Failover / Failback Dial peers

[mshekhawat]

Hi,

I am using a ISDN PRI( say Line A) for all my outgoing and incoming PSTN calls, am planning to get one more PRI line ( say line B) from a different service provider which i plan to use for routing all my outgoing calls , while all my incoming calls will still be coming on the existing PRI line, i wanted to have a failover/failback kind of config wherein if my Line B goes down all my outing calls get diverted to Line A and if Line B comes backup all outgoing calls get diverted back to Line B.

Can some one guide me to some document which could guide me how to achieve this ?

Manu

[Aaron Harrison]

The solution depends on whether you are using CallManager or CME, I'm assuming you're using H323 from the title of your post?

If you are using CME and have both PRIs on the CME router (or if you are using CM and a single H323 gateway with both PRIs on it) you just need to create a copy of all your dial-peers you have normally set up for the first PSTN line, but pointed at the other port. Then on each dial-peer set a preference.

e.g.

PRI A

dial-peer voice 1 pots

destination pattern 9T

port 1/0:24

preference 1

PRI B

dial-peer voice 2 pots

destination pattern 9T

port 1/1:24

preference 2

In that example calls will go to dial-peer 1 and 2 if 1 is busy/down...

If you are using CM and have the lines on two gateways then you will need to add each gateway to a route group, then create a route list and add the two route groups in the order you want them to be used.

Then set your route patterns to point at the route list.

Aaron