communication interfaces.
The Cabin Communications Unit (CCU) performs onboard Private Automatic Branch Exchange (PABX) telephony functions that enable the cabin/passenger telecommunications equipment to make the best use of resources provided by the SATCOM.
D. Data Loader-SDU Interface
An ARINC 429 bus is used to download the data of the Owner Requirement Table (ORT) into the SDU.
An ARINC 429 bus is used to download the data of the Owner Requirement Table (ORT) into the SDU.
E. LGCIU-SDU Interface
The LGCIUs transmit air/ground information discrete outputs to the SDU.
The LGCIUs transmit air/ground information discrete outputs to the SDU.
F. CFDS-SDU Interface
This avionics package includes the AIRBUS BITE function.
This avionics package includes the AIRBUS BITE function.
G. MCDU-SDU Interface
(1) SATCOM MAIN MENU page
The SATCOM MAIN MENU page is used to display call status information and to provide access to lower level pages. If Voice 1 or Voice 2 is not available then the corresponding prompts are blanked. If neither Voice 1 nor Voice 2 is available then this page contains only the SATCOM STATUS prompt.
The SATCOM MAIN MENU page is used to display call status information and to provide access to lower level pages. If Voice 1 or Voice 2 is not available then the corresponding prompts are blanked. If neither Voice 1 nor Voice 2 is available then this page contains only the SATCOM STATUS prompt.
(a) For air-to-ground calls
The phone number mnemonic is displayed adjacent to line key 2L or 4L. It is displayed in large font when a call is established (ANSWERED state), and in small font when the audio line is not currently in use or the call is not established (not in the ANSWERED state). The mnemonic of the selected phone number is displayed unless it is a manual dial, in which case the manual dialed number is displayed.
The phone number mnemonic is displayed adjacent to line key 2L or 4L. It is displayed in large font when a call is established (ANSWERED state), and in small font when the audio line is not currently in use or the call is not established (not in the ANSWERED state). The mnemonic of the selected phone number is displayed unless it is a manual dial, in which case the manual dialed number is displayed.
(b) For ground-to-air calls
GRND-AIR CALL is displayed for the phone number mnemonic in large font when the state indicates the call has been established (GND INIT CALL state), otherwise the phone number mnemonic is displayed in small font (call has not been established). The priority of the call is displayed instead of the call status information. The text to be displayed matches the name of the DIRECTORY category that is associated with this call priority. This text is selectable via the ORT.
GRND-AIR CALL is displayed for the phone number mnemonic in large font when the state indicates the call has been established (GND INIT CALL state), otherwise the phone number mnemonic is displayed in small font (call has not been established). The priority of the call is displayed instead of the call status information. The text to be displayed matches the name of the DIRECTORY category that is associated with this call priority. This text is selectable via the ORT.
(c) The MANUAL DIAL> prompt provides access to the SATCOM MANUAL DIAL page. This prompt is always available.
(d) The <STATUS prompt provides access to the STATUS page, which contains <BITE, LOG> and CONFIGuration information.
(e) The DIRECTORY> prompt provides access to the SATCOM DIRECTORY page.
(a) Present SATCOM System BITE status is displayed adjacent to line key 1L. This line displays:
<BITE OK (using PAGE SELECT color type) if all SATCOM LRUs pass BITE and are active on the bus and all installed channel modules are functional; or
<BITE OK* (using PAGE SELECT color type) if all SATCOM LRUs pass BITE and are active, but not all installed channel modules are functional; or
<BITE FAIL (using the FAULT ANNUNCIATION color type) if one or more LRUs reports a fault or inactivity on the bus.
Only LRUs which are indicated as being installed by the rear connector pins of the SDU are monitored. Selection of line key 1L displays the SATCOM BITE STATUS 1/3 page.
<BITE OK (using PAGE SELECT color type) if all SATCOM LRUs pass BITE and are active on the bus and all installed channel modules are functional; or
<BITE OK* (using PAGE SELECT color type) if all SATCOM LRUs pass BITE and are active, but not all installed channel modules are functional; or
<BITE FAIL (using the FAULT ANNUNCIATION color type) if one or more LRUs reports a fault or inactivity on the bus.
Only LRUs which are indicated as being installed by the rear connector pins of the SDU are monitored. Selection of line key 1L displays the SATCOM BITE STATUS 1/3 page.
(b) Selection of line key 1R displays the SATCOM LOG page.
(c) Selection of line key 2L displays the SATCOM CONFIG page.
(d) Selection of line key 3R determines whether new air-to-ground calls are accepted from the CTU. Calls already in progress are not affected. Selecting line key 3R alternates display between ENABLED* or DISABLED*. The default at power-up is ENABLED*. This prompt (and the title cabin calls) is not displayed if strapping indicates no CTU is installed or if the ORT option CEPT ENABLE* is set to disabled.
(e) Selection of line key 6L when the letters XXXX are in the scratchpad results in display of the SATCOM TEST page.
(3) SATCOM BITE STATUS pages
The three SATCOM BITE STATUS pages provide indication of fault status of SATCOM LRUs. Fault Status is determined according to the criteria for the Fault Summary words to the CFDS.
The three SATCOM BITE STATUS pages provide indication of fault status of SATCOM LRUs. Fault Status is determined according to the criteria for the Fault Summary words to the CFDS.
(a) SATCOM BITE STATUS 1/3 page
Selection of the next page function displays the SATCOM BITE STATUS 2/3 page.
| ---------------------------------------------------------------------- |
| ! SATCOM LRUs ! LRU report line key ! STATUS REPORTED AS: ! |
| ! ! (adjacent to and below) ! ! |
| !---------------!-------------------------!---------------------------! |
| ! System Buses ! 1R ! OK or INACTIVE ! |
| !---------------!-------------------------!---------------------------! |
| ! SRT (SDU) ! 1L ! OK or FAULT ! |
| !---------------!-------------------------!---------------------------! |
| ! IGA LNA ! 3R ! OK, FAULT or NONE ! |
| !---------------!-------------------------!---------------------------! |
| ! Top/Port BSU ! 4L ! OK, FAULT, TEST, INACTIVE ! |
| ! (left) ! ! NO DATA OR NONE ! |
| !---------------!-------------------------!---------------------------! |
| ! Top/Port LNA ! 4R ! OK, FAULT or NONE ! |
| ! (left) ! ! ! |
| !---------------!-------------------------!---------------------------! |
| ! Top/Left HGA ! 5R ! OK, FAULT or NONE ! |
| !---------------!-------------------------!---------------------------! |
| ! IGA ! 5L ! OK, FAULT, INACTIVE, NONE ! |
| ----------------------------------------------------------------------- |
Selection of the next page function displays the SATCOM BITE STATUS 2/3 page.
1 SATCOM SYS BUS pages
The two SATCOM SYS BUS pages provide indication of the bus activity status of LRUs peripheral to the SATCOM system. Bus activities are indicated as OK, INACTIVE, or NONE. OK vs. INACTIVE is determined according to the criteria used for the Fault Summary words to the CFDS.
NONE is shown when the rear connector strapping options indicate a unit is not installed.
