ADTRAN 1000R Series Command Reference Manual page 679

Command Reference Guide Serial Interface Configuration Command Set
invert etclock
Use the invert etclock command to configure the serial interface to invert the external transmit reference
clock (et-clock) in the data stream before transmitting. Use the no form of this command to return to the
default value.
Syntax Description
No subcommands.
Default Values
By default, the serial interface does not invert et-clock.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, and 4000 Series and Total Access 900 Series units.
Command History
Release 1.1 Command was introduced.
Functional Notes
If the serial interface cable is long, causing a phase shift in the data, the et-clock can be inverted using the
invert etclock command. This switches the phase of the clock, which compensates for a long cable.
Usage Examples
The following example configures the serial interface to invert et-clock:
(config)#interface serial 1/1
(config-ser 1/1)#invert etclock
61200510L1-35E Copyright © 2005 ADTRAN 679