Invert Transmit-Clock; Loopback - H3C SR6600 Command Reference Manual

invert transmit-clock

Syntax
invert transmit-clock
undo invert transmit-clock
View
Serial interface view
Default Level
2: System level
Parameters
None
Description
Use the invert transmit-clock command to invert the transmit-clock signal on the DTE-side
synchronous serial interface.
Use the undo invert transmit-clock command to restore the default.
By default, transmit-clock signal inversion is disabled on DTE-side synchronous serial interfaces.
Sometimes, you may need to invert the receive-clock signal on a DTE-side serial interface to eliminate
the half clock-period delay on the line. This command is necessary only for some special DCE devices.
In common applications, clock must not be inverted.
Related command: invert receive-clock and clock.
Examples
# Invert the transmit-clock on DTE-side synchronous serial interface Serial 2/0/0.
<Sysname> system-view
[Sysname] interface serial 2/0/0
[Sysname-Serial2/0/0] invert transmit-clock

loopback

Syntax
loopback
undo loopback
View
Synchronous serial interface view, AUX interface view
Default Level
2: System level
Parameters
None
Description
Use the loopback command to enable internal/external loopback on the serial interface.
Use the undo loopback command to restore the default.
By default, loopback is disabled.
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