> Try ANSI/EIA/TIA/ RS-496. Sorry, I don't have a copy. Recommend that you select one of these two:
ANSI T1.401-1993 Interface between Carriers and Customer
Installations
Analog Voicegrade Switched Access Lines Using Loop-
Start and Ground-Start Signaling
ANSI T1.405-1993 Interface between Carriers and Customer
Installations
Analog Voicegrade Switched Access Lines Using Loop
Reverse Battery Signaling
Either one will provide the information you're looking for.
Ciao,
Vic Boersma
