ADTRAN 1000R Series - Manual (Page 698)

Command Reference Guide T1 Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 698
clock source [internal | line | through | through <interface id>]
Use the clock source command to configure the source timing used for the interface. 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 T1 circuit.
through Configures the unit to recover clocking from the circuit connected to the DSX-1
interface.
through t1 <interface id> Configures the unit to recover clocking from the alternate interface. Only valid
on T1 systems with multiple T1 interfaces and a single clock source.
Default Values
By default, the clock source is set to line.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, 4000, and 5000 Series and Total Access 900 Series
units.
Command History
Release 1.1 Command was introduced.
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 primary circuit:
(config)#interface t1 1/1
(config-t1 1/1)#clock source line