Have a multi site bcm(3) to single sig server/fronting a PBX .The customer has changed his network provider to a flat network.(no routers at locations) implemented at first site today and cannot call over voip trunks to main site, can call other sites when i get a dhcp IP address to the bcm from the main location. Only change made was to the IP address of the BCM in question went from a 192.168.x.x/255.255.255.0 to a 10.0.x.x/255.0.0.0 scheme I am not a networking specialist by any means but was able to figure out that i had a conflict on the internal subnet/ changed those address and conflict stopped. now I am still having same dialing issue once the bad bcm site registers to the Gatekeeper I can call the other 2 bcms with 4 digit dialing just not the main location(they cannot call bcm in question either). i think this an ip/network issue just not sure what to really look for at this point. any help or thoughts would be appreciated.