priller
join:2000-10-20
Gainesville, VA
 ·voip.ms
·Callcentric
·Vonage
·callwithus
2 edits | reply to artisticcheese
Re: How multiple ATAs can be behind same NAT router?
Your VoIP provider's SIP proxy knows the address and port you registered from, so it just sends the INVITE to you on that port.
In my example above, the INVITE comes to me on 1061 ... is translated back to 5060 and is passed along to the ATA.
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Please don't screw with port forwarding. If for some reason you have a problem receiving calls, the problem is that the NAT translation in your router is timing out. This is resolved by adjusting the timeout in your router. If that isn't an option, then request that your provider increase the registration interval or enable NAT keepalive on the ATA. |
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artisticcheese
join:2004-11-09
Carrollton, TX | I hear first call ringing but when I pick up I hear dead air. What most likely cause for this? I have 2 different VOIP Providers behind router and both of those use SIP UDP 5060. |
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JTS33
join:2003-05-03
USA
| reply to priller
said by priller  :Your VoIP provider's SIP proxy knows the address and port you registered from, so it just sends the INVITE to you on that port. In my example above, the INVITE comes to me on 1061 ... is translated back to 5060 and is passed along to the ATA. -- Please don't screw with port forwarding. If for some reason you have a problem receiving calls, the problem is that the NAT translation in your router is timing out. This is resolved by adjusting the timeout in your router. If that isn't an option, then request that your provider increase the registration interval or enable NAT keepalive on the ATA. Router: Airlink101 AR430W SuperG Wireless Router
ATA: Linksys PAP2 v1 flashed to SPA1001, STUN enabled.
My Internet connection is Dynamic IP, and I noticed when my ISP assigns me a new IP address, registration to GizmoProject would fail and I would not get any incoming calls.
Using the "DHCP Release" and "DHCP Renew" functions in the router to force a new dynamic IP, I spent a day messing around with the ATA settings, and registration would still always fail when my WAN IP changed.
Then I figured out that if I rebooted the router after the WAN IP address changed, GizmoProject registration did not fail.
Just curious if there is a technical explanation of what may be causing this?
Is it partially due to something on GizmoProject's end, or is it solely my router? |
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