Alcatel-Lucent 1643 AMS Applications And Planning Manual page 114

Product description
Functional description of the X12SHDSL option card
The following figure shows the architecture of the X12SHDSL option card. The option
card provides 12 SHDSL interfaces compliant to ITU-T G.991.2. The data rate of each
SHDSL interface depends on the selected operation mode. The X12SHDSL option card
uses both the P1 and the P2 connector for the communication with the main board.
Main
Board
Main
Board
Operation modes
The 1643 AM / 1643 AMS can be configured as LTU and operated in E1 or TU-12
mode.
The mode selections apply to the 1643 AM / 1643 AMS as a whole. The selections
cannot be made to individual ports.
The E1 or TU-12 mode can be provisioned using ITM-CIT or Lucent OMS. The
TU-12 mode offers the possibility to utilize SDH functionalities for the SDH link, e.g.
Performance Monitoring or Fault Management.
SHDSL line rates
The SHDSL line rate of the X12SHDSL option card depends on the TU-12/E1 mode
selection:
In TU-12 mode, the SHDSL rate 2320 kbit/s, i.e. 2x 8 kbit/s overhead and 2304 kbit/s
payload.
In E1 mode, the SHDSL rate 2056 kbit/s, i.e. 8 kbit/s overhead and 2048 kbit/s
payload.
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P1
Connector
Demapper
P2
Connector
Alcatel-Lucent - Proprietary
See notice on first page
E1
Mapper/
SHDSL
Transceiver
TU-12
Sync/
Desync
Power
Module
X12SHDSL option card
Inventory
EEPROM
365-312-801R7.2
Issue 3, May 2007