[Freeswitch-users] Voip fail over device solutions, please help

[Tim St. Pierre]

Looks like other folks have answered about PRI.

You can in fact fail over large numbers of analog lines.  Look for a power fail relay type device.
I know that Dees Telecom makes some of these.  They have 50 pin Centronics connectors on them, and
can switch large numbers of circuits (all at the same time).  Usually, these are triggered by loss
of electrical power, so you may have to come up with a creative way to activate this device.  If you
can generate some sort of heartbeat signal on a serial or parallel port, that could be used.
Alternately, there are some serial and Ethernet to contact closure interfaces (Adantech's ADAM line
of industrial automation products) that could control the relays.  You would have to write a script
to generate the MODBUS commands that these use, but the protocol is well documented.  If you used
the Ethernet version, either box could issue a command to "switch to me".  That is a little bit more
expensive than making your own heartbeat detector, but it doesn't require any soldering.  You can
also use these boxes to give you status on things, and remotely reboot equipment.

-Tim

Matteo wrote:
> Hi,
> 
> ----- "Carlos Lopez" <the_spide21 at yahoo.com> ha scritto:
> 
>> Hi all,
>>
>> I am planning to deploy some test over a voip server, I'll be setting
>> up two voip servers, but I want to know if there are devices that can
>> take one T1/E1 PSTN lease and then transform that signal into IP and
>> connect it to a ethernet card on each voip server.
> 
> you can setup a pri card into the boxes and use isdnguard (from junghanns)
> or berofos (from beronet) to failover the main pri line to one of the boxes.
> 
> for analog there're some similar solutions, but only for small ports
> numebers...
> 
> mat
> 
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