[Asterisk-Users] PRI & Asterisk Redundancy/Fail-Over

[John Todd]

Jon -
   Can you please post the name of the product and model number?  Some 
cursory searches don't find appropriate results on eBay or Google.

JT



>look for a T1 failover switch.
>
>(cheap as dirt on ebay, mine was $7.50, - yes really, I got the 
>decimal in the right spot, hard to find an empty rackmount box that 
>is cheaper.)
>
>Basically it looks like a Y in the T1. It contains a csu/dsu on each 
>interface. It decodes the t1 signals, and then re-encodes them using 
>its reframer. It looks at the signal enough to know if one of the 
>branches of the Y is in alarm, lost completely, etc. You can specify 
>the criteria when to switch and when to switch back on restoration 
>of original circuit.
>
>These things are actually designed to take dual t1's coming in and 
>select the right one to feed to CPE, but like you I use mine the 
>opposite way around to connect a working set of CPE to the inbound 
>T1.
>
>I use for a data t1, but voice/pri is all the same as far as this 
>thing is concerned, it only looks at the clocking, and alarm, etc., 
>not the actual data contained in the serial stream.
>
>
>At 08:02 PM 10/27/2003, you wrote:
>>Hi,
>>
>>I'm trying to put together an * system with extremely high up time.
>>
>>The system as it stands now is 1 dual p4 with raid, redundant power, etc..
>>and a T100P card. I would like to get a second similar or identical box
>>with another T100P card. I have 1 PRI, how do I get the second box to take
>>over communication with the PRI should the first box fail? Of course I'd
>>like this to be done without manually unplugging the PRI from box 1 and
>>plugging it into box 2.
>>
>>Thanks,
>>Justin