Customer has a an old paging system that requires a talk path and a control lead.This worked before on a nortel pbx paging card but now we have taken that away and put in a 2821. What card do I need to interface with the paging system. I am pasting the requirements that the paging system is looking for.
1. Page audio: 0 dbm, 600-900
2. Page Control: âAâ contact, nor. Open
3. Monitor: 48 volts dc nom. 1200 ohms max. source/line resistance
Will a standard e&m card work or is something else required?