[Asterisk-Users] T1 multiplexer (or ?) for failover in large installation

[Leon Sun]

Use Adtran Atlas 800. 



-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of qrss
Sent: June 13, 2005 9:55 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] T1 multiplexer (or ?) for failover in large
installation

The box that you are talking about sounds a lot like a DACS.  You might
google around on that term to see if any might have automatic failover.  A
DACS can be reconfigured to cross-connect various DS0s on the fly -
although, no matter how fast the switchover, the carrier will always "see"
that something happened.  Depending upon what type of signalling you are
using, the trunks could end up out of service for a period longer than it
takes to switch to the backup server.  Also, the system can potentially
fail in several ways.  At the T1 level, at the trunk level and at the
application level.  Depending upon the nature of the failure, the one-box
does it all solution seems unlikely to work - at least not by itself.

-----Original Message-----
From: Mike
Sent: Mon, June 13, 2005 11:35 am

Hi,

Please forgive my terminology, still a bit new to T1s and such.

I'm looking for a way to have 5 T1s from a carrier terminate into some
> type
of box (multiplexer?), then be able to plug 7 asterisk servers into that
> box
(each with single port T1 card) and be able to have 2 * servers go down at
any given time and not actually have the carrier see that anything has
> happened.
Obviously if a * server crashes the calls on it at the time will drop, but
then once the box (multiplexer?) sees that a T1 is down (between the box
and asterisk) it will terminate those DS0's on another T1. Basically some
type of hunting/pooling/load balancing.

Anyone heard of anything like this? Or am I off my rocker?

Thanks,
Mike
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