This has always been confusing to me. I think that the phone would be considered a station and should be an FXS device, while the upstream connection (thinking of Central OFFICE here) should be an FXO. :-) But that would be backwards from how it really is. I think. If I were to install Cisco VoIP gear right now for someone I'd probably order the wrong modules and have everything connected incorrectly.
John >>> "Chuck's Long Road" 9/27/02 10:11:09 AM >>> 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=54333&t=54331 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
