Accession Number : AD0289096

Title :   RESEARCH ON MAGNETIC ROD STORAGE AND CONTROL UNITS FOR A SWITCHING CENTRAL OFFICE

Corporate Author : NATIONAL CASH REGISTER CO HAWTHORNE CALIF

Personal Author(s) : RORK,D. ; ELLINGER,P.

Report Date : 30 SEP 1962

Pagination or Media Count : 1

Abstract : Iden ifier : M AGNETIC ROD STORAGE HE YST M HAS TWO BASIC UNITS: A C NTRAL E CHANGE AND ONE OR MORE REMOTE LINE CONC NTRATORS. E ch remote line concentra or service individual phone units (subscribers). Each remote conce trator is capable of handling 60 subscriber lines with a maximum load of 15 subscrib r at t e im . Communication between the remote concentrators and th central exchange is handled by a time-multiplex system consisting of 16 channels one ch nnel for co rol and th remaining 15 channels for subscriber assignment. T e switching c ntral, norm lly provides service for 240 sub cribers. However, this number is expandable to 360 subscribers by the use of two additional remote concentrators. In addition to the normal func ions of connecting c lls an transf rring data, the system also incorporates the following capabilities: (1) one conference circuit capable of handling a maximum of ten li es (2) PROVISION FOR PRIORITY SERVICE FOR A MAXIMUM OF FIVE LINES PER SWITCHING CENTRAL, (3) one operator position for an information-only operator, (4) one circui for ire chief (trouble shooter), (5) interlocking on all trunck calls, and (1 multiplexing and PCM. (Author)

Descriptors :   *MULTICHANNEL COMMUNICATIONS, *TELEPHONE SYSTEMS, ANALOG SYSTEMS, COMPUTER LOGIC, MEMORY DEVICES, DATA STORAGE SYSTEMS, DIGITAL SYSTEMS, MULTIPLEXING, PULSE MODULATION, SURGERY, TELEPHONE SIGNALS

Distribution Statement : APPROVED FOR PUBLIC RELEASE