AISG (Antenna Interface Standards Group) is an industry consortium that defines standards for the control and communication interface between base station antennas and their associated equipment. The AISG standard specifies various types of cables used in the control and communication system. 3C+1P refers to a specific type of control cable used in AISG systems. It stands for "3 Conductors + 1 Pair." This cable configuration consists of three individual conductors and one twisted pair of wires. The three conductors are typically used for power supply and ground connections, while the twisted pair is used for bidirectional data communication between the base station equipment and the antenna. The data communication includes commands for antenna configuration, monitoring, and diagnostics. Distribution cable, on the other hand, refers to the type of cable used to distribute the control and communication signals across different components within the AISG system. It is responsible for connecting the base station equipment to multiple antennas or other devices in the system.