Thread: Nokia Support
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Unread 06-27-2007, 10:54 PM   #97
nokuser
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Quote:
Originally Posted by martin View Post
The problem is that the inbound INVITES are not getting a reply. I can only assume that for whatever reason the IP address/port that was used for registration is closing down after a certain amount of time.

As we are not getting any reply messages for the INVITE it makes it hard to determine the underlying cause.
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I think for security reasons ISP firewall is closing down the port that was used for registration after a certain amount of time. When I change in nokia e61 the connection "Always on" --> "When needed" --> "Always on", the port opens again for about 20-30 seconds and I can receive inbound calls. I have no problems with incoming calls using nokia e61 as a modem and X-lite on my PC with same ISP.
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