asterisk users - Oct 2009 - interfacing asterisk with a legacy PBX

I want to interface asterisk with a legacy pbx that has around 23 extensions
through my 8 fxs card, how do i work around this?
Hint: I have already terminated 8 extensions from the legacy PBX, i was thinking
whether i can peer the extensions from the PBX i.e like 5 extensions be peered
to one extension connecting to the fxs? How can i do this?

Thanks in advance,



      
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PATRICK KANGETHE wrote:
> I want to interface asterisk with a legacy pbx that has around 23
> extensions through my 8 fxs card, how do i work around this?
> Hint: I have already terminated 8 extensions from the legacy PBX, i
> was thinking whether i can peer the extensions from the PBX i.e like 5
> extensions be peered to one extension connecting to the fxs? How can i
> do this?
>
> Thanks in advance,
>
> ------------------------------------------------------------------------
Are you planning to get rid of the legacy PBX completely?  Or is
Asterisk going to be a second PBX?

I am going to assume you are replacing the legacy PBX.  You can setup
analog extensions so that you have multiple phones on each FXS channel. 
But they will be like a party line.  If you put 6 phones on one FXS, all
6 ring at the same time, only one person can use that extension at a time.

However you can add SIP phones to Asterisk and each can have their own
extension instead.  It just requires cat 5 cable back to a switch for
each phone.

Lyle Giese
LCR Computer Services, Inc.
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Your question doesn't seem clear on which way you have set up already.

Phone -> Asterisk -> legacy PBX -> one of the 23 extensions
Or the other way?

The capabilities of your specific existing PBX and asterisk need to be
matched up. With an FXS you could have the other end dial with DTMF a string
like *5551212#5551213# and then have asterisk use the first number as
callerid.

All I know about PBX's is that somebody has done similar to that.


On Thu, Oct 22, 2009 at 11:48 PM, PATRICK KANGETHE
<patricemburu at yahoo.com>wrote:
> I want to interface asterisk with a legacy pbx that has around 23
> extensions through my 8 fxs card, how do i work around this?
> Hint: I have already terminated 8 extensions from the legacy PBX, i was
> thinking whether i can peer the extensions from the PBX i.e like 5
> extensions be peered to one extension connecting to the fxs? How can i do
> this?
>
> Thanks in advance,
>
>
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