Reasons for no direct media in pjsip

Asterisk Asterisk SIP
1

Hi,
I want to work with direct media but I’m unsure which features disable it (so I can warn my clients accordingly).
Is there’s any comprehensive list on which features enabled either in PJSIP.conf or in the dialplan itself that prevent the channel from becoming direct media.
Thanks :slight_smile:

2

I experimented with it using fpbx - DTMF needed to be sip info and iirc follow-me could not be enabled

its not intelligent enough to distinguish sites with the same local network scheme , be aware …

3

dtmfmode is any of auto, inband, or rfc4833 AND

any of:

  • codecs mismatch;
  • recording call;
  • spying on call;
  • conferences;
  • any features.conf feature enabled;
  • any party refuses the re-invite;
  • directmedia=nonat, and NAT required.
1 Like
4

Local channels also prevent it, as does different packetization (one side does 20ms, the other side doesn’t).

1 Like
5

I’ve seen previous threads that claim that SRTP doesn’t support direct media. is this still the case?

6

Yes.

7

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