VM, SRST with DTMF tones

Unanswered Question
Jan 28th, 2009

I have phone trying to access remote vm via pstn while in srst. I can see through the debug dialpeers, that my dtmf tones are sent inband, and are appended to the called number for vm access. When the call is hairpined back out, it does not carry the calling number, therefore, it shows up to the unity server as the BTN, not the individual DID. is there a clid command i am missing?

I have this problem too.
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testeven Wed, 01/28/2009 - 12:05

Hi!

You need to use out-of-band DTMF tones in order for Unity to detect them. Configure 'dtmf-relay h245-alphanumeric' on the voip dial-peers that point to Unity.

HTH!

Regards,

Teresa.

balitewiczp Wed, 01/28/2009 - 12:12

thanks for the info. This is a pots dial peer, as the unity server is remote from the phone and will be accessed via the pstn

testeven Wed, 01/28/2009 - 16:21

Here's what I found:

http://www.cisco.com/en/US/products/sw/voicesw/ps2169/products_configuration_guide_chapter09186a00806674d3.html

This issue is encouneted with PRI as the redirecting party number is not carried end-to-end and can be lost by the time it reaches the site that has the Unity. Some of this is documented in the following bug which is more like an enhancement request: CSCed68039

If the RDNIS is not conveyed by the ISDN, the only option is to send the RDNIS somehow (check CSCed68039) that introduced a command in IOS to be configured under the outgoing pots dial-peer:

dial-peer voice <> pots

clid override rdnis

Once you do this, you can see that the RDNIS is conveyed in the calling party number on the "debug isdn q931"

I believe this solution needs a script to extract this info and send it to Unity, but I'm not very familiar with it.

Probably you can contact TAC for more info about this.

Hope this helps & good luck!

Regards,

Tere.

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