The two SATCOM SYS BUS pages provide indication of the bus activity status of LRUs peripheral to the SATCOM system. Bus activities are indicated as OK, INACTIVE, or NONE. OK vs. INACTIVE is determined according to the criteria used for the Fault Summary words to the CFDS.
NONE is shown when the rear connector strapping options indicate a unit is not installed.
a SATCOM SYS BUS 1/2 page
IRS bus status is declared as OK, NO DATA, INACTIVE or NONE.
Selection of next page function key on the MCDU displays the SATCOM SYS BUS 2/2 page.
Selection of 6L returns display to the SATCOM BITE STATUS 1/3 page.
IRS bus status is declared as OK, NO DATA, INACTIVE or NONE.
- OK is indicated if all required IRS data are present on the bus with SSM at NORMAL.
- INACTIVE is indicated according to the requirements for bus activity words to the CFDS.
- NO DATA is indicated if the bus is considered active but not all required data are present with SSM at NORMAL.
- OK vs. INACTIVE is determined according to the criteria used for the summary words to the CFDS.
- LOOP FAIL is displayed only when all of the following conditions are true.
- This SDU is installed in a dual SATCOM configuration (per rear strapping).
- The CMU to SDU bus status is OK.
Selection of next page function key on the MCDU displays the SATCOM SYS BUS 2/2 page.
Selection of 6L returns display to the SATCOM BITE STATUS 1/3 page.
b SATCOM SYS BUS 2/2 page
AC ID indicates NO DATA if no aircraft identifier has been received.
FMC 1 and FMC 2 always display NONE as this interface is not yet supported.
The CPDF activity shown between 2L and 3L indicates OK only if the information labels sent by the SDU are received by the CPDF.
AC ID indicates NO DATA if no aircraft identifier has been received.
FMC 1 and FMC 2 always display NONE as this interface is not yet supported.
The CPDF activity shown between 2L and 3L indicates OK only if the information labels sent by the SDU are received by the CPDF.
(b) SATCOM BITE STATUS 2/3 page
Status of the Starboard (STBD) LNA is displayed adjacent to and below line key 1R. Status is reported as either OK, FAULT or NONE.
Status of the Starboard BSU is displayed adjacent to and below line key 1L. Status is reported as OK, FAULT, TEST, INACTIVE, NO DATA or NONE.
Status of the Starboard HGA is displayed adjacent to and below line key 2R. Status is reported as either OK, FAULT or NONE. Status is reported via the STBD BSU.
The status of the Rear Connector configuration parity is displayed adjacent to and below line key 3L. If parity of pins is odd then OK is reported, otherwise FAULT is displayed.
Status of the High Power Relay is displayed adjacent to and below line key 3R. Status is reported as either OK, FAULT or NONE.
Status of ICAO address is displayed adjacent to and below line key 4L. Status is displayed as INVALID or OK.
Channel Module status is indicated adjacent to and below line key 4R. Selection of line key 4R displays the SATCOM H/W CONFIG page. The line below line key 4R displays the number of functional channel modules and the total number of installed modules.
The currently selected antenna subsystem is displayed adjacent to and below line key 5R. Possible selections displayed are: IGA, STBD HGA, T/P HGA and NONE. NONE is displayed if AES cannot be made operational with either antenna. This could be the result of a detected failure, or of configuration straps that are wired to indicate an illogical combination of available antennas and supported services.
Selection of line key 6L returns display to the SATCOM TITLE page.
Selection of the up arrow key on the MCDU displays the SATCOM BITE STATUS 1/3 page.
Status of the Starboard (STBD) LNA is displayed adjacent to and below line key 1R. Status is reported as either OK, FAULT or NONE.
Status of the Starboard BSU is displayed adjacent to and below line key 1L. Status is reported as OK, FAULT, TEST, INACTIVE, NO DATA or NONE.
Status of the Starboard HGA is displayed adjacent to and below line key 2R. Status is reported as either OK, FAULT or NONE. Status is reported via the STBD BSU.
The status of the Rear Connector configuration parity is displayed adjacent to and below line key 3L. If parity of pins is odd then OK is reported, otherwise FAULT is displayed.
Status of the High Power Relay is displayed adjacent to and below line key 3R. Status is reported as either OK, FAULT or NONE.
Status of ICAO address is displayed adjacent to and below line key 4L. Status is displayed as INVALID or OK.
Channel Module status is indicated adjacent to and below line key 4R. Selection of line key 4R displays the SATCOM H/W CONFIG page. The line below line key 4R displays the number of functional channel modules and the total number of installed modules.
The currently selected antenna subsystem is displayed adjacent to and below line key 5R. Possible selections displayed are: IGA, STBD HGA, T/P HGA and NONE. NONE is displayed if AES cannot be made operational with either antenna. This could be the result of a detected failure, or of configuration straps that are wired to indicate an illogical combination of available antennas and supported services.
Selection of line key 6L returns display to the SATCOM TITLE page.
Selection of the up arrow key on the MCDU displays the SATCOM BITE STATUS 1/3 page.
(c) SATCOM BITE STATUS 3/3 page
Status of the data loaded ORT is reported adjacent to and beneath line key 1L. Valid status messages include:
- Default : No ORT loaded. Default values are used.
- OK : ORT is valid.
- Invalid : ORT must be reloaded.
Status of the SECURE ORT is reported adjacent to and below line key 2L. Valid status messages include NONE, OK and VALID.
Selection of line key 6L returns display to the SATCOM MAIN MENU page.
Selection of the up arrow key on the MCDU displays the SATCOM BITE STATUS 2/3 page.
Status of the data loaded ORT is reported adjacent to and beneath line key 1L. Valid status messages include:
- Default : No ORT loaded. Default values are used.
- OK : ORT is valid.
- Invalid : ORT must be reloaded.
Status of the SECURE ORT is reported adjacent to and below line key 2L. Valid status messages include NONE, OK and VALID.
Selection of line key 6L returns display to the SATCOM MAIN MENU page.
Selection of the up arrow key on the MCDU displays the SATCOM BITE STATUS 2/3 page.
(4) SATCOM CONFIG page
This page provides system configuration information for the SDU.
This page provides system configuration information for the SDU.
(a) Equipment type is displayed adjacent to and above line key 1L.
(b) Selection of line key 1L results in the SECURE ORT page being displayed. Note that this prompt is only available when a SECURE ORT that has at least one secured parameter has been dataloaded into the unit.
(c) Selection of line key 1R results in the SATCOM H/W CONFIG page being displayed.
(d) Part Numbers for SDU software are displayed adjacent to and below line key 2L.
(e) Part Numbers for SDU Owner Requirement Table are displayed adjacent to and below line key 3L. If the Protection Level applied to any of the four data-loadable Owner Requirement Table records is set to Protected/Modifiable and data in any Protected/Modifiable table has been modified, the word MOD is displayed adjacent to the 12-digit Part Number. The second Part Number is a 15 alphanumeric digit free text field. Both Part Number fields are user-definable and may be defined when generating the dataloadable ORT disk.
