ADC 3 Configuring Clock Sources

ADC Telecommunications, Inc.
86 CHAPTER 4: CHASSIS CONFIGURATION
! POS Module
slot 1/8
!
! Interface 1/8/1 POS MAC
interface pos 1/8/1
arp timeout 0
!
! BasPppProtocol
root
Configuring Clock Sources
The Cuda 12000 IP Access Switch backplane has a primary clock (A) and a
secondary clock (B). For each of these clocks, you can configure one of the
following clock sources:
■External BITS-A clock source
■External BITS-B clock source
■External Packet-Over-SONET (POS) clock source
■Internal Stratum-3 oscillator clock source on the management module
If you do not configure any clock sources, each DOCSIS/EuroDOCSIS module
uses its own clock.
If you are using a BITS-A or BITS-B external clock source, make sure that the
Cuda 12000 is connected to the appropriate clock sources via the BITS-A or
BITS-B external clock connectors. Refer to the Cuda 12000 IP Access Switch
Installation Guide for more information on these connectors.
If you are using a POS module as the clock source, make sure that the
interface on the POS module has been configured t o receive clocking from
the other (remote) side of the POS link. To do this, issue the following
command from within POS interface mode:
clock-source line
Refer to Chapter7 “Packet Over SONET Administration” for more
information on configuring POS interfaces.