[Asterisk-Users] Diffrence bewteen FXO and FXS

[Shaoul Jacobson - TELLINK]

Hi,



FXS card  = plug to regular phone

FXO card = plug to phone line


The trick I use is:
FXO with a 'O' as in Office.
This is where you plug your phone
A FXO card emulates a phone (receives power)


FXS with 'S' as in (public) Switch
This is the part that gives power
A FXS card emulates a switch (gives power)


Plugging 2 FXS elements together is not a good idea
Plugging 2 FXO elements together will not work but no problem otherwise


Shaoul Jacobson
Senior VoIP Consultant
Tellink
Tel :	+32 3 201 96 36
Fax : 	+32 3 227 09 81
e-mail	shaoul at tellink.com