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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter2 Cards Specifications
2.2.1 Common Control Cards
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.
Install TCC2 cards in Slots 7 and 11 for redundancy. If the active TCC2 fails, traffic switches to the
protect TCC2.
The TCC2 card has two built-in interface ports for accessing the system: an RJ-45 10BaseT LAN
interface and an EIA/TIA-232 ASCII interfacefor local craft access. It also has a 10BaseT LAN port for
user interfaces via the backplane.
2.2.1.2 TCC2P Card
The Advanced Timing,Communications, and Control Plus (TCC2P) card is an enhanced version of the
TCC2 card. The primary enhancements are Ethernet security features and 64K composite clock BITS
timing.
The TCC2P card performs system initialization, provisioning, alarm reporting, maintenance,
diagnostics, IP address detection/resolution, SONET SOH DCC/GCC termination, and system fault
detection for the ONS 15454. The TCC2P also ensures that the system maintains Stratum 3 (Telcordia
GR-253-CORE) timing requirements. It monitors the supply voltage of the system.
Figure 2-2 shows the faceplate and block diagram for the TCC2P card.