SPA942 cuts off voice randomly

[etrauma01]

Hi everybody,

I am using a Linksys IP Phone SPA942 in the office and when I'm talking on the phone or dialing a number my phone just decides to cut off the voice randomly. Apparently the person on the other side of the line hears me fine, it's just me not hearing them. I tried switching phones but didn't help. I work in a healthcare company and it's really frustrating to ask patients to repeat all their complaints because you couldn't hear them! I would appreciate any help in this regard.

[Dan Lukes]

Unless it is broken device then it is network problem. Either NAT or statefull firewall decide not to allow packet to flow from outside to phone.

Catch packets on the wire - if you will see uninterupted bidirectional flow of RTP packets, then phone is broken, if packets dissapear in one direction then network is wrong.