SIP INFO DTMF Digits '*' and '#' are not sent correctly

[summitraj]

I am using SIP INFO for DTMF digits using 3CX Phone ver. 4.0.10373.0

The digits '*' is sent as Signal=10 and '#' is sent as Signal=11

Is it a standard way to send the value of DTMF digits. Other SIP Phones send them as DTMF characters as follows

Signal=#

Signal=*


Looks like a bug.

 

[SY]

I am using SIP INFO for DTMF digits using 3CX Phone ver. 4.0.10373.0

The digits '*' is sent as Signal=10 and '#' is sent as Signal=11

Is it a standard way to send the value of DTMF digits. Other SIP Phones send them as DTMF characters as follows

Signal=#

Signal=*


Looks like a bug.

What is specified in content-type header?
What are the "Other SIP Phones"?

Thanks

 

[sebastiao.salviano]

Hello !!!

I've the same situacion with the my server, in the tranfer for the my server the digits are sent with 10 when i used the *. For the correctly transfer the 3CX need to send * for my server. Is there some thing modify the send of digit * ?

 

[SY]

Hello !!!

I've the same situacion with the my server, in the tranfer for the my server the digits are sent with 10 when i used the *. For the correctly transfer the 3CX need to send * for my server. Is there some thing modify the send of digit * ?

What is the server you are using?
Thanks

 

[rick_it_2004]

SIP INFO isn't a standard, each telephony server is free to implement SIP INFO support for DTMF in their own way. The only "standard" is RFC 4730, using KPML as a event package. This is supported by Cisco but not by many other vendors as they don't like Cisco ideas generally.

 

[summitraj]

Content-Type: application/dtmf-relay

 

[odf]

I do not understand, please can tell me what part I need to check this, on the phone or on the 3CX?

 

[LeonidasG_3CX]

You would have to configure this correctly on the phone.