[Serusers] Multiple PSTN routes

[Kyriakos Mavromichalis]

Hi,
  i have been doing some searching for how to route to a standby pstn gateway  
when primary pstn gateway fails. From what i gathered we can either have a 
failure route that sends the call to the second pstn gateway after an 
unsuccessful attempt of relaying to the primary gateway, or do a parallel 
forking to both and the gateway that is active responds back.

Which is the best method ? Are there any resources i can read for setting this 
up?

-- 
Kyriakos Mavromichalis	
Otenet Telecom