Question:

I bought a used PBX full duplex speakerphone. I wonder if it's possible to use at home with digital phone service. Is there a converter of some kind from digital phone to PBX?

My Scientific Atlanta WebStar cable modem has two phone lines out. The cable guy installed something that allowed one line out to be used on my regular phone: It looks like a regular phone jack that only uses two wires from the cable modem. I wonder if I can use the cable modem to connect directly to the speakerphone, which says it's capable of doing computer VOIP?

Answer:
My Scientific Atlanta WebStar cable modem has two phone -lines out. The cable guy installed something that allowed one -line out to be used on my regular phone: It looks like a regular -phone jack that only uses two wires from the cable modem. I -wonder if I can use the cable modem to connect directly to the -speakerphone, which says it's capable of doing computer VOIP?

This one is way too easy.  Sure there is.  It's called a PBX.


It's unlikely that a full duplex PBX phone will work as a stand alone unit, so it looks like you bought a new paperweight.  

If you're looking for help on finding equipment to support this phone, it would seem that you might take time in your two posts to name the make and model of the phone you're trying to interface, but that's just good journalism.

Of course, you might look into the stand alone conference phones that are full duplex from manufacturers like Panasonic, Clear One, and Polycom.  Expect to pay hundreds of $$$, but it's probably less than a PBX for your phone.