Command Reference Guide E1 Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 597
clock source [internal | line | through]
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 E1 circuit.
through Configures the unit to recover clocking from the circuit connected to the G.703
interface.
Default Values
By default, the unit is configured to recover clocking from the primary circuit.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, 4000, and 5000 Series units.
Command History
Release 5.1 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 e1 1/1
(config-e1 1/1)#clock source line
