[Asterisk-Users] What's the difference?

[Lyle Giese]

The orginal use for these was to extend dialtone over a channalized T1
between towns.  In the old days, businesses would buy phone numbers in a
different town/phone exchange and port it to their offices.  This was way
before call forwarding was popular or practical dues to long distance rates
at the time.

At the orginating end, we would put in a Foreign eXchange Office channel
unit and wire it to the local dial tone port on the telco switch.  At the
other end, we would put in a Foreign eXchange Subscriber channel unit and
wire it to a cable pair that went to the business that purchased that out of
town(or Foreign eXchange) dial tone.

An FXO gets dial tone from somewhere and the FXS faces the subscriber
equipment/phones/stations.

Lyle

----- Original Message ----- 
From: "Jonathan Miller" <webmaster at accs.net>
To: "'Asterisk Users Mailing List - Non-Commercial Discussion'"
<asterisk-users at lists.digium.com>
Sent: Thursday, September 30, 2004 6:56 PM
Subject: [Asterisk-Users] What's the difference?


>
>
> Say, what's the difference between a FXO and FXS port?  Are either or
these
> for incoming (POTS) lines or are they for phones/stations?
>
> Sincerley,
>
> Jonathan Miller
> ACCS.net
>
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