Datasheet

Command Reference
PA-E3 and PA-2E3 Serial Port Adapter 5
clock source (interface)
To control which clock a G.703 E1 interface, an E1-G.703/G.704 serial port adapter, or a PA-E3
serial port adapter will use to clock its transmitted data from, use the clock source interface
configuration command. To restore the default value, use the no form of this command.
clock source {internal
| line}
no clock source
Syntax Description
Default
The line’s receive data stream.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3.
This command was modified in Cisco IOS Release 11.1 CA to include the E1-G.703/G.704 serial
port adapter and PA-E3 serial port adapter.
This command applies to a Cisco 4000 router or Cisco 7000 series, Cisco 7200 series, and
Cisco 7500 series router. A G.703-E1 interface, PA-E3 serial port adapter, or E1-G.703/G.704 serial
port adapter can clock its transmitted data from either its internal clock or from a clock recovered
from the line’s receive data stream.
Example
The following example specifies the G.703-E1 interface to clock its transmitted data from its internal
clock:
interface serial 1/0
clock source internal
internal Specifies that the interface will clock its transmitted data from
its internal clock.
line Specifies that the interface will clock its transmitted data from a
clock recovered from the line’s receive data stream (default).