I currently have a PRI with a bunch of DIDs operating in site A. We are planning to set up a site B with its own PRI and its own DIDs. I would like to be able to also set up PRI B so it serves as a backup to PRI A.
Here are the options I've thought of:
-. All calls ring PRI A and should it be down they ring PRI B
-. All calls to PRI A ring PRI A and PRI B simultanously. Calls to PRI B only ring in PRI B.
Are these options feasable? Is there another way to set them up?
A few more questions:
-. should any carrier be able to set this up?
-. do both PRIs have to be with the same carrier?