In the receive direction for both STM-1 interfaces, the optical signals are converted to
electrical signals in the optical receiver. Clock and data recovery circuits separate the
clock and data signals and feed them to the main ASIC. The main ASIC transmits two
preprocessed STM-1 signals to the Higher Order Cross-connect on the main board via
the P2 connector for further processing. The broadcast for the HO SNC/N is performed
on the main board as well.
On the X2S11TRIB option card itself the following functions are performed:
• RSOH/MSOH extraction/insertion
• DCC processing
• 1+1 VC-4 SNC/N
• STM-1 MSP
• Timing reference signal switching
Important! The power of the 1643 AM must be switched off before the option
card is inserted.
Note: The STM-1 optical option cards do not utilize SFP usage.
X2STM1ETRIB option card
The X2STM1ETRIB option card provides 2 electrical STM-1 tributary interfaces for
an 1643 AM equipped with STM-4 line interfaces.
The X2STM1ETRIB option card is plugged into the P2 connector as described in
“Front view without cover” (p. 4-3).
The X2STM1ETRIB option card supports two STM-1 input and two STM-1 output
signals. The physical interface for the STM-1 signals is a coaxial 1.6/5.6 connector.
Inventory
EEPROM
P2
Connector
Power
Module
Main
Board
STM1 Optical
Interface
STM1 Optical
Interface
STM-1
Tributary Ports
< TP2.1 >
ASIC
optical port:
universal
connector
TX
RX
< TP2.2 >
optical port:
universal
connector
TX
RX
Product description
Option cards
...................................................................................................................................................................................................................................
4-14
Alcatel-Lucent - Proprietary
See notice on first page
365-312-801R7.2
Issue 3, May 2007
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