I did some quick looks into a couple of books I have to see what they say.

Scott Keagy's book "Integrating Voice and Data Networks" has nothing to say
about FXO and FXS in particular.

The "Cisco Call Manager Fundamentals" book makes the rather brief assertion
that "FXS ports provide connection to loop-start or ground-start telephone
lines, ...  ( PBX ) ports, and other analogue telephone devices. FXO ports
provide connection to central office ports or PBX extensions"

Interesting wording, and seems to apply to what I was told.

Learn something new, some better way to think about things, every day.

Chuck




""Jennifer Mellone""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> That sounds great and makes more sense now! I always like reading your
posts
> :-)
>
> I always confuse which device plugs into which port. I remember it like
this:
>
> Plug phone or "Station" into FXS (where Station=S)
> Plug PBX/CO into FXO (where Office=0)
>
> - Jennifer




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