(f) Aircraft ID is displayed adjacent to line key 4L. A PIN indication following the aircraft ID indicates it is decoded from the configuration pins. A XTALK indication shows the data is extracted from the crosstalk bus.
A BUS indication shows the data is extracted from the 429 ACID bus. If the ACID bus is selected as the source and data has not been received, then dashes are displayed.
A BUS indication shows the data is extracted from the 429 ACID bus. If the ACID bus is selected as the source and data has not been received, then dashes are displayed.
(g) The Protected Level Code and the entry boxes are only available during In-Flight mode and only when the SDU is not Logged On.
(5) SATCOM LOG page
The SATCOM LOG page provides display of AES log-on and control of log-on.
Owner preference and owner requirement tables are accessed via the SATCOM- MAINT menu display. This page may be entered from the MAIN MENU page or from any other page when the active advisory "LOG-ON >" is displayed.
This page provides selection and control of the log-on process.
Sat ID and GES ID and the Log-On select can be entered when in user commanded (manual) log-on mode and in the WAIT USER INPUT state. The log-on status is displayed adjacent to line key 1L. The following status messages are displayed, under the conditions described.
WARMING:
This status is shown under any of the following conditions:
- the SDU is initializing data following a power cycle,
- or the HSR status of the RFU is in the warm-up state,
- or the BSU is reporting self-test.
The SATCOM LOG page provides display of AES log-on and control of log-on.
Owner preference and owner requirement tables are accessed via the SATCOM- MAINT menu display. This page may be entered from the MAIN MENU page or from any other page when the active advisory "LOG-ON >" is displayed.
This page provides selection and control of the log-on process.
Sat ID and GES ID and the Log-On select can be entered when in user commanded (manual) log-on mode and in the WAIT USER INPUT state. The log-on status is displayed adjacent to line key 1L. The following status messages are displayed, under the conditions described.
WARMING:
This status is shown under any of the following conditions:
- the SDU is initializing data following a power cycle,
- or the HSR status of the RFU is in the warm-up state,
- or the BSU is reporting self-test.
| AES ID NOT READY This status is shown if the AES is awaiting a valid |
| Aircraft ID. |
| WAIT USER INPUT This status is shown while the AES is awaiting input from |
| the user and is shown in conjunction with the WAITING |
| inactive advisory. The WAIT USER INPUT state is entered |
| under any of the following conditions: |
| - if at power-up the log-on policy in the owner preference |
| table is USER COMMANDED or |
| - if a user commanded log-on has failed for any reason or |
| - if the AES receives a log-on reject due to a permanent |
| unavailability or |
| - if the user has selected LOG OFF* or ABORT*. |
| When in this state, the Satellite ID and, GES ID options |
| are user enterable. AUTO LOG-ON* is displayed adjacent |
| to line key 5R. MANUAL* is displayed adjacent to line key |
| 6R. The user may manually select a Satellite/GES for a |
| manual log-on or may select AUTO LOG-ON* (5R) which causes |
| the AES to select a GES according to preferences entered in |
| the GES preference table. |
| SELECTING SAT This status is shown while the AES selects a Satellite. |
| TUNING TO SAT This status is shown while the AES tunes to and scans |
| reception from the selected satellite. |
| SELECTING GES This status is shown while the AES selects a GES. |
| TUNING TO GES This status is shown after the selected satellite has |
| been proven acceptable and while the AES tunes to the |
| selected GES. |
| SPOT BEAM SEARCH This status is shown while the SDU is determining the |
| optimal spot beam for use during log-on. |
| SPOT BEAM NOT AVAIL This status is shown if the GES does not support spot |
| beam operation either because it is not transmitting |
| a spot beam map or the GES capabilities broadcast SU |
| indicates that the GES does not support spot beam voice |
| operation. |
| GES NOT AVAIL This status is shown if the AES is in User-Commanded |
| mode and the user selected GES is not referenced in |
| the GES Data Table. |
| SAT NOT AVAIL This status is shown if the AES is in User-Commanded |
| mode and the user selected Satellite cannot be |
| received. |
| UPDATING TABLE This status is shown while the AES is updating system |
| tables. |
| REQUESTING LOG-ON This status is shown after the AES has selected a GES |
| and sent a log-on request. The AES is waiting for a |
| Log-on Confirm (plus any optional P/R/T-channel Control |
| SUs) from the GES. |
| WAITING ACK This status is shown after the AES has received the |
| Log-on Confirm (plus any optional P/R/T-channel Control |
| SUs), and has sent a Log-on Acknowledge to the GES. The |
| AES is waiting for a Log-on Acknowledge from the GES. |
| LOGGED ON This status is shown after the AES has successfully |
| logged onto a GES. While in the LOGGED ON state, the |
| LOG -OFF* action is available. |
| LOGGING OFF This status is shown after the AES has begun the |
| log-off process and before going to the WAIT USER |
| INPUT state. |
| REJECT-TEMPORARY These statuses are shown to indicate the cause of a |
| REJECT-PERMANENT rejected log-on attempt. If the attempt was to a |
| REJECT-INV PARAM manually selected GES, the AES goes to the WAIT USER |
| INPUT state and continually displays the cause. If |
| the attempt was to an automatically selected GES, and |
| the type of reject is permanent, the log-on process |
| continues with the next selected GES and the Failed GES |
| will not be attempted again for 1 hour. If the reject |
| type was temporary or invalid Parameters, the GES may |
| be tried again on ensuing log-on attempts. |
| LOG-ON FAILED This status is shown if log-on to a user selected |
| Satellite/GES has failed and there is no cause code |
| available for display. (e.g. failure is due to signal |
| loss). |
| INVALID CLASS This status is shown if current conditions do not |
| allow any log-on class to be utilized. |
(a) Available user actions for the log-on process are displayed adjacent to line key 6R
| ABORT* This action is displayed adjacent to line key 6R during |
| the search portions of log-on. This action is displayed |
| using the ACTION color type. Selection of line key 6R while |
| ABORT* is displayed results in the AES aborting the search. |
| The AES goes to the WAIT USER INPUT state. |
| LOG-OFF* This action is possible from the REQUESTING LOG-ON |
| WAITING ACK OR LOGGED ON state and is displayed |
| adjacent to line key 6R. This action is displayed using the |
| ACTION color type. Selection of line key 6R while LOG-OFF* |
| is displayed causes the AES to go to the WAIT |
| USER INPUT state. If the AES is in the LOGGED ON |
| state at time of selection, the AES performs a |
| log-off to the GES. |
| MANUAL* This action is displayed while the SDU is in the WAIT |
| USER INPUT state. Selection of line key 6R in this state |
| initiates a manual log-on using the displayed SAT ID, |
| GES ID and antenna selection control. |
(b) Log-on mode is displayed adjacent to line key 5R except when the log-on status is WAIT USER INPUT. Mode is displayed as either AUTO or USER COMMANDED. Log-on mode is initialized per the owner preference table. When Log-on mode is AUTO, the AES selects the most preferred Satellite/GES per the GES preference table.
When the Log-on status is WAIT USER INPUT, AUTO LOG-ON* is displayed using the MANDATORY ACTION color type adjacent to line key 5R. See description of WAIT USER INPUT state above.
