[Asterisk-Users] Integrating with existing analog PBX

[John Daragon]

Martin Allen wrote:

Asking about inserting Asterisk between a 4 line analogue PBX and the 
outside world...

The proposed solution (with 4 x FXO and 4 x FXS using 2 TDM400 cards) 
will work fine until the asterisk box dies or suffers power failure.

An alternative may be to use 4 Sipura SPA-3000 ATAs (which have an FXO 
and an FXS port as well as an RJ45 network port (think of them as two 
ATAs an a single box...) and are cheap (see http://www.voiptalk.org )


                                                   PSTN

***************                                    ||
*             *  SIP to FXO                  +-----------+
* Asterisk    * -----------------------------|           |
*             *                              |SPA-3000   |
*             * -----------------------------|           |
*             *  SIP to FXS                  +-----------+
***************                                    ||

                                                   PABX


In the event of power failure the FXO port is switched directly to the 
FXS port, effectively bypassing the IP side of things completely.

Actually, I think you *could* build what you're describing just with the 
SPA-3000s, but you would, of course, lose a lot of flexibility...


jd

-- 

John Daragon                                          john at argv.co.uk
argv[0] limited
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