Outbound calling works fine.
When I receive an inbound call, the phone rings, but when I pick up the phone, the conversation does not get established.
This seems like a routing or firewalling issue, but so far I have not found the solution.
I am connected to a cable ISP: the WRP400 gets the public IP address, but I could not find any routing/firewalling setting for the voice part.
A friend lent me a SPA-2012, and, with a totally similar configuration, inbound calls work on it. Also: incoming calls work on a softphone that I run on a computer in my local network.
I have tried to give back the router, assuming that it was defective, but even the new one behaves the same.
Can anybody help me, or point me to a previous thread where this issue was discussed and solved?
Thanks in advance.
PS: The firmware is 1.00.04.c I have not updated it, as the Linksys site offered it only in their USA site, and not elsewhere, and it did not specify whether the new version was suitable for european users.
PS2: I am attaching a log of a phone call attempt and the configuration of my VOIP part of the router.
I solved the problem together with the customer support of sipcall.
The solution was setting the "FAX Process NSE" on Line X to no.
Interestingly i had no problems on sip to sip calls. But pstn to sip didn't work.