Special Features:

6 to 4 channels; analog interface2 wire; 64 kbps pcm incoding; internaltimer; fits into any i/o slot; for local battery telephones

Properties:

An electronic device capable of controlling voltage and/or current to produce gain, oscillation or similar integral functions. It consists of a collection of electronic parts such as capacitors, resistors, coils, relays, transistors, semiconductor devices, and microcircuits in a single replaceable package. The configuration, physical dimensions, and electrical parameters of the item have been standardized in accordance with government and/or industry specifications and/or standards. Excludes items with nonstandardized configuration. It is not subject to disassembly as distinguished from such items as circuit card assembly and electronic components assembly. Do not use if a more specific item name exists such as amplifier (as modified), coder (as modified), microcircuit (as modified), and oscillator (as modified).