FXS is a station (end device)
FXO is a trunk line
Haakon Claassen
EMEA - IT Transport Services -WAN
Cisco Systems
De Kleetlaan 6b - Pegasus Park
B-1831 Diegem (Belgium)
-----Original Message-----
From: Chuck's Long Road [mailto:[EMAIL PROTECTED]]
Sent: vrijdag 27 september 2002 18:11
To: [EMAIL PROTECTED]
Subject: OT: FXO FXS terminology - comments? [7:54331]
Someone smarter than I made the following statements about FXO / FXS, in
order to help me understand real world connectivity.
That person said to think of FXO / FXS as something analogous to DTE /
DCE.
That is, DTE connects to DCE ( and visa versa ) and that FXO connects to
FXS
( and visa versa )
In other words, an analog telephone set is an FXO device, and therefore
plugs into an FXS port. The FXS port provides the signaling to the FXO
device.
Similarly, a PBX, or a CO switch, for that matter, is an FXS device that
provides signaling, and therefore plugs into an FXO port.
This seems to fit in with what I know - that you connect a router to a
PBX
or to the telco CO switch via an FXO port, and you connect an analogue
fax
or telephone into a router FXS port.
Any comments? Reasonable way to think of things?
Thanks.
Chuck
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=54347&t=54331
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