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New Member

Voice IP call Transfer problem

I have a CallManager cluster version 5.1.3( one publisher and one subscriber)and a gatekpeer at center site. 3 remote site with a PBX at each site.

At center site, when calls come from PSTN, Transfer call is good. But when call come from remote site, calls can not transfer.

When Call between remote sites, transfer call is good.

Any one can tell me the problem ?

Thanks

9 REPLIES
Cisco Employee

Re: Voice IP call Transfer problem

if using H323 you need an MTP for the site that cannot transfer calls. that happens when an MTP cannot be allocated

HTH

javalenc

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
New Member

Re: Voice IP call Transfer problem

Thank you for your support.

But i don't understand why we need an MTP ? I have a voice gateway 3845 to connect to PSTN.

How can I implement an MTP ?

New Member

Re: Voice IP call Transfer problem

Hi javalenc

The Cisco IP Voice Media Streaming Application service has active. But the transfer call still doesn't work.

what can I do to resolve this problem ?

Cisco Employee

Re: Voice IP call Transfer problem

Make sure the gateway has access to the MTP, if you have it but the GW does not have access to it, it's as good as have it shutdown

you can go thru the SRND to understand more on MTPs, basic you need to know is that h323 cannot change the connection and you need an MTP to do so

HTH

javalenc

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
New Member

Re: Voice IP call Transfer problem

Thank you for your supported!

But I don't known after active The Cisco IP Voice Media Streaming Application service. Do we have configuration in Gateway to access to the MTP or any other configuration on CCM.

VIP Super Bronze

Re: Voice IP call Transfer problem

When you activate the Cisco IP Voice Media Streaming Application service, the following components are automatically created.

1. ANN ..Annunciator

2. MTP..soft ware MTP

3. CFB...software conference bridge

4. MOH..Music On Hold

What you need to do, is create a MRG, assing these devices to the MRG.

You then need to create a MRGL, assign the MRG to it.

You will then assign your Gateway to the MRGL you created.

That way your gateway will have access to the Software MTP

Please rate all useful posts "The essence of christianity is not the enthronement but the obliteration of self --William Barclay"
New Member

Re: Voice IP call Transfer problem

Hi aokanlawon

I have create MRG, MRGL and assign my gateway ( H323 GW) to the MRGL. But the transfer call still doesn't work.

What can I do next ?

Re: Voice IP call Transfer problem

Actually, you need to assign this MRGL to the device pool in which your phone resides, and then reset the phone!!

go look under the phone and check the device pool. Then go to that device pool and assign the MRGL. Lastly reset the phone to have the changes take effect! All should be well then!!

HTH,

Chad

New Member

Re: Voice IP call Transfer problem

Dear all

I have add MRGL to device pool and reset the phone, device pool. But it is still does't work.

Any other configuration ?

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