John Neiberger wrote: > > So, the FXS or FXO port on the router is labeled from the > perspective of > the device that connects to it?
NO. It's labelled as what it IS. In other words, a station > connects to > an FXS port? And a PBX connects to an FXO port? NO. > > This would be the opposite perspective from what they use when > labelling their cabling, which is always from the perspective > of the > router. > > This is all very confusing. :-( Either I'm continually > misunderstanding the examples or several of us have a major > misunderstanding when it comes to this stuff. Neither > situation is > good. > > John > > >>> "Bruce Enders" 9/27/02 12:23:28 > PM >>> > The simplest way I know of to explain these is to take the last > letter > (O or S) and associate that to where it will connect TO. So, an > FXO > connects to an Office (PBX or CO) and an FXS connects to a > Station > device > (Telephone, Fax, or answering machine). > As Chuck suggests, if you are connecting from an "O" it will > connect > to > an "S", and vice versa, just like DTE and DCE. (Remembering it > this > way > comes in handy when you are connecting two PBXs, or PBX to CO, > or > voice > gateway to PBX or CO). OBTW, that voice gateway is a > microscopic size > PBX. > Bruce > > Chuck's Long Road wrote: > > 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 > -- > > Bruce Enders Email: > [EMAIL PROTECTED] > Chesapeake NetCraftsmen o:(410)-757-3050, > c:(443)-994-0678 > 1290 Bay Dale Drive, Suite 312 WWW: > http://www.netcraftsmen.net > Arnold, MD 21012-2325 Cisco CCSI# 96047 > Efax 443-331-0651 > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=54358&t=54331 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
