The signal from the adjacent channel is inserted into the original communications channel. The access method used in Ethernet. All nodes are attached to a single cable and contend equally for access to the transmission medium. They will both try to send again after Waiting a random number of microseconds. A method of network access not covered by OSI standards and used in AppleTalk networks.
Vendors add value to CSUs by adding performance monitoring and management.
CSUs monitor quality on El, E2 or E3 circuits in terms of transmission and line loading. In its public guise, it becomes a one way telepoint service now no longer available in the UK but prevalent in the Far East. CT3 - Ericsson's proprietary cordless telecommunications system.