Important! The power of the 1643 AM / 1643 AMS must be switched off before
the option card is inserted.
X4X.21 option card
The X4X.21 option card provides four additional X.21 2 Mbit/s interfaces.
The X4X.21 option card is plugged into the P1 connector as described in “Front view
without cover” (p. 4-3). The physical interfaces are realized as four 15-pin female
Sub-D connectors.
It provides the following features:
• Four X.21 interfaces. The X.21 signals are bit-mapped into asynchronous 2 Mbit/s
PDH signals.
• Loopback of the external X.21 signals
• Support of LOS defect detection and AIS insertion as consequent action
• Support of re-timing via the X.21 2 Mbit/s
The following figure shows the block diagram of the X4X.21 option card.
Inventory
EEPROM
P1
Connector
Power
Module
Main
Board
DS1
Interface
Circuit
DS1 Connector
DS1 Port
< TP 2.1 >
DS1
Interface
Circuit
DS1 Connector
< TP 2.16 >
16 x
Product description
Option cards
...................................................................................................................................................................................................................................
365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
4-19
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