Sadly, I inherited a VoIP solution to dial tone that interfaces with a Fire alarm system. Spectrum converted the dial tone to VoIP and I added two VoIP lines via a Grandstream box. It puts out 47 volts at 26mA. The alarm system hates the lower voltage and everybody is pointing fingers at my lines. Yet, the Spectrum line puts out 50 volts at 40mA!

Sandman says that the specs are 23-120 mA and if your equipment fries, it was too high. Nobody seems to mention what to do about low voltage and low current, except for the 46222 (an old Proctor staple LLA) that is way too expensive and rare.

If you have an old ATA lying around, can you read the voltage? My Linksys PAP 2T is a candidate. It puts out 49 volts at 21 mils. I'm trying that one today.

Carl