380.57 on N66U: problems with voip/sip phone

[merl]

Switching to 380.57 on my N66U and my voip/sip phone stopped working. The phone just said "registration failed" If is just a gigaset ip phone connected via a statically assigned IP with no port forwarding.

I couldnt see anything which might be causing the phone to fail to register with the ISP.
Switching back to the previous version (378.56_2) it started working again (but that version has some SSH issues :-( )

Anyone seeing similar problems?

Other details: SIP provider Bahhof.se ; phone: gigaset C510 using a nonstandard high numbered port as advised by gigaset with this model of router.

 

[SomeWhoCallMeTim]

I have a Cisco voip/vpn phone as well as a voip phone using a Grandstream voip adapter . Haven't had any issues on 380.57.

Switching to 380.57 on my N66U and my voip/sip phone stopped working. The phone just said "registration failed" If is just a gigaset ip phone connected via a statically assigned IP with no port forwarding.

I couldnt see anything which might be causing the phone to fail to register with the ISP.
Switching back to the previous version (378.56_2) it started working again (but that version has some SSH issues :-( )

Anyone seeing similar problems?

Other details: SIP provider Bahhof.se ; phone: gigaset C510 using a nonstandard high numbered port as advised by gigaset with this model of router.

 

[merl]

Changelog for
380.58 (20-Mar-2016)
includes something which might be the cause:

- FIXED: Diasbling the SIP NAT helper would also drop all port 5060
traffic. Some users need to keep the SIP helper disabled
with their SIP client. Reverted that GPL 858 change.

Not tried it yet but may give it a go...