Configuring Support for PBX Signalling Protocols

Configuring Transparent CCS on the Cisco MC3810

 

Command

Purpose

 

 

 

 

 

 

Step 5 For Cisco MC3810 series analog voice ports:

 

Enters voice-port configuration mode.

 

 

router(config)# voice-portslot/port

 

 

 

 

 

 

For Cisco MC3810 series digital voice ports:

 

 

 

 

 

 

router(config)# voice-portslot:ds0-group

 

 

 

 

 

 

 

 

 

 

Step 6 Router(config-voiceport)# connection plar string

 

Configures the voice-port connection to support

 

 

 

 

PLAR mode. For the string, enter the number of the

 

 

 

 

voice channel that was configured as the

 

 

 

 

ext-sig-slave for the voice-group command.

 

 

 

 

 

 

 

 

 

 

 

Note After a transparent CCS connection is

 

 

 

 

 

 

configured with the connection plar

 

 

 

 

 

 

command, any change to the configuration

 

 

 

 

 

 

will not take place until the connection is shut

 

 

 

 

 

 

down with a shutdown command and then

 

 

 

 

 

 

restarted with a no shutdown command. For

 

 

 

 

 

 

example, the phone number supplied in the

 

 

 

 

 

 

connection plar command can be changed

 

 

 

 

 

 

while the connection is in no shutdown state,

 

 

 

 

 

 

but the change will not cause the current

 

 

 

 

 

 

connection to be closed and a new connection

 

 

 

 

 

 

opened to the new phone number. This will

 

 

 

 

 

 

only take effect on the next no shutdown

 

 

 

 

 

 

command after a shutdown command.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The voice channel type configured as the ext-sig-masteris considered the master side of the permanent virtual circuit (PVC) connection and is responsible for establishing the PVC connection. After the master channel is configured, a fixed timer of 30 seconds starts. The voice signalling driver then generates an off-hook signal on the master voice channel after the timer expires. The call is treated as a regular call, and the master voice channel will not hang up after the connection is made. If the call does not go through, or if the T1/E1 trunk is down, the 30-second timer on the master channel side restarts. A new off-hook signal is then generated at the master channel side after the timer expires.

CCS cross-connect is not supported on analog PVC connections.

Configuring CCS Frame-Forwarding

The Cisco MC3810 provides support for CCS frame-forwarding, which allows the Cisco MC3810 DVM to be connected to a Private Telco Network Exchange (PTNX) without needing to interpret CCS signalling information for call processing. CCS frame-forwarding forwards High-Level Data Link Control (HDLC) frames over a preconfigured interface running HDLC, Frame Relay, or ATM encapsulation.

With CCS frame-forwarding, the connection between PTNXs over the network must be point-to-point and preconfigured. With the CCS frame-forwarding implementation, calls from the PTNX devices are not routed, but follow a preconfigured route to the destination.

Cisco IOS Multiservice Applications Configuration Guide

MC-430

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Cisco Systems MC-413 manual Configuring CCS Frame-Forwarding, Ext-sig-slave for the voice-group command, MC-430
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