Call Mgr H323 Question

[kronos74]

I am following the h323 configuration setup for connecting cucm 4.2 to avaya using the following document:

http://www.avaya.com/usa/resource/assets/applicationnotes/ip-trunk-cm.pdf

The document makes no mention of dial peers on the router side so will this configuration work without them? I have 4 mgcp gateways and wanted to add 1 h323 gateway. The only dial peer in the router is:

dial-peer voice 1 pots
service mgcpapp
port 0/0/0:23

All configuration is done through cucm for the mgcp gateways but am unsure about the h323 gateway setup. Any help would be appreciated.

 

[whykap]

If you are using ip trunks on the avaya side then the router is not in the picture. read this link.
If this is not what you are trying to do explain in detail your set up and how you are connecting the two systems.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/pbx/interop/notes/430317av.pdf

 

[kronos74]

Yes, that is exactly what i'm doing, trying to connect cucm to avaya over an ip-wan. So after configuring both sides based on that document, when I dial I get a fast busy. I have run the dial plan analyzer and everything is going where it’s supposed to so I’m thinking Callmgr isn’t seeing the ip of the avaya side. Any way to test this, trace the call from the callmgr side? Since I’m not using the routers to dial, I’m stuck as to how to troubleshoot and I have tried various different settings to no avail.

 

[whykap]

Are you sure that faststart and media termination point are checked on the gateway configuration?
Have you reset the gateway?
Can you ping the AVAYA gwy from the call manager and vice versa?

I have implemented this and it works. Unfortunately there is no ts tool on the ccm side to see where the call is failing live. There might be some traces but I don't know off hand.

What happens when you call from the AVAYA side? The AVAYA has a screen that shows you the calls on the ip gwy real time.

 

[kronos74]

The answer to all your questions is yes. A trace on the avaya side shows the call hitting the correct trunk but the call still fails, fast busy. The avaya pbx has more than 1 clan card, would it matter which one is chosen?

 

[whykap]

I would think it matters which ip address you choose. The call manager server has to register with the AVAYA to route calls. If it's not you will get busy signals.

Try and register with the correct clan.

 

[kuttikattukunnel]

I would like to know the status when you dial it from avaya side.

Also make sure you do not check "MTP required" on the H323 gateway configuration page.And correct CSS to reach this gatewy.

HTH
Tom

 

[ABHC]

We have a ring down system at our HQ that connects to channel banks / FXS cards at the far end. The FXS are analog phone lines like the phone company delivers to your home. Several far end users are taking the FXS output and connecting it into a Cisco Routers FXO port so they can extend the circuit. Works OK but there is a disconnect supervision issue. We have an opportunity to add a Supervisory disconnect tone on a new system we are purchasing but I am not sure what the frequency and cadence should be for most applications.

Does anyone know of a standard?

Does the disconnect sup tone only work with an H.323 gateway?


THX

 

[kronos74]

The reason for my problem was due to a channel issue on the avaya side of the configuration. I found out that to run a trace from the cucm you go to cucm serviceability, trace configuration & choose the callmgr service. Open the file it downloads to your pc and search through it for the errors. Test calls revealed that no channel was available on the avaya side when a call was made to it so channels were increased and issue was resolved. Thx whykap for your help.