[Asterisk-Users] Re: Centrex

[Jay Hennigan]

On Mon, 1 Nov 2004 Tim Sailer wrote:

> OK folks,
>  I'm trying to help get another remote Asterisk box up and running.
> The system currently has a single FXO card, but it doesn't seem to
> be working, my guess is because the inbound line is CENTREX. Knowing
> nothing about Centrex, can someone tell me if I'm right, and need an
> FXS card?

Centrex in its most common form is physically the same as a loop start
POTS line.  If you can plug a plain old phone into it, get dial tone,
and make and receive calls an FXO card will work.  You'll need to set
the dialplan to input a leading 9 to call out to the PSTN from the
Centrex line, and you can also build a dialplan to call other Centrex
stations of the business with typically three or four digits.  Generally
these inter-office calls are free of message unit charges.

If a regular phone rings but the Asterisk doesn't detect ringing, try
swapping the two wires of the line, also make sure that the Asterisk
has a good ground.  Some ringing circuits are fussy that way.

--
Jay Hennigan - CCIE #7880 - Network Administration - jay at west.net
WestNet:  Connecting you to the planet.  805 884-6323      WB6RDV
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