Guys,
I want to make voip call from LAN/softphone to PSTN across ISP network, which block all voip ports. Do you think below network setup can accomplish my goal? Can I bypass NAT router/ ISP firewall by putting SIP Proxy between ISP and SIPserver to perform NAT traversal?
[PSTN]—-(FXOgateway)—-{Router}—-(ISP)—-{Router}—-(SIPserver)—-[LAN]
Thanks for all your inputs.
hkl
