Incoming calls ring but cannot be answered

[DarrenR]

Hi guys,

Currently have my OBi100 set up to use localphone for outgoing calls and a number routed through to a pbxes.org sip address for incoming calls.

Outbound calls work fine, however inbound calls ring, but cant be answered. I pick up the handset and press the answer key, which stops my phone ringing, but I just get silence. The person calling me meanwhile continues getting a ringing sound that eventually drops to voicemail.

This set up works fine on a sip app on my android phone. Any ideas?

The call history shows that it does connect - although it certainly doesn't seem to.

Thanks

Darren

[N7AS]

If you disable SIP ALG on your router, it should fix the problem.

[DarrenR]

Thanks very much, couldn't find an option in my router to disable it, there was a long convoluted method of telnetting into it and disabling it but it would reset when the router restarted. Firmware update has added it as a menu option and it now remains consistent.
Thanks again.