It is possible to route the call from the second OBi to the first and then bridge the call to an outgoing call using CallCentric. It is also possible to setup CallCentric on a spare VoiceGateway on the second OBi and send the outgoing call thru CallCentric that way without using the other OBi. I've not tried it with 911, but I have done it with a normal outgoing call and with normal calls it works fine. The advantage of doing it thru the VoiceGateway would be the call would not have to route thru OBiTalk.