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New Member

Mobile Voice Access with MGCP Problem

Hello,

A customer has a CUCM 7.1.5 and 2911 VG with PRI line. It works excellent with MGCP.

I was asked to enable Mobile Voice Access. I 've made all the appropriate configuration but it doesn't work.

On the debug isdn q931 I get the Unallocated/unassigned number message.

The call flow is:

-The provider send me 3 digits

-I send them on the CUCM where I have configured 2 Gateways. The mgcp that used to work and a new H323 (with the IP address of gig0/0 of the mgcp)

-On both gateways I put a prefix "1" because all the internal number are 1XXX

The mva number is "1400".

I have configured 2 dial-peers:

dial-peer voice 44 voip

service mva

session target ipv4:xxxxxxxxxxx

incoming called-number 400

codec g711ulaw

!

dial-peer voice 45 voip

destination-pattern 400

session target ipv4:xxxxxxxxxxx

codec g711ulaw

!

I remember that I had configured mobile voice access with mgcp to a customer with BRI lines and was working fine.

I don't know what is going on here.

All CSS and Partitions are configured correctly.

It seems like the call is "captured" first by the mgcp.... I don't know..

Any ideas?

27 REPLIES
New Member

Mobile Voice Access with MGCP Problem

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/6_1_1/ccmfeat/fsmobmgr.html#wp1169257

Could you show all of the dial-peers from the router?

Also, include a 'debug isdn q931'

TwD

New Member

Mobile Voice Access with MGCP Problem

These are all the dial-peers. I don't think I need more.

it's an mgcp gateway

Green

Mobile Voice Access with MGCP Problem

Hi,

Reading about this.

Your call comes in to the CUCM because the PRI is backhauled via the MGCP.

You will need to hairpin it back to the H323 gateway part of the router.

If you build a translation pattern that the I/C MGCP gateway can access then tranform the called digits back to 400

Build a route pattern and point at the H323 gateway.

PSTN ---> PRI--> MGCP--> CUCM ---> H323 GWAY --->MVA APP

Regards

Alex

Regards, Alex. Please rate useful posts.

Hi derveniss and fvazquez,

Hi derveniss and fvazquez,

 

Was you able to solve your loop issue

I have MVA with MGCP and I'm testing by calling from internal IP Phone and enter the destination number and PIN then entering the required number to reach then #

 

Then I hear the welcome message again ?

 

I tried internal and external numbers for the number to reach but with the same result

 

Did you figure out what is the issue for this loop

 

Thanks

 

 

Cisco Employee

Mobile Voice Access with MGCP Problem

Gateways and Ports

Only H.323 gateways get supported for Mobile Voice Access.

Mobile Connect features do not get supported for T1 CAS, FXO, FXS and  BRI.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_1_2/ccmfeat/fsmobmgr.html#wp1203108

Do you have 2 separate T1s/E1s???

One for MGCP and one for H323???

When you configure the timeslots you bind that to either MGCP or leave it for H323/SIP. You cannot have a mix of MGCP and something else on same pri-group.

HTH

java

If this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
New Member

Mobile Voice Access with MGCP Problem

Hello and thanks for the replies.

I had made this work on my lab. The only difference was that I used BRI line.. but it was also controlled by mgcp.

On the customer's gw there are some BRIs but are with mgcp too

New Member

Mobile Voice Access with MGCP Problem

I made this work on my lab..

Well, not exactly...

I listen the "Welcome" message.

I enter my remote destination number..

I press my pin

I press "1" in order to make a call

It prompts me to press the number I want to call

I press the number

But after the "#", I listen again the first "Welcome" message

Afterwards even if I press again my remote destination number nothing happens.. and after a while, the line drops

New Member

Mobile Voice Access with MGCP Problem

Cheers to all,

All the critical problems were solved.. MVA and mobility works fine.

But I have a final issue..

Because of the trick with the route pattern, the system recognizes the "1400" as a remote destination number and not my mobile were I have confiured.

So the user has to enter its remote destination number every time..

Can we avoid this? Is there a way to make the system recognize the very first calling number (etc my mobile) and prompt immediately to press my pin?

New Member

Mobile Voice Access with MGCP Problem

Any help?

Mobile Voice Access with MGCP Problem

Check out this discussion we had before about MVA and follow it's steps and concepts

https://supportforums.cisco.com/message/3463924#3463924

Hope this help

If helpful rate

New Member

Mobile Voice Access with MGCP Problem

First of all i have to mention that I have created Dial Rules and and I put the prefix "9" in all incoming calls.

I did that because I don't want to put "9" on missed callls...

Here is a very strange problem.

