We have some bridges between our office branches. Each branch uses 4 digit extensions. Between some branches, the caller ID removes the first digit. So when 1051 at office A calls, office B sees 051 on their caller ID. It doesn't happen with all branches. What could be causing this? If it matters, we have outbound rules set up so users don't have to dial anything extra to use the bridge. They can just dial the 4 digit extension at any branch to reach the user.