Circuit Pack Descriptions
Issue 8.0 July 2002
7-35
Transmission 7
DS3 (LAA2/LAA2B) Circuit Pack Description 7
Purpose of Circuit 7
The DS3 Interface (DS3) circuit pack provides a low speed interface between
three asynchronous DS3 signals and an internal synchronous 155.52 Mb/s signal.
The LAA2/LAA2B DS3 (S1:1) circuit pack is compatible with Release 3.0.1-ADR
software only. The LAA2/LAA2B DS3 (S4:4) circuit pack is compatible with
Release 3.0.1-ADR or later software.
Faceplate LED 7
The DS3 circuit pack has a red FAULT LED on its faceplate (Figure 7-13). The red
FAULT LED is continuously lighted when a circuit pack failure is detected or when
the circuit pack loses power. If the circuit pack loses power, a separate path is
provided for power from the Line Controller (LNCTL) circuit pack to light the
FAULT LED on the DS3 circuit pack.
The board controller on the DS3 circuit pack detects hardware and software faults
on the circuit pack. When a fault occurs, the FAULT LED on the circuit pack is
continuously lighted. If an incoming DS3 signal from the DSX-3 panel (or
equivalent) fails, the FAULT LED will flash on and off.
Figure 7-13. DS3 (LAA2/LAA2B) Circuit Pack
DS3
LAA2
xxxxxxxxx_
FAULT
To Next Page
Loading...
Need help?
General