Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Voice - Transparent CCS

Has anybody done any configs with transparent CCS.

I need to configure this for a VOIP link using Clear Channel Code over IP.

I have found a config on Cisco -

I am having trouble understanding the relation with the POTS / VOIP configs and the PABX. What does the PABX send to the router in relation to a call. The PABX is using DPNSS signaling.

Normally voice routers do inteligent call routing depending on your dial-peer voip configs, but the above document has 6000 & 8000 pots configs. Just wondering how the PABX fits into these configs. Do these 6000 & 8000 pots configs have any relation with the call coming from the PABX or are they just a number.

If anybody has done transparent CCS, could they possible send me a copy of their configs, excluding IP addresses(obviously) or point me to any more links with relavent information.

Cisco Employee

Re: Voice - Transparent CCS

PABX will connect with the gateway over trunk line like E1 in the config examples in the above url. so the call will come in the gateway over E1 and since the trunks are nailed up between two gateway, based on the number dialed like 6000 or 8000 the call will be forwarded to appropriate voice-port as configured under the dial-peer.

So the network will look like

PABX----E1----Gateway-------IP Network-----Gateway-----E1---PABX

visit following link to get yourself clear on that


Cisco Employee

Re: Voice - Transparent CCS


I am not sure if you had your question answer or not yet.

In any case, the router is just transparently passing the traffic across.

The pabx are actually talking to one another in T-CCS mode.

The value 6000 and 8000 are used by the router to create the one to one

mapping of each timeslot on each side. It is used to establish the connection

between the two sites and create a virtual wire between the two pabx.

For more information, please take a look at the following url:



CreatePlease login to create content