I have a linksys spa 2102 connected to my bt home hub, to give me an extra geographical voip line. It works fine for incoming calls but I am unable to get any out going calls on it. I am sure it is a port forwarding problem.
Has anyone a similar set up?

I forgot to say I still have the BB talk set up, could there be a conflict somewhere?

any help appreciated.

Which SIP port is the SPA-2102 configured to use? It has to be different from whatever the Home Hub is using (likely to be 5060). This is the port the device listens on, not the port the SIP proxy uses (which is almost always 5060). If you have multiple SIP clients behind a router, each needs to use a different port. The port number doesn't matter, you just have to make sure it's unique. Most people go sequentially and use the next port (5061).

Also you need to make sure the RTP port range on the SPA-2102 is again different from the Home Hub.

i used to use a linksys pap2 which is similar but i thought pap2's wont log in anymore to the sip servers on BT Talk anymore ?

i dropped back to the 10v adapter with my 3com router when this happened. i ran my pap2 till jan when bt made changes to the sip servers.

Thanks both for the replys, I dont use the linksys for BB talk, I have geographical number (01***) sipgate set up on it.
I will check the settings over the weekend and let you know.
Not sure what the RTP range is of the hub, anyone know?