[comp.dcom.telecom] Two Wire vs Four Wire Subscriber Line

peppers@uunet.uu.net> (04/06/91)

I have a question for which I hope that more knowledgable people in
telephony can assist me with!

What is the difference between a two wire subscriber line and a four
wire subscriber line?  That is to say, if I am a cellular switch owner
and don't know a lot about cellular but my management staff does, how
do I go about making an informed decision on the selection of two wire
vs. four wire subscriber lines coming into and out of my switch?

What are the advantages of using two wire subscriber lines coming into
the switch?  What are the advantages and disadvantages of using four
wire subscriber lines?  Is the decision made based on the direction of
the trunk circuits (Inbound , Outbound or Two-Way Trunks)?

Please advise, anyone!

Thank you,


Gerald Peppers

usenet address: !motcid!void!peppers