When the Log-on status is WAIT USER INPUT, AUTO LOG-ON* is displayed using the MANDATORY ACTION color type adjacent to line key 5R. See description of WAIT USER INPUT state above.
(c) Satellite ID as currently locked onto or being scanned by the SDU, are displayed adjacent to line key 3R. The satellite ID is displayed as the name of the region as listed below. While in the WAIT USER INPUT state a : prompt is displayed and selecting line key 3R cycles through the available satellite regions. This also causes the GES displayed next to line key 4R to be set to the first GES available in that satellite region. Selecting line key 6R (MANUAL*) initiates a manual log-on to the specified Satellite and GES. When in any other state, these numbers are displayed without the : prompt and are not available for user entry.
00 - Atlantic West
01 - Atlantic East
02 - Pacific
03 - Indian
00 - Atlantic West
01 - Atlantic East
02 - Pacific
03 - Indian
(d) GES ID as currently locked onto or being scanned by the SDU, are displayed adjacent to line key 4R. The GES ID is displayed using the textual labels listed below, or represented in octal, range 00-376 is not listed in the table. While the AES is in the TUNING TO SAT portion of the log-on process, the GES ID is displayed as dashes. While in the WAIT USER INPUT state a : prompt is displayed and selecting line key 4R cycles through the available GES IDs within the selected satellite region. Selecting line key 6R (START MANUAL) initiates a manual log-on to the specified Satellite and GES. When in any other state, these numbers are displayed without the : prompt and are not available for user entry.
Atlantic West:
001 - Goonhilly
002 - Southbury
003 - Laurentides
004 - Eik
005 - Aussaguel
Atlantic East:
101 - Goonhilly
103 - Aussaguel
104 - Eik
105 - Fucino
Pacific:
201 - Sentosa
202 - Santa Paula
203 - Yamaguchi
205 - Perth
206 - Niles Canyon
207 - Brunei
210 - Kumsan
Indian:
301 - Eik
302 - Nunthaburi
303 - Aussaguel
305 - Perth
306 - Yamaguchi
307 - Brunei
310 - Sentosa
312 - Fucino
Atlantic West:
001 - Goonhilly
002 - Southbury
003 - Laurentides
004 - Eik
005 - Aussaguel
Atlantic East:
101 - Goonhilly
103 - Aussaguel
104 - Eik
105 - Fucino
Pacific:
201 - Sentosa
202 - Santa Paula
203 - Yamaguchi
205 - Perth
206 - Niles Canyon
207 - Brunei
210 - Kumsan
Indian:
301 - Eik
302 - Nunthaburi
303 - Aussaguel
305 - Perth
306 - Yamaguchi
307 - Brunei
310 - Sentosa
312 - Fucino
(e) Channel number locked onto, or being scanned by the SDU is displayed adjacent to line key 1R. The channel number is a decimal representation, range 8000-19600. This item is not displayed while in the WAIT USER INPUT state. If no valid information is being received, the data field is zero.
(f) Doppler correction in HZ is displayed adjacent to line key 3L. This item is not displayed while in the WAIT USER INPUT state.
(g) Signal Quality is displayed adjacent to and below line key 2L. The display range is 00.0 to 99.9, with typical values being in the range of 10.0 to 60.0. If no P-channel is being received, this field displays 00.0. This item is not displayed while in the WAIT USER INPUT state.
(h) The Beam ID number is a decimal representation, range 0 - 63 as displayed adjacent to line key 2L. This item is not displayed while in the WAIT USER INPUT state.
(i) The number of signal units in error within a 3 minute sliding window of approximately 60k received bits and the number of raw bit errors is displayed adjacent to line key 5L. The raw bit error number is the same as that presented in the BIT Error Rate 429 word. This (these) item(s) is (are) not displayed while in the WAIT USER INPUT state.
NOTE: The active advisory LOG-ON> appears adjacent to line key 6R when the log-on status is WAIT USER INPUT and the MCDU is displaying another page. Selection of line key 6R in those cases displays the SATCOM LOG ON MENU.
(j) Selection of line key 6L returns the MCDU to display the page shown previous to entering the Log-on page.
(6) SATCOM CABIN DISABLE page
This page is displayed upon selection of the Cabin Calls ENABLED prompt in order to disable cabin calls. Selecting CONFIRM* results in any calls being terminated. New telephone calls are not accepted.
This page is displayed upon selection of the Cabin Calls ENABLED prompt in order to disable cabin calls. Selecting CONFIRM* results in any calls being terminated. New telephone calls are not accepted.
(7) SATCOM MANUAL DIAL page
The SATCOM MANUAL DIAL page provides the capability for a phone number to be entered from the scratchpad and then selected for use on one of the cockpit audio line.
The SATCOM MANUAL DIAL page provides the capability for a phone number to be entered from the scratchpad and then selected for use on one of the cockpit audio line.
(a) The phone number is entered (up to 20 characters including any combination of numbers and non alpha (A-Z) characters) in the scratchpad.
The ORT option scratchpad number entry controls whether or not phone numbers geater than 6 digits can be manually dialed.
The ORT option scratchpad number entry controls whether or not phone numbers geater than 6 digits can be manually dialed.
(b) Selection of line key 2L when a phone number is in the scratchpad displays the phone number between the brackets on the 2L line (row 5) (only the first 16 characters of the phone number are displayed).
(c) The currently selected cockpit audio channel is displayed next to line key 4L.
To override the default value, enter the non-default (leading blank characters (spaces) are removed) in the scratchpad and then press line key 4L. To return to the default value, press the CLR function key when the scratchpad is empty and then press line key 4L. If the currently selected cockpit audio channel matches the default value then it is displayed in small font. Otherwise, it is displayed in large font.
To override the default value, enter the non-default (leading blank characters (spaces) are removed) in the scratchpad and then press line key 4L. To return to the default value, press the CLR function key when the scratchpad is empty and then press line key 4L. If the currently selected cockpit audio channel matches the default value then it is displayed in small font. Otherwise, it is displayed in large font.
(d) The Priority is set to NON-SAFETY at power up and on each landing. The Priority is changed by up/down arrow key (keyboard) selection.
(a) This SATCOM DIRECTORY page is displayed when line key 6R is selected from the MAIN MENU.
(b) This page provides access to four phone number lists where some phone numbers have been memorized, according to their priority.
| - EMERGENCY : priority 1 calls reserved for emergency |
| and distress phone number. |
| - SAFETY : priority 2 calls reserved for regulatory |
| and flight safety phone numbers. |
| - NON-SAFETY: priority 3 calls reserved for non |
| flight safety phone numbers. |
| - PUBLIC : priority 4 calls reserved for public |
| phone numbers. |
(c) The names shown are default names. These may be changed via the ORT or via the DIRECTORY INDEX MODIFY page in maintenance mode. The text selected for the category names is also used to display the call priority information on the MANUAL DIAL page and on the SATCOM MAIN MENU page (for GRND-AIR CALLS).
(d) Selection of line keys 1L, 2L, 3L, 4L, causes the display to go to the first Category Numbers page (section 8.8.5) that contains phone numbers associated with the desired call priority.
