[Asterisk-Dev] TDM -- gaps in sound

[Brian Roy]

Please repost in user.

You'll need to change several settings on the Sipura (silence
suppression, echo cancel, etc...) in order to make this work.

Brian Roy


On Mon, 2004-11-08 at 13:45, Alexander Timoshenko wrote:
>     I've been trying to setup FAX'es using TDM card for a couple 
> days. For testing i have set up such configuration:
> 
> FAX <-> Sipura <-> */FreeBSD/TDM-FXO module <-> Sipura <-> FAX. 
> Sender ----------------------------------------------> Receiver
> 
> Codec was G711u. This configuration worked in about 20-30% of 
> transmitions. So i generated solid signal and send it through TDM to
> sipura and recorded it. 4 minutes of signal had 5 gaps 0.1-0.3 seconds
> long. I've tried several configurations to make sure that it was not 
> network congestion or Sipura's flow. The latest one was Asterisk, TDM
> with connected FXO and FXS ports. Signal had the same faults. This
> effect reproduces on my linux box as well. So could it be the reason 
> why faxes were failed to send?  Thanks in advance.
> 
> PS I wrote this to dev- because thought it could be driver issue. Sorry if
> i was wrong.