Tcc2 Functionality; Figure 14-1 Tcc2 Faceplate And Block Diagram - Cisco ONS 15454 DWDM Installation And Operation Manual

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14.2.1 TCC2 Card

14.2.1.1 TCC2 Functionality

The TCC2 card terminates up to 32 DCCs. The TCC2 hardware is prepared for 84 DCCs, which will be

available in a future software release.

The node database, IP address, and system software are stored in TCC2 nonvolatile memory, which

allows quick recovery in the event of a power or card failure.

The TCC2 performs all system-timing functions for each ONS 15454. The TCC2 monitors the recovered

clocks from each traffic card and two building integrated timing supply (BITS) ports for frequency

accuracy. The TCC2 selects a recovered clock, a BITS, or an internal Stratum 3 reference as the

system-timing reference. You can provision any of the clock inputs as primary or secondary timing

sources. A slow-reference tracking loop allows the TCC2 to synchronize with the recovered clock,

which provides holdover if the reference is lost.

The TCC2 monitors both supply voltage inputs on the shelf. An alarm is generated if one of the supply

voltage inputs has a voltage out of the specified range.

Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7

Crossconnect

Card Reference

December 2004