[Asterisk-Users] Newbie setup (Hardware questions)

[m. smadi]

if you are going to use SIP phones (either software or hardware) then 
you won't need FXS.  You will need FXO modules to connect you to the 
PSTN (i.e. to the outside world).  FXS is used so you can hook POTS 
phones to them the PBX (POTS meaning your regular phone the ones you 
most likely have at your house and as such)

this link is an ok document explaining the different

www.patton.com/technotes/*fxs*_*fxo*.*pdf

hope this help

moe smadi
*Puddle wrote:

>Hello, I'm trying to setup an Asterix PBX solution in
>our office.
>
>We plan to have 5 active lines open available at any
>point in time.
>
>We'd like to use VoIP Phones, and possibly Software
>Based phone (*NIX/Windows enviroment).
>
>I was researching the various cards and I think I'd
>want to go with the Digium TDM40B - 4-port.
>
>However, I can't figure the differences between FXS &
>FXO to make a decision of a purchase.
>
>Could someone help explain this?
>
>Ideally, we want to have one main line and have it hit
>a directory then branch to each work area with a
>phone.
>
>Thanks,
>
>-Puddle
>
>
>
>
>		
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