Circuit Pack Descriptions
7-96 Issue 8.0 July 2002
i. Bridges 155.52 Mb/s signals (STS-3 tributaries) at the primary node to
provide two identical signals to the other ring in dual ring interworking
applications
j. Performs internal fault detection and interfaces with the LNCTL circuit pack
using the board controller local area network (BCLAN)
k. Controls the circuit pack faceplate FAULT LED
l. Stores inventory information (CLEI code, serial number, etc.).
Maintenance Signal Functions 7
The OC48 RCVR A/D circuit pack performs the following maintenance signal
functions:
a. Detects incoming OC-48 loss of signal (LOS) and loss of frame (LOF)
b. Detects line AIS from the incoming OC-48 signal
c. Detects RDI-L signals from the incoming OC-48 signal
d. Inserts an STS-1 path AIS in each STS-1 tributary of the 155.52 Mb/s
signal transmitted to the low speed interface circuit pack.
e. Signals the OC48 TRMTR circuit pack to insert an RDI-L signal in the
OC-48 signal
f. Passes RDI-P signals from the incoming OC-48 signal to the low speed
interface circuit packs.
g. Passes embedded DS3 AIS from the incoming OC-48 signal to the DS3
circuit pack.
h. Passes embedded STS-1 path AIS from the incoming OC-48 signal to the
low-speed interface circuit packs.
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