ASLC is also know as AnalogInformation represented by a continuous electromagnetic wave encoded so that its power varies continuously with the power of a signal received from a sound or light source. Subscriber Loop Carrier. it is a highly efficient analog transmissionThe traditional telephone signaling technology where information, such as sound waves, can be converted into electrical impulses of continually varying strengths. system that uses existing distribution cabling systems to transfer analog information between the central office (system) and a user’s telephone. Moreover, it employs bi-directional transmission over a single exchange grade cable pair used for control. One control pair derives 8 channels using FDM over a 8 to 144 kHz spectrum.