Hello, I have a CME 7.1 with fourteen 7911 ip phones and four 4942 phones. When I place a call from any phone it gets a busy tone at random times, and I need to call several times to the same number until the call goes through.Does anyone has experi...

Hello, I want to set up an 7911 Ip Phone over a Site to Site VPN. VPN is up and running, however when I connect the IP phone on the remote location it keeps registering.LAN IP range is 192.168.6.x, CME is within this IP Range. Voice Vlan is 192.168.8...