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9971 phone unable to complete PSTN calls

alexjr
Beginner
Beginner

Has anyone ran into this problem? I'm testing with a SIP9971 phone. In order to make PSTN calls we have to disable video on the device configuration page. When video is enabled, calls to landline work but no ringback. Local cell calls I get a busy signal. Long distance cell calls we get number cannot be completed as dialed from CM. All other models work fine. I'm thinking it fails because of what is sent in the Setup message or type being sent. Gateways are H323 with PRIs.

1 ACCEPTED SOLUTION

Accepted Solutions

Jaime Valencia
Hall of Fame Cisco Employee Hall of Fame Cisco Employee
Hall of Fame Cisco Employee

Go to the voice ports in the H323 GW and type the following command:

bearer-cap speech

Otherwise you'll send the SETUP with video capabilities and the call will fail.

HTH

java

If this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

View solution in original post

12 REPLIES 12

Nizar Abuseni
Cisco Employee
Cisco Employee

Hello,

Can you please provide us with the exact Call Flow? what phone dials what digit manupulation is done from CM, what gateway it match's, what codecs are used, is the gatewat remote site, gateway dial-peer config.

Also send us : debug voice ccapi inout  from the gateway.

Best regards,

Nizar

No digit manipulation is done at UCM. Gateway is local, H323. I'm attaching debugs and dial-peer config. In this case the number is an LD number. It is matching the LD dial peer.

Device pool is configured for G711 and G729. I also changed the phone to G711 only and it failed too.

Again, when video is disabled under Video Capabilities, it works fine.

I've highlighted the number I'm calling to.

Call flow

9971 reg on UCM -> Route pattern -> RL -> H323 gateways -> PRI group

Jaime Valencia
Hall of Fame Cisco Employee Hall of Fame Cisco Employee
Hall of Fame Cisco Employee

Go to the voice ports in the H323 GW and type the following command:

bearer-cap speech

Otherwise you'll send the SETUP with video capabilities and the call will fail.

HTH

java

If this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

Is this the only solution?

Jaime Valencia
Hall of Fame Cisco Employee Hall of Fame Cisco Employee
Hall of Fame Cisco Employee

That or as you've found to disable video capabilities.

HTH

java

If this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

Thanks Jaime!  I appreciate you making my Sunday in the office a short visit!  This worked great!

Nizar Abuseni
Cisco Employee
Cisco Employee

Hello,

I have checked the debug you attached. And i see the reason of disconnect is unassigned/unallocated number, which is caused because you are not sending the call type and plan. I have seen also there is another call which was sent successfully to the PSTN.

Now you need to check the following, when you disable the Video from the phone how is the debug looks like, and when you enable the video how it looks like also.

The failed one should look like this:

        Calling Party Number i = 0x2181, '7132076553'

                Plan:ISDN, Type:National

        Called Party Number i = 0x80, '19563690097'

                Plan:Unknown, Type:Unknown

The working one:

  Calling Party Number i = 0x2181, '7132076553'

                Plan:ISDN, Type:National

        Called Party Number i = 0x80, '19563690097'

                 Plan:ISDN, Type:National

I think your PSTN expect a proper Plan and Type from you.

Please let me know with the result of both calls.

Best regards,

Nizar

There is also an option to under the gateway to retry video as audio call. check that if it isnt already.

I had the exact same issue before and, as java pointed out, adding the "bearer-cap Speech" statement under the voice-port resolved it.

Java,

Had the same issue and your fix worked!!! Thank you

Chi Fai Leung
Beginner
Beginner

Wo~ Really work on this command ...

Why MGCP VG is no this issue?
But H323 VG have this issue?

VG(config)#voice-port 0/0/0:23
VG(config-voiceport)#bearer-cap speech

bearer-cap speech ... What is the meaning on this command?

http://docwiki.cisco.com/wiki/Endpoints_FAQ#Why_are_calls_from_my_video_endpoints_failing_to_the_PSTN.3F.3F

Regards

Deepak

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