CISCO IP 7940

I am trying set up a Cisco 7940 (sip firmware) with AASIP I have entered what I think are the correct setting in the SIP.cnf file but doesn't seem to be registering.

Edited by deleted (Sat 17-Mar-12 21:51:05)

Are you behind NAT?

If so you need to set

nat_enable:1

In your SIPDefault.cnf or the individual TFTP file for the phone.

thanks that worked. Not just cant get it to ring when receiving a call and can't hear any sound on speaker or handset once an out going call is connected

OK you may have a number of issues here.

Regarding the phone not ringing on incoming it may be because the phone is set to only re-register every 1 hour and the NAT binding is timing out. Set it to re-register maybe every 5 mins or less and retest.

If you are getting no audio this could be a port blocking or NAT issue. The above suggestion might fix this.

What router are you using and which ISP?

I am using a Draytek 2820 with Virgin Media (cable) and Vivaciti (BE Wholesale)

OK if the Draytek has a SIP ALG then turn it off.

Also check the ISP you are using are not blocking VoIP. Some do restrict it to their own offering from what I have seen.

Edited by deleted (Mon 19-Mar-12 15:57:28)

SIP ALG turned off
dont think ISP is blocking VoIP as I am able use it with a different phone/softphone

Can't really help anymore. Probably will need to get your provider to look at the SIP trace to diagnose further.