Valcom tech support said that the correct device for this application is their VIP-821A, which provides the FXO port the V-2901A is looking for and interfaces that to SIP. I've purchased one but am having trouble getting it registered on RingCentral. I added it as an existing device and got the SIP settings required by RingCentral, but the Valcom uses different terminology and has additional settings that aren't mentioned by RingCentral.
The SIP settings that can be configured for the Valcom are:
Phone number -- I think this is the RingCentral SIP User name
Authentication Name -- I think this is the RingCentral SIP Authorization ID
Secret -- I think this is the RingCentral SIP Password
Realm -- I've tried leaving this blank, the RingCentral SIP Domain. and my internal domain
Primary SIP Server (name and port) -- this must be the RingCentral SIP server & port
Register (check box) -- I assume this should be checked
DNS SRV (check box) -- if I uncheck it, spaces for three additional SIP servers appear)
outbound proxy & port -- this must be the RingCentral SIP outbound server & port
RTP port -- no idea
Idle Timeout (secs) -- defaults to 0. I tried it at 40, still doesn't register
Max Call Timer (secs)
CID number -- no idea
CID Name -- no idea
Auto Destination - no idea
The network settings look pretty straightforward but one I'm not sure about is SIP SDP NAT -- a text box which is empty by default. I assume that NAT should be off so empty is appropriate.
Has anyone successfully connected this Valcom device or another Valcom SIP device to RingCentral & could offer configuration advice?