[Asterisk-Users] Delay on calls

[Steve Davies]

On 6/7/06, Marnus van Niekerk <m at mjvn.net> wrote:
>
>  I have a 1.2.4 * box with two HFC modems using chan_modem_i4l and several
> SIP phones and ATA's.
>
>  We have a terrible delay on calls between the PSTN (isdn BRI) and the SIP
> phones.  All internal calls are fine.  My first thought was that the
> transcoding could cause the delay but all of the SIP phones default to ulaw
> so there should not be any transcoding needed.
>  I also checked the load on the server and it is well below 10% cpu
> utilisation and load average of below 1.

Is there some form of jitter buffering going on? Perhaps the echo
cancelling (I assume there is some) is adding a significant delay?
Perhaps try turning it off temporarily. It seems likely to be related
to chan_modem_i4l if your internal calls are all okay.

Cheers,
Steve