(e) Selection of <RETURN returns the display to the SATCOM MAIN MENU page.
6. Component Description
A. Satellite Data Unit (SDU)
(1) Description
The SDU conforms to ARINC 600 Specification. Its case size is 8MCU.
The SDU conforms to ARINC 600 Specification. Its case size is 8MCU.
(a) SDU face
There is a TEST pushbutton and six LED annunciators on the front face of the SDU:
There is a TEST pushbutton and six LED annunciators on the front face of the SDU:
- a red SDU FAULT
- a red ANT FAULT
- an amber CHANNEL MODULE
- a green CTU AVAILABLE
- a green LOG ON STATUS
- a green SELF TEST PASS
(b) SDU back
The back comprises a size-two connector including three plugs to enable:
The back comprises a size-two connector including three plugs to enable:
- connection with peripheral circuits (Top Plug-TP and Middle Plug-MP)
- connection with power supply circuits and antenna (Bottom Plug-BP).
(2) Characteristics
The SDU complies with the standards defined in ARINC 761.
Weight : 12.8 Kg (28.1 lbs).
Size : 8 MCU
Power requirement : 115VAC, 400 Hz or 28VDC
Power dissipation : 350 Watts maximum
Operating temperatures : -40 deg.C (-40.00 deg.F) to +70 deg.C (158.00 deg.F)
Operating altitudes : to 55,000 ft. (16763.69 m)
The SDU complies with the standards defined in ARINC 761.
Weight : 12.8 Kg (28.1 lbs).
Size : 8 MCU
Power requirement : 115VAC, 400 Hz or 28VDC
Power dissipation : 350 Watts maximum
Operating temperatures : -40 deg.C (-40.00 deg.F) to +70 deg.C (158.00 deg.F)
Operating altitudes : to 55,000 ft. (16763.69 m)
(3) General operation
The SDU is the heart of the SATCOM system. It interfaces with other onboard avionics such as the aircraft navigation system (ADIRU1, ADIRU2) which provides attitude and position information for antenna pointing purposes and ACARS for data link. It performs most of the data-handling, protocol, modulation/coding and demodulation/decoding functions of the Aircraft Earth Station (AES). It uses a wired aircraft SATCOM address.
The SDU is the heart of the SATCOM system. It interfaces with other onboard avionics such as the aircraft navigation system (ADIRU1, ADIRU2) which provides attitude and position information for antenna pointing purposes and ACARS for data link. It performs most of the data-handling, protocol, modulation/coding and demodulation/decoding functions of the Aircraft Earth Station (AES). It uses a wired aircraft SATCOM address.
B. Antenna
(1) Description
The intermediate gain antenna is top-mounted with an adapter plate on fuselage of aircraft.
The intermediate gain antenna is top-mounted with an adapter plate on fuselage of aircraft.
(a) Antenna connection
The antenna is equipped with three connectors from the SDU.
The antenna is equipped with three connectors from the SDU.
(2) Characteristics
Weight : 10.9 Kg (24.00 lbs).
Operating altitude: up to 50,000 ft. (15239.72 m)
Temperature range: -55 deg.C (-67.00 deg.F) to 70 deg.C (158.00 deg.F).
Receive band: 1530 - 1559 MHz
Transmit band: 1626.5 - 1660.5 MHz
Antenna gain: 6 dBic.
Weight : 10.9 Kg (24.00 lbs).
Operating altitude: up to 50,000 ft. (15239.72 m)
Temperature range: -55 deg.C (-67.00 deg.F) to 70 deg.C (158.00 deg.F).
Receive band: 1530 - 1559 MHz
Transmit band: 1626.5 - 1660.5 MHz
Antenna gain: 6 dBic.
(3) General operation
The intermediate gain antenna is an electronically steerable phased array. Simultaneous transmission and reception of satellite signals (full duplex operation) provides two bands of operation: receive (Rx) band, and transmit (Tx) band.
Beam steering of the antenna is performed via serial transmission of phase shifter data and RF signals from the SDU and reception.
The intermediate gain antenna provides +6 dBic nominal gain with near hemispherical coverage.
The intermediate gain antenna is an electronically steerable phased array. Simultaneous transmission and reception of satellite signals (full duplex operation) provides two bands of operation: receive (Rx) band, and transmit (Tx) band.
Beam steering of the antenna is performed via serial transmission of phase shifter data and RF signals from the SDU and reception.
The intermediate gain antenna provides +6 dBic nominal gain with near hemispherical coverage.
7. Operation/Control and Indicating
A. System Applications
(1) Data communication services
Cockpit data through SATCOM is an extension of the ATSU functionality. Communications using SATCOM rather than VHF3 are automatically selected when VHF3 is not available.
Previously formatted data for SATCOM is transmitted to the ATSU in a series of short bursts or packets.
Cockpit data through SATCOM is an extension of the ATSU functionality. Communications using SATCOM rather than VHF3 are automatically selected when VHF3 is not available.
Previously formatted data for SATCOM is transmitted to the ATSU in a series of short bursts or packets.
(2) Voice communication services
Two channels are dedicated to the cabin (phone or fax).
The airborne telephone cabin system provides civil airline passengers with a direct dial call facility via the international public switched telephone network. The system provides voice services in digital form through the use of voice coding devices called codecs. The codec transmission rate currently used is 9.6 kilobits per second.
As the cockpit has priority over the cabin services, the two channels can be switched from the cabin to the cockpit for flight crew cockpit voice use.
The cockpit voice interface is controlled by the Audio Control Panels (ACP) for the call number selection and by the Flight Warning Computer (FWC) for the display of the associated SATCOM memo/cautions.
Two channels are dedicated to the cabin (phone or fax).
The airborne telephone cabin system provides civil airline passengers with a direct dial call facility via the international public switched telephone network. The system provides voice services in digital form through the use of voice coding devices called codecs. The codec transmission rate currently used is 9.6 kilobits per second.
As the cockpit has priority over the cabin services, the two channels can be switched from the cabin to the cockpit for flight crew cockpit voice use.
The cockpit voice interface is controlled by the Audio Control Panels (ACP) for the call number selection and by the Flight Warning Computer (FWC) for the display of the associated SATCOM memo/cautions.
B. General Operation
(1) RF channel configuration
A set of four RF transmission channels is needed to accommodate the full range of voice and data services. Any given channel can pass information in one direction only. Therefore, for simultaneous two-way communications (Full-Duplex operation), a pair of channels is assigned. A basic description of the four basic channel types is given below:
A set of four RF transmission channels is needed to accommodate the full range of voice and data services. Any given channel can pass information in one direction only. Therefore, for simultaneous two-way communications (Full-Duplex operation), a pair of channels is assigned. A basic description of the four basic channel types is given below:
- P-Channel (Packet-mode channel):
A time-division multiplexed channel is used for ground-to-air signalling, control and data communications. There are two types of P-Channel: Psmc (system management and control) and Pd (data).
A Psmc-Channel is continuously broadcast by each GES to inform users of system status and configuration. It also carries the time and frequency information needed by AES's wishing to log on to the system. Because of its importance for system integrity, the Psmc-Channel has the most robust transmission link design of all the channels.
