[Asterisk-Users] WARNING[1264581056]

[Jeremy McNamara]

Sudhir Kumar wrote:

> I have configured my GS HT-486 for "send dtmf" in audio, and on the
> asterisk box, sip.conf has dtmfmode set to inband. Everything seems to
> be working fine, however, I see my console get flooded with the
> following warning:
>     "dsp.c:1467 ast_dsp_process: Unable to process inband DTMF on 256
> frames"
> 
> Should I be cautious about them or just ignore? Better still, what
> should I do so that these warnings are not generated.


First off, upgrade your Asterisk code. That error message is quite a bit 
more friendly now (not to mention all of the other improvements :)

Secondly, inband DTMF does not work on G.729 (or 256 in Asterisk's terms)


*CLI> show codecs
Disclaimer: this command is for informational purposes only.
         It does not indicate anything about your configuration.
           1 (1 <<  0)  G.723.1
           2 (1 <<  1)  GSM
           4 (1 <<  2)  G.711 u-law
           8 (1 <<  3)  G.711 A-law
          16 (1 <<  4)  G.726
          32 (1 <<  5)  ADPCM
          64 (1 <<  6)  16 bit Signed Linear PCM
         128 (1 <<  7)  LPC10
         256 (1 <<  8)  G.729A audio
         512 (1 <<  9)  SpeeX
        1024 (1 << 10)  iLBC
       65536 (1 << 16)  JPEG image
      131072 (1 << 17)  PNG image
      262144 (1 << 18)  H.261 Video
      524288 (1 << 19)  H.263 Video


Jeremy McNamara