From: Dave Gingrich (Dave@xxxxxxx)
Date: Fri May 19 2000 - 00:34:05 GMT-3
At 05:13 PM 5/18/00 -0700, you wrote:
>I have question, I think FX0 can only be connected to
>the C0 line, E&M is used for PBX, but you mentioned
>that FXO can be used to connected to PBX, then under
>what situation you want to do that in stead of using
>E&M?
There are exceptions but generally...
FXS port - outbound calls, cause the connected device to ring (ring out)
FXS port - inbound calls, receive digits (dial in)
Think of an attached telephone, a call TO the phone rings, a call FROM the
phone involves dialed digits.
FXO port - outbound calls send digits (dial out)
FXO port - inbound calls receive ringing (ring in)
Think of a phone line, CO Line or PBX extension (connected to the FXO port)
Inbound calls ring; outbound calls digits are sent.
E&M ports, both inbound and outbound receive or send digits (2-way dial)
If two PBXs both support E&M tie lines, (special E&M trunk interfaces are
required) then E&M would generally be the preferred method of
connection. Often though, one or both PBXs does not support E&M, therfore
you may have to use some combination of FXO/FXS ports.
=====================
Dave Gingrich, K9DC
Indianapolis, Indiana
Dave@dcg.org
=====================
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