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

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

PABX CCM Route Optimisation

Hi,

I have the following setup.

Siemens PABX - VG30D DPNSS/QSIG Converter - 2811 MGCP GWay - UCM V7.1.3 Cluster

The scenario is:

IPT Ext 8100 and 8101 are in a Call Pickup Group.

PABX Ext 2000 calls IPT Phone Ext 8000. Ext 8000 transfers call to an IPT Phone Ext 8100. Ext 8100 rings and the Ext 8101 uses Group Pickup to answer call.

The call is connected, however after 13 seconds Ext 8101 is disconnected. The originating PABX Ext 2000 now hears ring tone.

Debug ISDN Q931 on the Gateway confirms that a disconnect is received from the PABX.

PABX traces confirm that when the call is picked up by IPT Ext 8101 the PABX sends an optimisation message (110B), however this is being rejected by the Call Manager message (54).

Any suggestions would be appreciated.

thanks

Ian.

5 REPLIES
Super Bronze

Re: PABX CCM Route Optimisation

Hi

There are a few things to consider here...

As I recall, DPNSS pretty much has one way of requesting this feature.

CCM has some service parameters that control it the QSIG equivalent (under the CAllManager service parameters).

In your VG30D there will be settings to enable Route Optimisation on the DPNSS side, and path optimization on the QSIG side, and some other settings... so there are a few places where you might need to change settings.

So - are you sure that it's CallManager rejecting the connection? PBX-guy will say it is, but you have the VG30D in between which you also need to consider. Does that have the feature enabled on both trunks?

Have you checked the traces on the CallManager side?

Aaron

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
New Member

Re: PABX CCM Route Optimisation

Aaron,

Thanks for the feedback.

I have checked the VG30D and can confirm that Route Optimisation is enabled by default.

Ian.

Super Bronze

Re: PABX CCM Route Optimisation

Hi

And on the Q.931 services side? Enabled there too?

Did you take a look at the logs on the CallManager?

Aaron

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
New Member

Re: PABX CCM Route Optimisation

Aaron,

Yes also enabled on the Q931 side.

Unfortunately I will have to schedule a site visit to gather traces.

thanks

Ian.

New Member

Re: PABX CCM Route Optimisation

Hi

Did you ever get this resolved as we have similar issue

Cheers

Simon

417
Views
0
Helpful
5
Replies