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Line Interface Modules
155E-2 STM-1 Electrical LIM Overview
The 155E-2 STM-1 Electrical LIM can be used with a variety of controllers listed in
Table
1-4. This dual port STM-1 electrical interface LIM transmits/receives data
over a pair of 75 ohm coaxial cables at a speed of 155.52 Mbps, using the
concatenated framing format for ATM over the SONET/SDH as defined in ITU-T
I.432, ANSI T1.646 and Bellcore GR-253-CORE. The 155E-2 LIM is clock-friendly
and capable of interfacing with the Xedge system timing reference bus.
Front Panel Indictors
•
AL (Alarm) LED illuminates RED when link is enabled and a LIM fault exists
at the associated link. When off, the link is disabled or no LIM fault exists.
•
IS (In Service)LED illuminates GREEN when the associated link is enabled and
there is valid communication with the associated Slot Controller. When off, the
link is disabled or there is no Slot Controller communication. In the diagnostic
mode, this LED flashes.
Front Panel Connectors
•
Link 0 Tx is the coaxial BNC connector for the Link-0 transmit signal.
•
Link 0 Rx is the coaxial BNC connector for the Link-0 receive signal.
•
Link 1 Tx is the coaxial BNC connector for the Link-1 transmit signal.
•
Link 1 Rx is the coaxial BNC connector for the Link-2 receive signal.
Figure 5-15
032R440-000
Issue 17
Storage Position
Link-0 Jumper
(Chassis Ground)
Boot Jum per
For Factory
Use Only
3
Load Softw are
Jum p P ins 2 & 3
2
Normal (store)
Jum p P ins 1 & 2
1
(norm al show n)
Storage Position
(Chassis G round)
155E-2 STM-1 Electrical LIM Front Panel and Jumper Positions,
Xedge 6000 Hardware
Installation & Setup Guide
155E-2 STM-1 Electrical LIM Overview
Link-1 Jumper
155E-2
LINK 0
AL IS
TX
RX
LINK 1
AL IS
TX
RX
5-25
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