W70B Cross Talk

[glennbtn]

We have a number of customers using W70B with W73H handsets. Randomly some of these site with multiple handset (different extensions though) seem to join calls together ie cross talk.

I know these phones have the push to talk option which we always provision to off, but the handsets still suffer. Have tried putting the handset on different setting such as one on TLS and one on UDP but that made no different.

We can't see to replicate the issue and quite often a base reboot resolved but not always. Our supplier claim they have not heard of the problem before but I have seen on different forums that the issue exists.

All handset have up to date firmware, all run on freeswitch. It's as though the channels all link together, any advise or help here would be great