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sleek · 03-27-2009, 11:48 AM

The source of your problem could emerge from variety of circumstances.

1. It could be bad internet connection. Your modem/router/ISP may simply be failing at one point causing connectivity problems for your ATA.

2. What's also important is the type of NAT your router implements for the devices connected behind it. If your NAT is symmetric, STUN will NOT help you. Only outbound proxy will.

3. If you are experiencing problems as it is, you might want to create port forwarding from your router for the designated ports of your ATA. One port for the registration/auth. to take place and the second port for RTP/voice packets. Implementing port forwarding eliminates symmetric NAT-ing and will likely turn in it to Full Cone Nat which will 'open the door' for your phone adapter to communicate with the SIP server much easier.

03-27-2009, 11:48 AM	#3
sleek Member Join Date: Dec 2008 Posts: 54 Thanks: 2 Thanked 5 Times in 5 Posts	The source of your problem could emerge from variety of circumstances. 1. It could be bad internet connection. Your modem/router/ISP may simply be failing at one point causing connectivity problems for your ATA. 2. What's also important is the type of NAT your router implements for the devices connected behind it. If your NAT is symmetric, STUN will NOT help you. Only outbound proxy will. 3. If you are experiencing problems as it is, you might want to create port forwarding from your router for the designated ports of your ATA. One port for the registration/auth. to take place and the second port for RTP/voice packets. Implementing port forwarding eliminates symmetric NAT-ing and will likely turn in it to Full Cone Nat which will 'open the door' for your phone adapter to communicate with the SIP server much easier.