Circuit Pack Descriptions
Issue 8.0 July 2002
7-31
Quick Reference Summary 7
The TOHCTL circuit pack performs the following control and interface functions:
a. Terminates up to eight OC-3/two OC-12 section overhead channels.
b. Provides communications with the OC-3/OC-12 (1.3 STD) circuit packs via
the overhead channel and DCC interface
c. Performs low-level (layers 1 through 3 of the OSI 7-layer stack) protocol
processing for the OC-3/OC-12 section DCC
d. Provides communications with the OHCTL (TERM) and SYSCTL circuit
packs using the OALAN interface
e. Controls the circuit pack faceplate FAULT LED.
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