Electronic assembly, so-called Call Processor Pack, consisting of a printed circuit board equipped with a processor, memory modules and other electronic components. ... The assembly is designed for use as a main module in a automatic telephone exchange system having special plug connectors for this purpose ...
44-13-310 Private branch exchange with automatic switching
44-13-320 Telephone exchange with automatic switches
44-13-330 Rural exchange
44-13-500 Electronic telephone exchange
44-13-900 Other telephone exchanges
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