Trunk between CCM and CCME

Unanswered Question
azjpiper151 Thu, 09/13/2007 - 20:00

I literally JUST did this today. Here are the directions and it works GREAT!!!

If you have questions or need help on it please let me know.


configuration needs to be apply on both ends CME and CCM.

on the CME portion, you need to have the following

dial-peer voice XX voip

destination-pattern XXXX

sesstion target ipv4:

on the call manager's end, you need to add the following

Create an H323 gateway and use the ip address of CME.

Make sure the CSS of this H323 gateway contain the IP phones Partition. This triped me up.

Look down in the config of the GW a little for "Call Routing Info" Inbound make sure this matches your phones

so CCM knows how to route the call to the ip phone.

and on call manager, you have to create a route pattern pointing to this CME router with the 4 digit extention,

and the ip phone have to have the access to this route pattern.

If you are going to enable fax fron site to site over the 4 digit dila you need this also:

voice service voip

modem passthrough nse codec g711ulaw redundancy maximum-session 5

dial-peer voice XX voip

modem passthrough nse codec g711ulaw redundancy

Juan Carlos Ari... Thu, 01/03/2008 - 15:48

Jason, I'm doing exactly this and I can't go on to work this out, I have a question for you, when you create H323 gateway on CCM by default uses port 1720, and in CME by default is 1719, which should I use?? Does it has to be the same port on both CME and CCM??


Juan Carlos Arias

bamnocadmin Fri, 09/14/2007 - 05:27


I just finished CCM and CME intergation. I used SIP.

Here is my config:

SIP trunk on CCME router:

dial-peer voice 20 voip

destination-pattern XXXX

session protocol sipv2

session target ipv4:

session transport tcp

dtmf-relay rtp-nte

codec g711ulaw

no vad

The Trunk on CCM is simple:

- Call Classification - OnNet;

- MTP - checked;

- Destination Address - IP on CCME;

- ports - 5060, 5060, TCP, 711ulaw;

- significant digits - 4;

Let me know if need more help.

c.fotia Fri, 10/05/2007 - 00:00


I've configured my SIP connection between CCM 4.2 and CCME 3.3 like well-descripted in precedent posts. It's work fine in CCM->CCME direction (call from CCM IP Phone to CCME IP Phone is established and voice quality is good). In the reverse condition (making a call from CCME to CCM) the call is not established. I've already checked the CSS on trunk and above there is the CCME dial-peer configuration:

dial-peer voice 2001 voip

tone ringback alert-no-PI

destination-pattern 2....

session protocol sipv2

session target ipv4:

session transport tcp

dtmf-relay rtp-nte

codec g711ulaw

no vad

Any hint?

Thanks in advance


hbarrera2 Fri, 12/07/2007 - 13:14


I am also trying to do the exact same thing, question...since I am going over the clients VPN what should the firewall portion look like? I know they have the fixup protocol enabled for voice?


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