1. Bearer Channel Connection -- 承载信道连接
2. Bearer Connection Control -- 承载连接控制
3. Block Character Check -- 块特性校验
4. Blocked Call Cleared -- 阻塞呼叫清除
5. Broadband Communication Channel -- 宽带通信信道
6. Base station Color Code -- 基站色码
7.BTS Color Code--基站色码
