No DTMF over IP trunks, why?

[AvayaEng]

Hi

I have two S8500B + CM3 + G650 + TN799 + TN2602 connected with an IP Trunk. When I call from a 4601+ on Switch A to a 4601+ on switch B, I press the dialpad for DTMF but the user on Switch B cannot hear the DTMF tones.

If I call for an anlagoue phone on switch A to a 4601+ on switch B the user on switch B will hear the DTMF tones.

My signalling group is set ot In-band and I have tried out-band aswell.

Please help?

thanks

 

[Doyaya]

This is normal, Medpro doesn't provide DTMF tones to IP Phones.

Doyaya

 

[4merAvaya]

Try changing the 'Calls share IP Signaling Connection' on the IP Trunk Signaling Group form to 'y'.

Kevin

 

[AvayaEng]

Hi

thansk for tips. 4merAvaya, did that no luck.

This could be a serious problem for me.

 

[skara]

We had the same problem and escalated the fault to Avaya. They resolved this issue with a software patch.

 

[nohuhu]

AvayaEng,

check the "dtmf over ip" field for the signaling group used for this trunk, it should be set to "out-of-band". also it wouldn't hurt to set "intra-system ip dtmf transmission mode" to out-of-band to make sure it isn't lost during codec conversion.

 

[AvayaEng]

Hi dwalin.

In intra-system ip dtmf transmission mode I have in-band or RTP-Payload only.

thanks