[asterisk-bugs] [JIRA] (ASTERISK-27848) RFC4733 DTMF Breaks When High Frequency Codecs are Offered

[Dominic (JIRA)]

Dominic created ASTERISK-27848:
----------------------------------

             Summary: RFC4733 DTMF Breaks When High Frequency Codecs are Offered
                 Key: ASTERISK-27848
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27848
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_rtp_asterisk
    Affects Versions: 15.4.0
         Environment: CentOS 7 based FreePBX/SNG 7 Distro running on a KVM based virtual machine

Linphone Android and Linphone Windows softphones
            Reporter: Dominic
            Severity: Minor


This is my first issue, so apologies if I didn't fill everything out quite right.

I've been running into an issue where RFC4733 DTMF fails (the other side of the call doesn't recognize digits are pressed) when high frequency codecs are offered in the initial SIP INVITE.

If I enable a codec in my Linphone settings that uses a frequency greater than 8000 Hz (e.g. speex, opus, etc.) even if that codec is not negotiated, DTMF fails.

Apparently, Asterisk doesn't support telephone-event/16000, but simply having that codec present in the INVITE SDP shouldn't prevent telephone-event/8000 from working.

More details and server logs are available here: https://community.asterisk.org/t/help-debugging-rfc4733-dtmf/74602



--
This message was sent by Atlassian JIRA
(v6.2#6252)