[Asterisk-Users] gateways failover with asterisk

[john rival]

Hi,

I've searched the archive but can't seem to find the answer to my
problem.
i have two gateways running with asterisk , my question is : is there any 
possibility to do failover with gateways with asterisk ? i mean that if one 
gateway is down , asterisk switch automatically to other gateway .
i have succefully used failover with limit number off calls (if gw1 have max 
calls ,asterisk swith to gw2) , but now i want if it is possible  if  gw1   
is down ,asterisk go out over gw1 ?

regards.