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Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
OL-18259-09
Chapter 1 Cisco uBR10012 Universal Broadband Router Overview
DOCSIS Timing, Communication, and Control Card
DOCSIS Timing, Communication, and Control Card
On the Cisco uBR10012 universal broadband router, the DTCC card acts as a secondary processor that
performs the following functions:
•
In the default DTI mode, a 10.24 MHz clock and 32-bit DOCSIS timestamp are generated by the
DTI Server, propagated to DTI client using DTI protocol, and distributed by DTI client to each cable
interface line card.
•
Allows software to independently power off any or all cable interface line cards.
•
Drives the LCD panel used to display system configuration and status information.
•
Monitors the supply power usage of the chassis.
•
Two RJ-45 cables with the DTI server, which, in turn, can generate the clock using its own oscillator
or external timing reference inputs such as GPS or network clock.
Two DTCC cards are installed and configured as active (primary) and backup (redundant). If the DTCC
card in the first slot is working at system power-up, it automatically becomes the active card and the
DTCC card in the second slot becomes the backup card. The DTCC cards monitor each other’s priority
information, so that if the active card fails, the active card role is transferred to the redundant backup
card without loss of data.
Figure 1-13
shows the faceplate of the DTCC card.
Figure 1-14
Cisco DTCC Front Panel
The front panel on the DTCC card has seven LEDs. They are labeled POWER, STATUS,
MAINTENANCE, PRESENT, and ACTIVE. The second set of PRESENT and ACTIVE LEDs are
associated with the primary and secondary external clock reference inputs.
For more information, see
Cisco uBR10012 Universal Broadband Router DTCC Card
.
231862
POWER
STATUS
MAINT
uBR10-DTCC
ACT
DTI2
LNK
ACT
DTI1
LNK