tdm

This command configures various TDM clock synchronization and bus.

Syntax

(config-voip)# media tdm
(media-tdm)# 

Command

Description

tdm-bus-clock-source {internal|network}

Defines the clock source on which the device synchronizes.

idle-abcd-pattern

Defines ABCD (CAS) pattern applied on signaling bus before it is changed.

idle-pcm-pattern

Defines the PCM pattern applied to the E1/T1 timeslot (B-channel) when the channel is closed and during silence periods when Silence Compression is used.

pcm-law-select {alaw|automatic|mulaw}

Defines the type of PCM companding law in the input/output TDM bus.

pstn-bus-auto-clock {off|on}

Enables the PSTN Trunk Auto-Fallback feature.

pstn-bus-auto-clock-reverting {off|on}

Enables the PSTN Trunk Auto-Fallback Reverting feature.

tdm-bus-auto-fallback {holdover| internal}

Defines the fallback clock (when auto clock on).

tdm-bus-local-reference <Trunk ID>

Defines the Trunk ID for the clock synchronization source of the device.

Command Mode

Privileged User

Example

This example defines the clock source as internal and uses Trunk Group ID 1:

(config-voip)# media tdm
(media-tdm)# tdm-bus-clock-source internal
(media-tdm)# tdm-bus-local-reference 1
(media-tdm)# activate