Cisco Systems UBR10012 manual TCC+ Front Panel

Chapter 4 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 must 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 reference inputs such as a Global Positioning System (GPS) or BITS clock.

If the Cisco uBR10012 router does not have a working TCC+ card installed, 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-referencecommands also use these slot numbers when displaying clock-related information.

Figure 4-1 TCC+ Front Panel

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The front panel on the TCC+ card has seven LEDs. Table 4-3describes each LED on the TCC+ card.

Cisco uBR10012 Universal Broadband Router Troubleshooting Guide

4-8 OL-1237-01