Looking for a solution to forward calls from one extension phone (only). In this case, there are four extension phones on the phone line. Sandman's site has some "hot dialers" that will dial a programmed number when the line goes off-hook. But they seem to grab the line if *any* extension is picked up. Does anyone know if there are any dialers that will only trigger when one specific extension is picked up?

Are you trying to FORWARD INCOMING calls directed to one extension to an outside number, or have one extension be an OUTBOUND HOTLINE phone? If the latter, a hotshot dialer, or an old SmarT-1 dialer would do the job. Also check Viking Electronics.

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?

hey JME, please fill out your profile for us. Thanks.

Here's one possibility:

https://www.vikingelectronics.com/products/hotline/k-1900-5.html

Looks like it connects serially, so it shouldn't affect any other extensions on the line. Now, can it dial before the datalogger kicks in and starts dialing?