Pd-Channels are used for signalling and to carry ground-to-air data messages. The system has been designed to support a number of Pd-Channels in anticipation of continuous traffic growth.
Both types of channels, Psmc and Pd, may be combined on a single physical P-Channel.
- R-Channel (Random access channel):
The R-Channel is used for air-to-ground signalling and data communications. As in the case of the P-Channel, there are two types of R-Channel: Rsmc and Rd.
The Rsmc-Channel is used for system signalling functions such as log-on and call requests. The Rd-Channel is used for short duration data transmissions. Again, the system has been designed to support a number of Rd-Channels.
- C-Channel (Circuit-mode channel):
The C-Channel is used to provide full-duplex voice or data communications. Because any given channel can pass traffic in only one direction, C-Channels are assigned in pairs, one for the uplink (ground-to-air) and one for the downlink (air-to-ground). The C-Channel is capable of passing digitized voice at 9.6 kilobits per second (or less) or data at 10.5 kilobits per second (or less).
C-Channels also contain a sub-band data channel which is time-multiplexed with the voice. This sub-band channel operates at approximately 200 bits per second and carries system control and signalling information as well as user data.
- T-Channel (Time division multiple-access channel):
The T-Channel is the air-to-ground data communication channel used for the transmission of longer messages (unlike the R-Channel which is used for short messages). The GES selects a T-Channel and, working on the first come, first served basis, reserves time slots on it as soon as an AES makes a call attempt. The AES then transmits in its reserved time slots.
(2) System operation
(a) Log-on procedure
Log-on is initiated by the SDU after selection of the log on command on the MCDU SATCOM Menu (Ref. para. MCDU-SDU interface). The unit is programmed with two data tables. One called the owner requirement table (ORT), contains information on all GES's in each satellite region and the order of preference in which they are to be selected. The second table, called the system table, contains system management and control information including all GES Psmc and Rsmc Channel frequencies, GES identifications and satellite positions. Each system table also has a version number assigned to it.
The SDU is also programmed with a technical address which is the telephone number of the AES.
When Log-on begins, the SDU receives position and orientation information from the aircraft inertial navigation system and carries out an initial search:
The Psmc-Channel carries an electronic bulletin board which also contains system table information. The AES compares the version number of its system table with that of the one being received from the logged on GES. According to the content of the updated system table, the AES may re-select the satellite at this point. Then, after selection of a Pd frequency, the AES selects a GES according to frequency specified in the ORT or at random from the system table and whether the GES is operating a Pd-Channel in the spot beam where the AES is located. The GES identifies the AES by its technical address and registers the AES as operational in that region. At this point the AES is considered to be logged onto the system.
Log-on is initiated by the SDU after selection of the log on command on the MCDU SATCOM Menu (Ref. para. MCDU-SDU interface). The unit is programmed with two data tables. One called the owner requirement table (ORT), contains information on all GES's in each satellite region and the order of preference in which they are to be selected. The second table, called the system table, contains system management and control information including all GES Psmc and Rsmc Channel frequencies, GES identifications and satellite positions. Each system table also has a version number assigned to it.
The SDU is also programmed with a technical address which is the telephone number of the AES.
When Log-on begins, the SDU receives position and orientation information from the aircraft inertial navigation system and carries out an initial search:
- it tunes to each Psmc Channel according to the preference specified in the ORT,
- the BSU translates azimuth and elevation commands received from the SDU in ARINC 429 digital format into signals needed to select antenna elements.
The combined signals result in the steerable beam pointing in the direction maximizing the signal, - it checks the quality of the signal by means of the received strength and/or bit error rate,
- it rates the frequency if it is the best quality signal of the frequencies so far checked.
The Psmc-Channel carries an electronic bulletin board which also contains system table information. The AES compares the version number of its system table with that of the one being received from the logged on GES. According to the content of the updated system table, the AES may re-select the satellite at this point. Then, after selection of a Pd frequency, the AES selects a GES according to frequency specified in the ORT or at random from the system table and whether the GES is operating a Pd-Channel in the spot beam where the AES is located. The GES identifies the AES by its technical address and registers the AES as operational in that region. At this point the AES is considered to be logged onto the system.
NOTE: Each GES monitors P-Channel transmissions of every other GES in the same satellite region. Thus, when an AES logs onto a GES, the other GES's in that region also note its presence. This feature assists in the completion of connections for ground-initiated calls to aircraft operating in that satellite region. It also allows an AES to place a call through a GES other than the one to which it is logged on.
(b) Call initiation
1 Air-to-ground calls
When a call is initiated by an airbone subscriber, the AES sends signals to the GES, using the Rd-Channel. When the GES receives the call request, it assigns a pair of C-Channels, for a voice call, or reserves time on a T-Channel, for long-duration data transmissions. The call can then go through.
The assigned channels are reserved for as long as the call is in progress. The sequence used to initiate the call is automatic and transparent to both the originator and the receiver of the call.
When a call is initiated by an airbone subscriber, the AES sends signals to the GES, using the Rd-Channel. When the GES receives the call request, it assigns a pair of C-Channels, for a voice call, or reserves time on a T-Channel, for long-duration data transmissions. The call can then go through.
The assigned channels are reserved for as long as the call is in progress. The sequence used to initiate the call is automatic and transparent to both the originator and the receiver of the call.
2 Ground-to-air calls
The installed cabin system does not allow to establish ground-to-air calls. Moreover calls initiated from the ground are currently not allowed for safety reasons.
The installed cabin system does not allow to establish ground-to-air calls. Moreover calls initiated from the ground are currently not allowed for safety reasons.
(c) Log-on renewal
If degradation or loss of the P-Channel is detected by the AES after log-on, the AES attempts to re-establish communication with its logged on GES.
The AES uses the assigned Pd/Rd frequencies to renew log-on, but if this fails, the AES tunes to the Psmc and Rsmc frequencies of the logged on GES and tries to log-on again. If the Psmc frequency is satisfactorily received within 10 seconds, then log-on to the same GES is renewed.
If the Psmc frequency is not received within 10 seconds, then the SDU tunes to the Psmc frequency of the next preferred GES. The AES initiates a handover log- on procedure with this GES if its Psmc frequency is successfully received within 10 seconds. If the Psmc frequency of the next preferred GES is not received within 10 seconds, the AES deems itself logged off but does not transmit a log-off request. Then the AES reverts to a satellite search procedure. During log on renewal in the same satellite region, the flight information is not transmitted with the log-on request.
If degradation or loss of the P-Channel is detected by the AES after log-on, the AES attempts to re-establish communication with its logged on GES.
The AES uses the assigned Pd/Rd frequencies to renew log-on, but if this fails, the AES tunes to the Psmc and Rsmc frequencies of the logged on GES and tries to log-on again. If the Psmc frequency is satisfactorily received within 10 seconds, then log-on to the same GES is renewed.
