T46G sound problem, interruptions

[cargotrans]

Hi everyone.

I have sound problems with a YEALINK T46G connected on an Asterisk 1.2.18 (Trixbox).
With external conversations it comes briefly again to short voice dropouts.

The other devices on the asterisk are only Snom360/370, and the sound problem occurs only on the Yealink T46G.
As codec we used alaw.

We would like to use the Yealink as substitute devices for the Snom, but with this problem we can't use in a production environment.

Is there anything I can do about the drop outs?

Thank you very much.