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CiscouBR10012 Universal Broadband Router Troubleshooting Guide
OL-1237-01
Chapter4 Troubleshooting Line Cards
Troubleshooting the Timing, Communication, and Control Plus Card
Troubleshooting the Timing, Communication, and Control Plus Card
At least one working Timing, Communication, and Control Plus (TCC+) card m ust be installed in the
Cisco uBR10012 router for normal operations. The TCC+ card acts as a secondary processor that
performs the following functions:
•Generates and distributes 10.24 MHz clock references to each cable interface line card.
•Generates and distributes 32-bit time stamp references to each cable interface line card.
•Allows software to independently power off any or all cable interface line cards.
•Provides support for Online Insertion/Removal (OIR) operations of line cards.
•Drives the LCD panel used to display system configuration and status information.
•Monitors the supply power usage of the chassis.
•Provides two redundant RJ-45 ports for external timing clock refe rence inputs such as a Global
Positioning System (GPS) or BITS clock.
If the Cisco uBR10012 router does not have a working TCC+ card insta lled, the WAN and cable interface
line cards will experience excessive packet drops, or all traffic will be dropped, because of an invalid
timing signal. Also, if no TCC+ card is installed, the cable power command is disabled, because this
function is performed by the TCC+ card.
Note Because the TCC+ card is considered a half-height card, use slot numbers 1/1 or 2/1 to display
information for the TCC+ card using the show diag command. The show cable clock and show
controllers clock-reference commands also use these slot numbers when displaying clock-related
information.
Figure4-1 TCC+ Front Panel
The front panel on the TCC+ card has seven LEDs. Tabl e 4-3 describes each LED on the TCC+ card.
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