If the Psmc frequency is not received within 10 seconds, then the SDU tunes to the Psmc frequency of the next preferred GES. The AES initiates a handover log- on procedure with this GES if its Psmc frequency is successfully received within 10 seconds. If the Psmc frequency of the next preferred GES is not received within 10 seconds, the AES deems itself logged off but does not transmit a log-off request. Then the AES reverts to a satellite search procedure. During log on renewal in the same satellite region, the flight information is not transmitted with the log-on request.
(d) Handover
1 Automatic handover
Automatic handover is initiated upon detection of Pd-Channel link degradation, which is defined as the error rate rising above 10 to the power of -4 over an averaging period of three minutes, or more than 10 short term interruptions in any three-minute period. Automatic handover is also initiated upon detection of loss of Pd-Channel, which is defined as clock synchronization for more than 10 seconds, and the resulting log-on renewal procedure is unsuccessful.
Automatic handover is initiated upon detection of Pd-Channel link degradation, which is defined as the error rate rising above 10 to the power of -4 over an averaging period of three minutes, or more than 10 short term interruptions in any three-minute period. Automatic handover is also initiated upon detection of loss of Pd-Channel, which is defined as clock synchronization for more than 10 seconds, and the resulting log-on renewal procedure is unsuccessful.
2 GES-GES handover
A GES to GES handover is carried out by logging on to a new GES in the same satellite region. The AES carries out a log on procedure to the new GES.
A GES to GES handover is carried out by logging on to a new GES in the same satellite region. The AES carries out a log on procedure to the new GES.
3 Spot beam-spot beam handover
After a log-on prompt, loss of P-Channel quality or a log-on renewal request, if the AES attempts to renew its log on and fails to log-on its previous GES or to the preferred alternative GES, the AES returns to the latter stages of the initial search procedure. The AES then scans the spot beam primary Pd frequencies on its current satellite to identify an alternate spot beam.
After a log-on prompt, loss of P-Channel quality or a log-on renewal request, if the AES attempts to renew its log on and fails to log-on its previous GES or to the preferred alternative GES, the AES returns to the latter stages of the initial search procedure. The AES then scans the spot beam primary Pd frequencies on its current satellite to identify an alternate spot beam.
4 Satellite-Satellite handover
If during log-on renewal, the AES is unable to log onto its previous GES or to another GES in the same satellite region, then the AES enters search mode. Having selected a new suitable quality Psmc-Channel (on another satellite in this case) and update the system table for the new region (if necessary), the AES carries out a log-on procedure with the new GES.
If during log-on renewal, the AES is unable to log onto its previous GES or to another GES in the same satellite region, then the AES enters search mode. Having selected a new suitable quality Psmc-Channel (on another satellite in this case) and update the system table for the new region (if necessary), the AES carries out a log-on procedure with the new GES.
5 Log-off
The AES should log off prior to terminating its operation. This log-off may be initiated either directly or as a result of some turn-down procedure associated with the end of an in-service period for the AES. The AES aborts any calls in progress, and transmits a request for log-off to the logged on GES.
The AES should log off prior to terminating its operation. This log-off may be initiated either directly or as a result of some turn-down procedure associated with the end of an in-service period for the AES. The AES aborts any calls in progress, and transmits a request for log-off to the logged on GES.
C. SATCOM Cockpit Voice Function
(a) Cockpit calls by manual dialing
This manual dialing function can be inhibited if requested in the ORT of the SDU.
The basic sequence is as follow:
This manual dialing function can be inhibited if requested in the ORT of the SDU.
The basic sequence is as follow:
1 Select SATCOM menu from the MCDU: line key 5L.
2 Select MANUAL DIAL on the SATCOM MAIN MENU page: line key 5R.
3 To change the default priority, push the slew up (or slew down) key on the MCDU keyboard.
4 To change the default channel, enter the wanted number in the scratchpad, and push line key 4L.
5 Type the phone number in the scratchpad (international prefix: 00, followed by country code, area code, phone number) and push line key 2L.
6 Select line key 6R to pre-select the number.
Then the SATCOM MANUAL DIAL page returns to the SATCOM MAIN MENU page. The phone number just entered appears on 2L data line if channel 1, or on 4L data line if channel 2.
Then the SATCOM MANUAL DIAL page returns to the SATCOM MAIN MENU page. The phone number just entered appears on 2L data line if channel 1, or on 4L data line if channel 2.
NOTE: Once a number is entered, it cannot be cleared but may be replaced by entering a new number.
7 Initiate the call by selecting the associated SATCOM channel SAT1 (SAT2) transmission pushbutton switch on the Audio Control Panel.
8 On this pushbutton switch, green lines flash during the call establishment. When the call is established, these green lines become steady.
On the SATCOM MAIN MENU page, CONNECTED indication replaces DIALING indication in front of SAT1 (SAT2).
On the SATCOM MAIN MENU page, CONNECTED indication replaces DIALING indication in front of SAT1 (SAT2).
(b) Cockpit call with pre-selected numbers (numbers from the system Directories)
The basic sequence is as follows:
The basic sequence is as follows:
1 Select SATCOM MENU from the MCDU: line key 5L.
2 Select DIRECTORY> on the SATCOM MAIN MENU page: line key 6R.
3 On the DIRECTORY page, pick the category subdirectory where the phone number has been stored according to its priority by pushing line key 1L, 2L, 3L, or 4L.
4 On the CATEGORY NUMBER page, select the phone number by pushing the line key adjacent to the desired called party (ex: SAFETY).
Related phone number is automatically selected and page returns to the SATCOM MAIN MENU page where the mnemonic of the number selected is displayed in small font with the mention "READY TO CONNECT".
Related phone number is automatically selected and page returns to the SATCOM MAIN MENU page where the mnemonic of the number selected is displayed in small font with the mention "READY TO CONNECT".
NOTE: It is possible to change the default value of the channel number, for instance, on MCDU1, to override the default value (1), enter 2 in the scratchpad and then push line key 1R.
2 appears in blue and large font on 1R line.
To return to the default value (1), push CLEAR on the MCDU keyboard (CLEAR is displayed in the scratchpad) and then push line key 1R.
2 appears in blue and large font on 1R line.
To return to the default value (1), push CLEAR on the MCDU keyboard (CLEAR is displayed in the scratchpad) and then push line key 1R.
5 Initiate the call by selecting the associated SATCOM channel SAT1 (SAT2) transmission pushbutton switch on the ACP.
6 On this pushbutton switch, green lines flash during call establishment. When the call is established, the green lines become steady.
7 On the SATCOM MAIN MENU page, the phone number selected appears in large front with the mention "CONNECTED".
(c) Adding a phone number to the directory
1 Select SATCOM menu from the MCDU.
2 Select DIRECTORY> on the SATCOM MAIN MENU page: line key 6R
3 Select the category list where you want to store the number
4 Go to the phone list, on the last page of the category, where brackets are displayed prompting entry for a new phone number, including mnemonic.
5 Enter the phone number in the scratchpad.
6 Push the line key in front of the brackets.
7 Enter the number mnemonic and push the line key in front of the brackets.
NOTE: The pilot may enter the number or the mnemonic first .
NOTE: A manually-entered number is treated as unprotected and therefore modifiable and/or deletable through normal scratchpad usage.