When I put as a remote destination my mobile 6944123456, on the debug voice ccapi inout I see as cisco-username the 96944123456. Of course it doesn't match with my mobile and it asks me to "enter my remote dest number..."

When I put as a remote destination my mobile in that way: 96944123456, on the debug I see as cisco-username the DN 1381 which the Line DN I have associated with my remote destination profile!!! Of course it doesn't match..

It is very weird, right??

New Member

Mobile Voice Access with MGCP Problem

Things are going good now..

But I have a final (i hope) problem.

I press "1" to make a call, I press the number I want to call (internal or external) and I hear the message "your call cannot be completed as dialed"..

What I have to check? Is it a CSS problem??

Thanks

Mobile Voice Access with MGCP Problem

Most likely a CSS issue

HTH

plz rate the helpful posts

New Member

Mobile Voice Access with MGCP Problem

Yes but which CSS??

When I change the css of the H323 gateway (incoming css) I have a diferrent behaviour.

I listen again the Welcome message.

But it used to work,..

New Member

Mobile Voice Access with MGCP Problem

Hello derveniss, I know this post has a lot of time, but I was wondering what did you make in order to correct your issue.

I have some kind of similar problem, on debugs appears as unallocated number,

I listen the "Welcome" message.

I enter my remote destination number..

I press my pin

I press "1" in order to make a call

It prompts me to press the number I want to call

I press the number

But after the "#",

Afterwards nothing happens.. and after a while, the line drops

My scenario it's a little bit different.

3rd vendor PBX (Nortel)--> E1 CAS --> ROUTER 1 --> h323--> ROUTER 2 (vxml APP)-->h323--> CUCM

Thanks in advantgae for your help

New Member

Mobile Voice Access with MGCP Problem

please?

Re: Mobile Voice Access with MGCP Problem

If you login and reach the virtual profile then check the " calling search space" on the RDP. THis is the CSS that is responsible for letting you call via MVA.

New Member

Mobile Voice Access with MGCP Problem

The calling search space at the remote destination profile is correct.

But I noticed the above:

The calling search space at the h323 gateway (incoming calls) contains a CSS with ONLYone partition. The partition P-MVA which is the partition of the mva number.

If I add on this CSS any other partition I have the following: when I press the number I want to call and then #, I listen again the initial "Welcome" message..

Can this help?

New Member

Mobile Voice Access with MGCP Problem

anybody?

New Member

Mobile Voice Access with MGCP Problem

Hello people,

any update for this?

ty

New Member

Mobile Voice Access with MGCP Problem

Here I am again..

I must check this configuration on the customer.

I have 2 issues..

The problem now is that the system does not recognize the remote destination number.. I really dont know why..

On service parametes i have checked the Complete Match...

Is there any debug on the router or is there any other way to see the whole call flow with the calling/called party at each leg?

In which part the system compares the remote destination which in the database with the calling number from the pstn?

Mobile Voice Access with MGCP Problem

Hi,

kindly you need to change under call manager service parameters you need to change  from complete to partial match.

HTH

Anas

please rate if it is helpful

New Member

Mobile Voice Access with MGCP Problem

Thanks for the reply.

I have just found out from the debug voice ccapi inout on the vg that the system sees the 1381 as calling number and perhaps that's why it does not recognise it as my regural remote destination.

1381 is my internal directory number and I have associated it with the remote destination profile..

Why, how and when it transforms my remote destination number with my internal directory number?

New Member

Mobile Voice Access with MGCP Problem

anybody?

Re:Mobile Voice Access with MGCP Problem

Hi

i have reviewed the questions and answers. I found that your main issue is solved. the final issue is matching your remote destination number.

My recommendation first to debug dialpeer on voice gateway to check the sequence of matched dialpeers. after that change the MVA to pots dialpeer instead of voip, also change the incoming-called number to match the mva DID. also make sure that you configure partial match under call manager service parameters.

HTH
Anas

please rate if it is helpful

Sent from Cisco Technical Support Android App

New Member

Mobile Voice Access with MGCP Problem

Hello and thanks fore the reply,

I cant understand why, how and when the system transforms the original calling number (my cellphone number which is the remote destination) with my directory number....

This is the reason the system does not recognize the remote destination...

any ideas?

Cisco Employee

I am finding this post after

I am finding this post after many years, I don't know if you figured this one out or not.

But the answer below:

This is a limitation of this set up:

 

  • Mobile Voice Access gets configured in hairpin mode. (When Mobile Voice Access that is configured in hairpin mode is used, users who are calling the system do not get identified automatically by their caller ID. Instead, users must manually enter their remote destination number prior to entering their PIN number.)

 

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmfeat/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100_chapter_0110111.pdf

 

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