Thanks for answering. Should have had my coffee before posting.. & then I might have left you enough details to try and help me.

I am looking to have just the one POTS ext be an OUTBOUND hotline phone. The actual application is a customer with an expensive datalogger that is programmed to make a modem call once a week to a specific number. The dial home number has changed but they can't reprogram the datalogger to use the new number. If they would put it on it's own POTS line or PBX ext, it'd be easy, but they move the datalogger around to different sites.. always using POTS lines that have multiple sets on the line.

My first thought was to use an old smart1 dialer as you suggest. But it gets better, they don't know how to force a call from the datalogger either, so for the moment I don't even know what number the datalogger is trying to call. Makes it harder to set up the routing table. I was hoping to just use a hotline dialer to redirect the call. But all of the hotline dialers that I have used would grab the line when any extension set goes off hook. So when Joe Officeworker picks up his POTS extension the hotline dialer will also kick in. There must be a (series installed) hotline dialer that will trigger off the downstream device only (datalogger) and ignore other POTS sets on the line that also go off hook from time to time?