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New Contributor

Call Forward no RTP

Hi,

The NV 6310 serve as a Gateway bewteen my ISDN-PRI and IP- PABX.

However, the user encounter no RTP when do a Call Forward to external via the ISDN.

Example:

1) Ext 3336 did a Call Forward external to a Cell Phone (9822XXXX).

2) I use my cell phone (9855YYYY) dial in to Ext 3336 via the ISDN-DID

3) Incoming call is connected to my cell phone (9822XXXX).

Problem:

1) During the call Forward process, the (9855YYYY) is unable to hear any ringing tone.

2) When Cell Phone (9822XXXX) answer the call, both cell phone users unable to hear each other.

I attach my config file.

thank you.

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Honored Contributor
Honored Contributor

Re: Call Forward no RTP

If the ISDN leg is attempting to transfer by releasing the PBX, you need to allow 2-b-channel transfer under the ISDN configuration.

interface pri 1

  isdn supplementary-service tbct

  isdn supplementary-service tbct notify-controller

This is for NI-2 switch type.  Your example configuration shows an E-1 interface so you are likely not using NI-2.  For other switch types it may be either of the following:

interface pri 1

  isdn supplementary-service rlt

interface pri 1

  isdn supplementary-service ect


Gory details in this document: 

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New Contributor

Re: Call Forward no RTP

Hi,

I add put in this command into my NV6310. But there is no voice path when the call is Call forward to external party.

Is there any additional command needed to configure the RTP?

Thank you

interface pri 1

  isdn supplementary-service ect

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Honored Contributor
Honored Contributor

Re: Call Forward no RTP

Capture:

debug isdn l2-f

debug sip stack messages

during a failed call attempt and paste the results here.  Preferably during a non-busy time. 

You might also try removing transfer-mode network from your trunk T02 configuration.

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New Contributor

Re: Call Forward no RTP


Hi,

I attach the debug for a test call.

IP address:
192.168.254.250- IP-PABX

192.168.254.30- Adtran Gateway (Model 640)
192.168.254.77- IPT (DN 2000)

Date tested: 9 June 2014
Time Tested: 14:43 Hrs

Call Forward All to: 9822XXXX (cell Phone)
DDI incoming to IP Phone: 66729171
Calling Party: 65160481

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New Contributor

Re: Call Forward no RTP

Hi,

I had attached the trace inside the support forum. Did you managed to

advice on my problem. Thank

On Jun 7, 2014 2:33 AM, "jayh" <adtran@adtran.hosted.jivesoftware.com>

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New Contributor

Re: Call Forward no RTP

Hi,

Is there any update on my issue?

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Valued Contributor
Valued Contributor

Re: Call Forward no RTP

Kongwc,

Please use the following guide as an example for your scenario, . Your configuration appears fine with the exception of the more specific accept templates needed.  Also, you should definitely upgrade the firmware to R10.9.4 as this is ADTRAN's current recommendation.  If there is still no audio on the call after the upgrade, you will likely need to troubleshoot this over the phone with someone in ADTRAN Technical Support.  You can open a ticket with ADTRAN by calling 888-423-8726.

Thanks!

David

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Valued Contributor
Valued Contributor

Re: Call Forward no RTP

Kongwc,


Were you able to resolve the issue?  Did the PSTN Gateway Guide help?  I'm going to mark this post as assumed answered, but feel free to post any additional questions you may have or any updates.


Thanks!

David


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