[comp.dcom.telecom] Plain Ol' Telephones.

ronp@tslwat.uucp (Ron Pfeifle) (07/05/90)

What happens on a two-wire telephone line when a call is being
completed in terms of the two wires?  I'd like a description like:

The CO signals such-and-such across the wires.  Because of
this-and-that the telephone rings.  When the receiver is picked up,
A-and-B happens which tells the CO that the phone is off-hook.  At
this point voice out goes through wire blah, voice in comes through
wire bleh, etc..

I just want to know what such-and-such, this-and-that, A-and-B etc...
are for a two-wire subscriber line in terms of signals on those wires.

Thanks,

Ron Pfeifle : Teleride Sage Ltd : Waterloo, Ontario : watmath!tslwat!ronp