Circuit Pack Descriptions
7-114 Issue 8.0 July 2002
Quick Reference Summary 7
Receive Functions 7
The OC48 REGENR circuit pack performs the following receive functions:
a. Receives a SONET standard OC-48 optical signal
b. Converts the OC-48 signal to an electrical STS-48 signal
c. Extracts the 2.5 GHz clock signal and regenerates the STS-48 data signal
d. Demultiplexes the STS-48 signal into sixteen 155.52 Mb/s signals
e. Extracts the SONET transport overhead bytes and sends them to the OW
circuit pack
f. Generates a 155.52 MHz timing reference signal and provides it to the PLL
circuit.
Transmit Functions 7
The OC48 REGENR circuit pack performs the following transmit functions:
a. Bit-interleaves the sixteen 155.52 Mb/s signals to produce a SONET
standard STS-48 signal
b. Modulates a laser transmitter to produce a SONET standard OC-48 optical
signal
c. Inserts the SONET transport overhead bytes in the OC-48 line.
Timing and Control Functions 7
The OC48 REGENR circuit pack performs the following timing and control
functions:
a. Extracts a 2.5 GHz clock signal from the incoming OC-48 high speed signal
b. Generates a 155.52 MHz timing reference signal and provides it to the PLL
circuit
c. Performs internal fault detection and interfaces with the LNCTL circuit pack
using the BCLAN
d. Controls the circuit pack faceplate FAULT LED
e. Stores inventory information (CLEI code, serial number, etc.).
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