Panasonic ISDN PBX and ISDN in general

[mR_Slug]

I've been interested in some of the later PBXs with ISDN to the telco. I've got some Cisco routers that I understand can be the telco. This is something that's interested me for a bit but there doesn't seem to be much info out there.

I would like to know if any of the later PBXs have support for pulse and will work with old phones. It doesn't *have* to be Panasonic.

I'm trying to get a pulse phone to make a call via a PBX to another PBX/telco via digital ISDN. I'm also interested in getting an 128K ISDN modem connection. It would be great to have a full PRI T1/E1 connection, broken down into ISDN BRI, then terminate that to modems and a PBX.

I'm just curious about this stuff and want to preserve it before it gets too hard to find all the necessary hardware. There's quite a few PRI and BRI PBXs kicking about. Can anyone assist?