>>> Since you don't mention which device
I do not understand what you mean.
The ipDatatel was connected to an Ademco I am replacing with the Elk M1.
It was connected with 6 wires: 4 in parallel with the keypads (2 for power and 2 for data in/out, terminals 4/5/6/7 on the Ademco), and 2 on the tip and ring (terminals 23/24 on the Ademco). All matching to the lower 6 connectors on the ipDatatel (-, +, Rx, Tx, Tip, Ring, respectively)
So this is why I assumed it was going to be the same set of connections.
If it make a difference, the ipDatatel is monitored by AlarmRelay.
RV