2b DTMF issue with Asterisk

Comment on asterisk settings HKBN 2b
tpenguin
Joined: Thu 28 of Apr, 2005

Re: 2b DTMF issue with Asterisk

Posted:Tue 23 of Jan, 2007 (11:50 UTC)
Hello CK,
My IP500 is using rfc2833 when i started to use it. But i cannot use rfc2833 in 2b trunk
Thanks,
tillama
Joined: Thu 15 of Dec, 2005

Re: 2b DTMF issue with Asterisk

Posted:Sun 21 of Jan, 2007 (03:16 UTC)
Hi, tpenguin,

You need to set your phone as well.
Refer to your manual and check how to config IP500 to send DTMF by rfc2833 instead of inband.
tpenguin
Joined: Thu 28 of Apr, 2005

Re: 2b DTMF issue with Asterisk

Posted:Mon 15 of Jan, 2007 (04:28 UTC)
Hello CK,
I am using asterisk 1.2.13 and the IP phone is Polycom IP 500. I have tried add dtmfmode=rfc2833 into sip.conf, and also in peer configuration, the result is same. So, I think 2b does not support rfc2833. The problem is when I am using dtmfmode=inband to connect between asterisk and 2b, If I dial the digits quite fast, the far end side receive not correct digit. I am sure asterisk has received the digits properly, but seems that asterisk did not sent it out the digits one by one in inband mode. For example, the mobile phones (GSM or 3g) will relay the dtmf digits and then send it out one by one, so i think asterisk is not doing that.
Thanks,
Lai
tillama
Joined: Thu 15 of Dec, 2005

Re: 2b DTMF issue with Asterisk

Posted:Wed 03 of Jan, 2007 (01:24 UTC)
hi, tpenguin, make sure 2b uses dtmfmode=rfc2833, and your SIP device uses also dtmfmode=rfc2833.

You need to specify it in sip.conf and the device configuration. What SIP device are you using?
tpenguin
Joined: Thu 28 of Apr, 2005

2b DTMF issue with Asterisk

Posted:Tue 31 of Oct, 2006 (07:21 UTC)
I am using codec g711, dtmfmode=inband. When i call a outside number through 2b, the DTMF cannot be sent properly. I need to press the key very slow and longer. I have tried to set dtmfmode=rfc2833, it worst than inband and nothing will be received by destination. Anyone know the solution? Thanks,