What kind of paging units can be used on these systems? We got one installed recently and our old paging which uses 24vdc horns was not connected to this system. The company brought a new 70 volt system and said it was the only thing that would work for this. I looked at the programming documents for the paging set up and it does not say anywhere that you have to use a 70v paging system. Does anyone know for sure what can be used?

Someones BS'ing you. If it worked before you connect page out to the audio tip/ring with the proper connector. Maybe a matching transformer. They obliviously don't know Jack.

Yes, a WMT1A will allow for any paging system to conenct to the IPO and an analog port.

The rest (what codes you use etc) depends on teh programming

So what is a WMT1A? Does this do the answering so that the page can be made?

Either 1 should work, ,,Wmt1a is bogen matching tranformer with with adjustment on it,, can't remember ,, high impedance ,yada,yada,google it. you may not need it.

It doesn't "answer" the single line station port. When you program a S/L port for loudspeaker page, it doesn't ring anymore. There's just audio when you page, and no audio when you aren't paging. You couple this into the input of your amplifier or self amplified horns. The key is the impedance of that input. If it's not around 600 ohms, the station port will return a busy signal when you access it, so you need the WMT-1A matching transformer to couple things together. Or a trick is to put a 680-ohm resistor across tip and ring of the analog station port (programmed as a loudspeaker paging port).

If you leave the single line port programmed as an analog station, then it still rings, and you need a centrex-paging adapter that trips on the ring (like an answering machine) and couples the audio to the input of the amplifier.

Last option is to use a trunk port, but then you need something to provide talk battery to the IP Office, and couple the audio to the input of the amp.

Only the station port programmed as a loudspeaker paging port can be utilized for simultaneous paging, through speakerphones and loudspeakers.

To connect to an analog trunk port you can use a (wait have to blow the dust off of it) Bogen Tam B with a 24 volt transformer to provide talk battery. There's some of these out there branded Avaya as well. Just pay attention to the dip switches, and if memory serves me correctly there was a relay in there that would occasionally fall out of the socket and cause issues.
John