3Com 3031 Command Reference Manual page 163

3com 3031: reference guide

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Fundamental WAN Interface Configuration Commands

"FF" (that is, the high level of all "1s") to make the identification. For the sake of

compatibility in this case, it is necessary to configure the line idle-mark of the

synchronous serial interface.

Set the line idle-mark of the synchronous serial interface to FF.

[3com-Serial0/0/0]idle-mark

invert transmit-clock

invert transmit-clock

undo invert transmit-clock

Serial interface view

Using the invert transmit-clock command, you can enable the inverting of the

transmit-clock signal of the synchronous serial interface at the DTE side. Using the

undo invert transmit-clock command, you can disable inverting the signal.

By default, transmit-clock signal inversion is disabled on the synchronous serial

interface at DTE side.

In some special cases, for the purpose of eliminating the half-period delay of the

clock on the line, you may make the configuration to make the system invert the

transmit-clock signal of the synchronous serial interface at the DTE side. This

command can take effect only on some specific DCE devices. Clock inversion is

unnecessary for general applications.

For related commands, see physical-mode and clock.

Invert the transmit-clock of the synchronous serial interface at DTE side.

[3com-Serial0/0/0]invert transmit-clock

undo loopback

Serial interface view