1. Conference 3 way. Am send the config of both the routers 2. Key system/ PBX connectivity. The Toplogy is as follows.AnalogPhones<--->SamsungNX-820-PBX<---->ATA186<--->Switch-RtrA(CME4.0)<--->WAN(512kbps)<--->RtrB<--->FxO<-->PSTNPl. Help with the r...