Well, I took the plunge and have it working...sort of. I have a pair of wireless G radios running between A&B and another pair between A&C, point A being the only location where we have PSTN lines. I initially started with three radios (one at each point) running in ad hoc client mode. While I could see the computers and phones at each end, the only place I could get any of the phones to register with the base was at the location where the D-Link base station is located (A). The remote side phones would configure, but never register. I ultimately turned the network around and went back to a client and access point mode. This is when I installed the 4th radio and made each leg independent from the other. I established the access point ends at the remote sites (B & C) with the client side at point A. I can now get one phone to register and operate at each end (B & C) as well as a number of phones at A (where the base is located).
What has me puzzled is that when searching for an additional phone at either B or C, no phone will show up in the RP administrator. If I try and ping the phone, it will not respond, but looking at the configuration of the phone itself reveals that it did pick up an address from the DHCP server. I even tried with another phone that was working at location A, but once at B or C, the system will not find them nor can I ping them. I can ping and control any of the other phones that have already been resgistered, so it seems unlikely that it is a firewall or other system issue.
Any suggestions? I will play around some more with it, but quickly running out of ideas.
Thanks in advance.
Larry