(2) Ground-to-air call set-up
Incoming calls to the flight crew are announced by the SELCAL chime (except if flight phase inhibition) and on the ACP, by flashing of the CALL legend on SAT1 (SAT2) pushbutton switch.
To answer the call, select the SATCOM channel on the SAT1 (SAT2) on the ACP:
The green line on SAT1 (SAT2) reception pushbutton switch comes on (steady).
Incoming calls to the flight crew are announced by the SELCAL chime (except if flight phase inhibition) and on the ACP, by flashing of the CALL legend on SAT1 (SAT2) pushbutton switch.
NOTE: Pushing RESET pushbutton switch on ACP can stop chime and switch-off CALL legend.
If the priority of the call is higher than 4, SATCOM ALERT is simultaneously displayed on the ECAM.
In addition, on the SATCOM MAIN MENU, GROUND TO AIR CALL is displayed under the channel concerned (SAT1 or SAT2), with the associated priority. If the priority of the call is higher than 4, SATCOM ALERT is simultaneously displayed on the ECAM.
To answer the call, select the SATCOM channel on the SAT1 (SAT2) on the ACP:
The green line on SAT1 (SAT2) reception pushbutton switch comes on (steady).
(3) HOLD function
When a SATCOM call is established (after air-to-ground call or ground-to-air call setup) on SAT1 (SAT2) the selection of another radio communication (HF or VHF) causes the AMU to switch audio transmission from the SDU to another radio (HF or VHF).
On the ACP, the green lines on SAT1 (SAT2) transmission pushbutton switch flash and the green lines of the selected radio (HF or VHF) pushbutton switch come on.
To return to the SATCOM call, reselect the SATCOM channel or deselect the same radio (HF or VHF) on the ACP.
Then the green lines of the selected radio (HF or VHF) transmission pushbutton switch go off and the green lines of SAT1 (SAT2) transmission pushbutton switch become steady.
The AMU enables audio transmission to SDU.
When a SATCOM call is established (after air-to-ground call or ground-to-air call setup) on SAT1 (SAT2) the selection of another radio communication (HF or VHF) causes the AMU to switch audio transmission from the SDU to another radio (HF or VHF).
On the ACP, the green lines on SAT1 (SAT2) transmission pushbutton switch flash and the green lines of the selected radio (HF or VHF) pushbutton switch come on.
To return to the SATCOM call, reselect the SATCOM channel or deselect the same radio (HF or VHF) on the ACP.
Then the green lines of the selected radio (HF or VHF) transmission pushbutton switch go off and the green lines of SAT1 (SAT2) transmission pushbutton switch become steady.
The AMU enables audio transmission to SDU.
(a) Air-to-ground call termination:
Two cases are possible:
Two cases are possible:
- SATCOM call is established (not on HOLD)
- SATCOM call is established (on HOLD)
1 SATCOM call is established (not on HOLD)
Reselect the SATCOM channel on the ACP to stop the SATCOM call:
SATCOM mic light goes off
AMU disables audio transmission to SDU after 3 seconds.
The call is terminated.
Reselect the SATCOM channel on the ACP to stop the SATCOM call:
SATCOM mic light goes off
AMU disables audio transmission to SDU after 3 seconds.
The call is terminated.
2 SATCOM call is established (on HOLD)
Two reselections of the SATCOM channel on the ACP are necessary to stop the SATCOM call.
Two reselections of the SATCOM channel on the ACP are necessary to stop the SATCOM call.
- The first reselection brings back to case where SATCOM call is established, not on hold.
- The second selection of the SATCOM channel on the ACP terminates the call.
(b) Ground-to-air call termination
SATCOM call is established (on HOLD or not on HOLD)
The call termination is initiated from the ground, the SATCOM ACP mic light (green bars) goes off.
SATCOM call is established (on HOLD or not on HOLD)
The call termination is initiated from the ground, the SATCOM ACP mic light (green bars) goes off.
8. BITE Test
The CFDS (Centralized Fault Display System) permits the SATCOM system faults to be displayed on the MCDU and to be printed on the printer.
The SATCOM system communicates with the CFDIU through two ARINC 429 buses. The CFDIU has two operating modes:
The CFDS (Centralized Fault Display System) permits the SATCOM system faults to be displayed on the MCDU and to be printed on the printer.
The SATCOM system communicates with the CFDIU through two ARINC 429 buses. The CFDIU has two operating modes:
- normal mode : during the normal mode, the BITE cyclically monitors the status of the SATCOM cards and transmits this data to the CFDIU during the flight. In case of fault detection the BITE stores the information in the fault memory.
- the menu mode, enables communication between the CFDIU and the SATCOM BITE through the MCDU. The BITE test can only be activated on ground.
A. Menu mode
(1) SYSTEM REPORT/TEST function
This function enables access to all the electronic systems and to the SATCOM system.
When the line key adjacent to the SATCOM indication is pushed on the MCDU, the CFDIU establishes the dialog and provides access to one of the following items:
This function enables access to all the electronic systems and to the SATCOM system.
When the line key adjacent to the SATCOM indication is pushed on the MCDU, the CFDIU establishes the dialog and provides access to one of the following items:
- LAST LEG REPORT
- PREVIOUS LEGS REPORT
- LRU IDENTIFICATION
- GROUND SCANNING
- TROUBLE SHOOTING DATA
- CLASS 3 FAULTS
- TEST
- GROUND REPORT.
(a) LAST LEG REPORT
This report contains the internal computer faults recorded during the last flight.
If no faults have occurred during the last leg, "No Fault detected" is displayed.
This report contains the internal computer faults recorded during the last flight.
If no faults have occurred during the last leg, "No Fault detected" is displayed.
(b) PREVIOUS LEGS REPORT
The PREVIOUS LEGS REPORT contains class 1 and class 2 Faults that occurred during the last 63 flights.
The PREVIOUS LEGS REPORT contains class 1 and class 2 Faults that occurred during the last 63 flights.
(c) LRU IDENTIFICATION
The LRU IDENTIFICATION displays the HARDWARE (P/N) and the SOFTWARE (SW/N) Part Number.
The LRU IDENTIFICATION displays the HARDWARE (P/N) and the SOFTWARE (SW/N) Part Number.
(d) GROUND SCANNING
This function permits the display of 1, 2 and 3 internal and external faults as they appear as long as this function is activated.
This function permits the display of 1, 2 and 3 internal and external faults as they appear as long as this function is activated.
(e) TROUBLE SHOOTING DATA
This function permits the display in hexadecimal form of class 1, 2 and 3 external and internal faults.
This function permits the display in hexadecimal form of class 1, 2 and 3 external and internal faults.
(f) CLASS 3 FAULTS
This function permits the display of all the class 3 internal and external faults.
This function permits the display of all the class 3 internal and external faults.
(g) TEST
The TEST page permits the detection and the isolation of faulty equipment.
The TEST page permits the detection and the isolation of faulty equipment.
(h) GROUND REPORT
This function permits the display of all the class 1, 2 and 3 internal faults.
This function permits the display of all the class 1, 2 and 3 internal faults.