Chan_dahdi.c: Don’t Know What To Do With Frame Type ’10’

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Asterisk Users 2 Comments

Hello!

I see large enough amount of such messages on one of our asterisks. There are no complains from users, so I may be they are harmless. Could you tell me what can it be?

Thank you!

2 thoughts on - Chan_dahdi.c: Don’t Know What To Do With Frame Type ’10’

  • Frame type ’10’ is a CNG (Comfort Noise Generation) frame. This is a frame that, instead of carrying audio, carries a command to for the receiver to generate “comfort noise” for a length of time to the local user.

    chan_dahdi is not currently capable of generating comfort noise in response to receiving one of these frames.

    I think it’s safe to ignore them. Alternatively, if the comfort noise packets are generated from SIP endpoints that you have control over, you could see if there are any options to disable generation of those frames.

  • Hello!

    Thank you!

    I accidentally deleted you messages, so I just copied it from mail list archive, this will break thread 🙁

    Today I found that we receive such frames during call to/from mobile phones, so these messages are really harmless.