H323 Trunk Between CUCM and CME

Unanswered Question
Nov 12th, 2009

Hi All,

I'm having some issues setting up an H323 trunk between Call Manager 5.1 and CME 7.1. The CME router is connected back via a VPN tunnel within the router back to the ASA at HQ. So far I have setup the h323 gateway on the CCM using the IP of the CME router with a Route Pattern using that Gateway. On the CME side I setup the dial-peer and voice service voip as follows:

dial-peer voice 5000 voip

destination-pattern [5678]...

session target ipv4:

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad




voice service voip

allow-connections h323 to h323

allow-connections h323 to sip

allow-connections sip to h323


When I call from CCM to CME, the calls go through fine, though from CME to CCM, I get a busy after about 10 seconds. When I do a debug voip ccapi inout, it shows that the call goes through the correct dial-peer, though I get an error cc_api_call_disconnected: Cause Value=38.

I've been racking my head trying to figure this one out without any success, so any help would be greatly appreciated.



I have this problem too.
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mightyking Thu, 11/12/2009 - 18:12

Make sure you have the following statement on the FastEthernet interface of the CME:

h323-gateway voip bind srcaddr 10.10.x.x


ryan_bell Thu, 11/12/2009 - 18:18

Your awesome, that did the trick. One other question relating to this. How would I go about having the display name of the CCM user's phone display on the CME phone? Currently the CME phone's name appears on the CCM phone, but not the other way around.

Again thank you much for the above command.

mightyking Thu, 11/12/2009 - 19:36

Check the IE option in the H.323 gateway configured in the CCM. Also in the CME verify the following:

At the voice service level:

voice service voip


h225 timeout ntf <50-5000>

h225 display-ie ccm-compatible

At the voice class level:

voice class h323 1

h225 display-ie ccm-compatible [system]

h225 timeout ntf <50-5000>

interface Serial0/3/0:23

no ip address

encapsulation hdlc

isdn switch-type primary-ni

isdn incoming-voice voice

isdn map address *. plan isdn type unknown

isdn supp-service name calling

no cdp enable

You may need to upgarde the IOS in order to get access to those commands.



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