[asterisk-users] How to connect asterisk PBX to PSTN

[Sebastian]

On 10/14/2010 03:09 PM, Gopalakrishnan A.N wrote:
> Hi Joshi,
>
> To connect with PSTN line you need FXO / FXS card. FXO is used to
> connect CO line and FXS is used to connect internal station line. With
> help of FXO you can connect the outside world and with help of FXS you
> can connect normal analog phones. Inspite of normal analog phones you
> can connect SIP phones (soft phones) also.

Actually to connect PSTN lines (regular telephone lines coming from your 
telecom provider) to Asterisk you only need FXO cards. Or ATA's 
(analogue telephone adapters) - specially if your Asterisk box doesn't 
have PCI or PCI-e slots. The FXO cards can be PCI or PCI-express (or 
other flavours for more complex setups) with 1-8 (or even more) 
connectors per card for the same number of telephone lines to be 
connected to Asterisk. Digium, Sangoma, OpenVox and others make them.

You only need FXS cards if you have analogue phones which you want to 
re-use. Otherwise there are many manufacturers of SIP hardware phones - 
looking perfectly similar to regular business desk phones - so there 
isn't much point IMO to buy FSX cards unless you already have the 
analogue phones and need to re-use them.

Sebastian


Some vendors are there for
> these PSTN cards like Digium, Sangoma, Openvox.
>
> Good luck....:)
>
>
>
> On Thu, Oct 14, 2010 at 7:05 PM, Jigar Joshi <jigarjm at gmail.com
> <mailto:jigarjm at gmail.com>> wrote:
>
>     Hello community,
>
>     I have successfully set up asterisk free PBX server and I am also
>     able to connect to it by softphone.
>
>     Now as next step I want to extend this to PSTN ,
>
>     My Required scenario:
>
>     I need a number which will connect outside PSTN world to my PBX and
>     by applying extension particular softphone or connected normal phone
>     should get connected.
>
>     Which hardware I need for it.
>     Also please explain a bit of dial plans.
>
>     Thanks
>
>
>
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> Thank you  with regards,
> Gopalakrishnan A.N,
>
>