I’m trying to setup a SIP trunk for the first time, and will be completely honest in that I’m greatly lacking in knowledge specific to SIP. I've been working on and off for this setup over the last month and resolved several issues but at the same time have this in a no way working state. Any help that can be provided would be extremely appreciated.
Setup as follows:
PBX: IP Office 500 V2 (9.0)
Firewall: Netgear ProSafe 336Gv2 (updated to latest firmware)
SIP Provider: Gamma
The Netgear is configured to forward 5060 UDP from the SIP provider IP to the IPO. The SIP ALG setting on the device is disabled.
Before I go into the problems, I will note although I know that opening up the firewall rules to allow connections from any IP or to allow additional ports such as 6000-40000 is not a secure solution, I have tested these things just to see if my issues resolved but they still remained.
STUN reports my firewall type as Full Cone NAT. It has been noted elsewhere that Gamma do not provide a STUN server, and I have been using stun.l.google.com.
I do suspect the firewall as being either part of or the whole issue because if I place the IPO onto a direct connection for testing purposes the SIP lines function correctly.
I am wondering (although this is only guess work) if the SIP URI details I entered may be having an impact, simply because I got these from another IPO that was setup and is working on Gamma, but this working one is on a direct connection to the SIP provider.
The issues I experience are as follows:
• Calls received have one way audio (cannot hear the external caller).
• Call forwarding back out via the same SIP provider fails.
• There may also be an outstanding issue of line busy on attempted outbound call, but I want to resolve the above issues first (particularly the one way audio issue) before I re-evaluate.
From previous reading I can also confirm that we have VCM32 module as well as two combo cards, and I have tried reseating these into the IPO.
Any help with the above would be greatly appreciated. We have number portings from the current ISDN connections scheduled for 28/04, and although I can put these back with the provider I'd prefer not to lose more weeks for the next available date.
Setup as follows:
PBX: IP Office 500 V2 (9.0)
Firewall: Netgear ProSafe 336Gv2 (updated to latest firmware)
SIP Provider: Gamma
The Netgear is configured to forward 5060 UDP from the SIP provider IP to the IPO. The SIP ALG setting on the device is disabled.
Before I go into the problems, I will note although I know that opening up the firewall rules to allow connections from any IP or to allow additional ports such as 6000-40000 is not a secure solution, I have tested these things just to see if my issues resolved but they still remained.
STUN reports my firewall type as Full Cone NAT. It has been noted elsewhere that Gamma do not provide a STUN server, and I have been using stun.l.google.com.
I do suspect the firewall as being either part of or the whole issue because if I place the IPO onto a direct connection for testing purposes the SIP lines function correctly.
I am wondering (although this is only guess work) if the SIP URI details I entered may be having an impact, simply because I got these from another IPO that was setup and is working on Gamma, but this working one is on a direct connection to the SIP provider.
The issues I experience are as follows:
• Calls received have one way audio (cannot hear the external caller).
• Call forwarding back out via the same SIP provider fails.
• There may also be an outstanding issue of line busy on attempted outbound call, but I want to resolve the above issues first (particularly the one way audio issue) before I re-evaluate.
From previous reading I can also confirm that we have VCM32 module as well as two combo cards, and I have tried reseating these into the IPO.
Any help with the above would be greatly appreciated. We have number portings from the current ISDN connections scheduled for 28/04, and although I can put these back with the provider I'd prefer not to lose more weeks for the next available date.
