G800 (Digium Gateway) with several PSTN operators


Dont know really where to post this topic…

I want to buy 2 G800. I actually have 2 audiocodes mediant 2k, I want to replace them by these Digium gateways.
I want to connect several PSTN operators (via E1). Is it possible ?
Somebody told me that i must have one gw for each PSTN operator due to timing issues.

Thanks for reply.