Making a long distance call using a Remote CCM

Unanswered Question
Sep 23rd, 2010

The topology is like this:

GW1(h.323) ----------------------------- HQ(CCM 4.0)

GW1 : is at branch 1 and has a local call only (Cisco 2821 Router), located in washington DC

HQ : is at main branch and has a long distance call, located in springfield VA

I want to make a long distance call for users at GW1.

I think they have to connect to HQ because they don't have long distance call service provider.

The configuration of GW1 is as follows.

dial-peer voice 401 voip

destination-pattern 81..........

session target ipv4:    -> ( CCM ip address)

dtmf-relay h254-alphanumeric

codec g711ulaw

ip qos dscp cs5 media

But, it didn't work. Please help me. Thanks

I have this problem too.
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Christopher Graham Thu, 09/23/2010 - 15:29

Assuming the IP phones are registered to CUCM, the dial peer on GW1 is unnecessary.  You need to do your call routing in CUCM.  The CSS for the IP phones (or DN's, depending on your configuration) needs to contain a Partition with a LD route pattern.  This route pattern should point to the HQ router.  The GW1 router would not need to be in the call flow.

jaschulz Thu, 09/23/2010 - 21:06


As Chris suggested the CAC should be done at the CUCM level. You could just replace the route list or gateway you have for you LD route pattern now and point to a route list/gw that contains the route group of the HQ trunks.

jaschulz Fri, 09/24/2010 - 10:20

So then the phones at the branch office are on a different office then the ones at the HQ? If that is the case you will need to create an ICT(intercluster trunk) that is able to communicate with the HQ cluster. You will then change the route pattern for LD calls at the branch office to point to the ICT in the route list. Let us know if your needing help setting this up.


msdalhurra Fri, 09/24/2010 - 10:59

Yes, I need your help.

I set up inter-cluster trunk(non-gatekeeper controlled).

But still i'm not sure whether they communicate with HQ.

Once again, GW1(Cisco 2821 router) has no CCM.

I configured VOIP in Cisco 2821 router.

In HQ, everything is configure in CCM.


msdalhurra Fri, 09/24/2010 - 14:08

I think i made some confusion to you.

Here is the correct info.

1. HQ has call manager Server.

2. GW1 has call manager express inside the cisco 2821 router

Each phone in GW1 ia already registerd with CCM.

GW1 user wants to use long distance call access to HQ.

msdalhurra Fri, 09/24/2010 - 08:16

The ip phone is not registered to CCM in HQ.

I tried to register using CCM but the result is as below.

registration : unknown

ip address :


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