Double dtmf tones passed to UA

ipfreely · Post by **ipfreely** » Thu Jun 30, 2011 7:51 pm

1. Brekeke Product Name and version: sip server

2. Java version:

3. OS type and the version: win2008r2

4. UA (phone), gateway or other hardware/software involved:

5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/ ... terns.html :

6. Your problem: I have a sangoma net border gateway with pri's connected to the brekeke sip server. The sip server is used to supply sip trunking. I am getting double dtmf tone when the call is passed to a remote Pbx vis sip trunk. I have confirmed that net border is sending dtmf as required RFC 2833. Can I change the way sip server sends dtmf tones? If so how is it done?

taitan · Post by **taitan** » Fri Jul 01, 2011 9:47 am

Do you want to get single DTMF tone instead of double DTMF tones?
- or -
Do you want to convert RFC2833 signal to a DTMF tone?

Which PBX product are you using??

ipfreely · Post by **ipfreely** » Fri Jul 01, 2011 9:56 am

I need to get the single dtmf tone. The product I am using as the UA is an NEC SV8100. They only support inband DTMF on SIP Trunks. The double DTMF is causing an issue with inbound calls to the UA's Automated Attendant.

hope · Post by **hope** » Fri Jul 01, 2011 3:09 pm

brekeke pbx can send inband dtmf, brekeke sip server cannot convert rfc2833 to inband dtmf.

taitan · Post by **taitan** » Tue Jul 05, 2011 12:10 pm

Brekeke SIP Server doesn't modify DTMF signal. It means the SIP Server doesn't cause the double DTMF problem.

Let you clarify the problem.