Command Reference Guide

SROS Command Line Interface Reference Guide T1 Interface Configuration Command Set
5991-2114 © Copyright 2005 Hewlett-Packard Development Company, L.P. 505
clock source [internal | line | through | through t1 <interface id>]
Use the clock source command to configure the source timing used for the interface. The clock specified
using the clock source command is also the system master clock. Use the no form of this command to
return to the default value.
Syntax Description
internal Configures the unit to provide clocking using the internal oscillator.
line Configures the unit to recover clocking from the primary circuit.
through Configures the unit to recover clocking from the circuit connected to the DSX-1
interface.
through t1 Configures the unit to recover clocking from the circuit connected to the specified
<interface id> T1 interface.
Default Values
By default, the clock source is set to line.
Command Modes
(config-t1 1/1)# T1 or DSX-1 Interface Configuration Mode required.
(config-t1 1/2)#
Functional Notes
When operating on a circuit that is providing timing, setting the clock source to line can avoid errors such
as Clock Slip Seconds (CSS).
Usage Examples
The following example configures the unit to recover clocking from the circuit:
(config)#interface t1 1/1
(config-t1 1/1)#clock source line