From: Scott Morris (swm@emanon.com)
Date: Thu Oct 16 2003 - 15:40:49 GMT-3
An easy way to look at it:
FXS will supply dialtone to the device, FXO requires dialtone to be
supplied by something else.
If your phone system is able to use ANALOG equipment (e.g. fax machine),
then it has an FXS port (supplying dialtone) which can connect to a
router's FXO port (needing dialtone).
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
CISSP, JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Thursday, October 16, 2003 2:25 PM
To: Group Study
Subject: Voice Ports
Hi,
To connect a telephone key system that doesn't support E&M interfaces to
a router which type of vic should be used, FXS or FXO?
I understand that FXS ports are used to connect to analog phones and fax
machines and that FXO ports are used to connect to the PSTN, by I'm not
sure about small key systems.
Also, in the lab, besides FXS vic's, are either FXO's or E&M vic's
present?
Thanks, dt
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