[Asterisk-Users] RTP Codec Error(s) - Is there really a solution for this or these?

Tilghman Lesher tilghman at mail.jeffandtilghman.com
Wed Dec 10 23:26:55 MST 2003


On Wednesday 10 December 2003 23:15, Steven Thomas wrote:
> Hi All,
>
> I have add the below error ever since installing and running with *
> for the past 6 months.  It only occurs on calls from * to a H.323
> gateway.  I am using chan_h323.
>
> I have searched HI and LOW for a solution within the archives and
> elsewhere.
>
> When the error presents on the console - there is a millisecond pause
> in the active voice call........ . . . .
>
>
> NOTICE[1265529664]: File rtp.c, Line 418 (ast_rtp_read): Unknown RTP
> codec 19 received
> NOTICE[1265529664]: File rtp.c, Line 418 (ast_rtp_read): Unknown RTP
> codec 19 received

First, the solution:  the provider needs to turn off Comfort Noise.
Second, the vendor of the product needs to update their equipment to
use the RIGHT codec number for Comfort Noise, which is 13.  RTP 19 has
been reserved (i.e. deprecated) for several years and SHOULD NOT BE
USED.

-Tilghman




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