The CTC products provide standardized two-way communications between cab and trailer. These modules function under the SAE J-2497 "PLC4TRUCKS" Power Line Carrier using the Center Pin Wire J-560 Connector between cab and trailer. From the safety and comfort of the cab the operator has complete monitoringand control of:• Trailer ABS in dash fault light using "PLC4TRUCKS" protocol• Lift Axle function control and status• Trailer reverse lights and alarm (Also can be used for self steer lift & lock)• Trailer air brake tank reservoir pressure monitoring• Suspension slider control with in-cab indicator showing locked andunlocked position (CTC 400 only)• Auxiliary (Pid) for special fleet applications (CTC 400 only)