Priscilla Oppenheimer wrote: > > 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.
The large NO might be a bit mis-placed. ;-) Yes, you connect a phone to a router's FXS port. That's not because the phone is a station, however. (That's what the NO referred to.) It's becaue the phone is an FXO device. FXS goes to FXO and vice versa. Yes a PBX connects to a router's FXO port. The PBX uses an FXS port in this case. From the PBX point of view, it's connecting a phone. Makes sense right? What do PBXes connect? Phones. From the router's point of view, the router is getting dial tone, etc. from the PBX. The router is an FXO in this case. The router interface is labeled with what it is, as mentioned. OK, I will stop writing messages on this topic. I should just turn my computer off. ;-) Priscilla > > > > > 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=54363&t=54331 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
