[Serusers] Question about PSTN Gateways and SER.

[Ricardo Martinez]

Hello List.
	I'am starting to use SER as my SIP platform and i'am  still in a
testing phase.   I would like to ask you a question.  If we have several
PSTN Gateways connected to SER, we want to be able to select one of them
depending on the destination number dialed, so far this is no a problem, we
use a combination of "if" with the "URI" and a rewritehostport() and works
ok.  But now, the gateway termination is needed to be dynamic, so if we have
any problems with a destination in one of our gateway we want to route to
another gateway, maybe changing the "rewritehostport("IPGW2")" to another
gateway.  The problem with this if we need to restart the SER service every
time we make a change in the ser.cfg file.  So here is my question.  Is
there another way to do this?, maybe a Failover PSTN Gateway Selection, i
heard about a B2BUA server can do this task.
I rellay hope that someone could give me a clue about this matter.

Thanks in advance
Best Regards

Ricardo Martinez.