[Simon2007]

Hi - This is my first post and I am very new to the voip world.

This seems a great forum and I wondered if anyone can help me with the following?

My set up = SPA9000, SPA400 and Three SPA942's. All are on a switch attached to a port on my router. Nat enabled.

All have the very latest firmware upgrades and I used the Linksys wizard to set them up.

Voip works perfectly, I can make and recieve voip calls fine. However PSTN does not work as expected. I can make one successful outgoing PSTN call, but that is all. A second outgoing PSTN call fails and I hear a long tone. If I reboot the SPA400 I can again make just 1 successful PSTN call.

When I make the successful PSTN call and hang up, the SPA400 correctly places that line (line 1) back On-Hook.

Things I have tried. Force media proxy -yes on SPA9000. NAT mapping enable and NAT keep alive to “Yes” on all the SPA942 and line 2 (PSTN Line) of the SPA9000. Tried setting the SPA9000 IP address as DMZ host on the router in case it was a port issue, but this made no difference.
I have experimented a little with the voice settings on the SPA400, but am not 100% sure whether it is a UK regional setting issue or not as I can make that 1 successful call?

Any thoughts would be appreciated. As a newcomer to SPA equipment, the options are quite daunting.

[Simon2007]

I know I am replying to my own post, but thought I would let others know I have solved this outgoing PSTN problem.

I am in the UK and have a business highway phone line. Although it has two analogue line sockets (which work perfectly with my ordinary phone system) it is basically an ISDN product.

I tried my whole system (SPA9000,SPA400 and SPA942's) on an ordinary analogue PSTN line and my outgoing call problem disappeared.

I hope that this post may help others experiencing a similar problem.