[Asterisk-Users] E1/T1 failover hardware

[astgroups]

We use the following device for Asterisk fail-over and our T1s. I
believe they have an E1 version also:
http://www.red-fone.com/fonebridge.html



On Thu, 2005-10-20 at 11:23, John Daragon wrote:
> Warning ! I know zip about electronics.
> 
> I've been looking for a device to handle the switching of an E1 
> connection from one Asterisk box to another in the event of a 
> catastrophic server failure.  All of the solutions I've seen so far have 
> been designed to handle the situation where the telco line faults so 
> that the local PBX can switch to a secondary E1.
> 
> I've come across this application note :
> 
> http://www.maxim-ic.com/appnotes.cfm/appnote_number/2857
> 
> which describes "T1/E1/J1, N+1 Redundancy With Analog Switches"
> 
> These parts are obviously designed to be built into E1 boards - hence, I 
> think, the protection circuitry.
> 
> Here's the question, then :  what (apart from jumping through regulatory 
> hoops) is to stop a simple array of MOSFETS (and a bit of control 
> circuitry) implementing a failover switch controlled (say) by a pin on a 
> serial or parallel port ?
> 
> jd