363-206-295
Circuit Pack Descriptions
7-8 Issue 1 December 1997
Transmission/Timing Circuit Pack Interfaces 7
The main processor can read and write parameters on the transmission circuit
packs through a custom serial interface called the intra-shelf control bus. These
circuit packs have a built-in serial link receiver which provides an address map
into the device. Through this interface, the processor accesses the custom
devices and circuit pack parameters, as well as a small EEPROM which stores
each circuit pack's inventory information (Common Language
CLEI
*
code, date of
manufacture, etc.). Through this link, the main processor can also light the
faceplate LEDs on the circuit packs.
Redundancy has been built into this bus to allow a pack to be switched out of
service in the event of a failure within a circuit pack.
Operation Interfaces 7
The SYSCTL supports all of the operations interfaces described in Section 6,
"Operations Interfaces."
OC-12 Transport Overhead Channel 7
The OHCTL terminates an overhead channel from each main and function unit
slot in the shelf, passing information to the SYSCTL over the intra-shelf processor
bus.
* Common Language is a registered trademark and CLEI, CLLI, CLCI, and CLFI are
trademarks of Bell Communications Research, Inc.
To Next Page
Loading...
Need help?
General
