Telephone Auto Central Office Parts

(Page 2) End item NSN parts page 2 of 11
Part Number
NSN
NIIN
03-0005-095 Film Fixed Resistor
004317832
03-0005-149 Film Fixed Resistor
004317825
03-0005-213 Film Fixed Resistor
004698613
031-1666 Fuseholder Subassembly
010870836
034-182 Mica Dielectric Fixed Capacitor
010310446
036-000481-010 Tip Jack
010260915
036-000495-006 Tip Jack
010260915
039-325 Film Fixed Resistor
011069005
04052333008389 Cable Assembly
013758662
041-317 Composition Fixed Resistor
001168569
044745000 Transistor
007601116
0447450000 Transistor
007601116
059609005 Radio Frequency Cable
008125034
065-001756-034 Electrical Insulation Sleeving
007872331
0698-4059 Composition Fixed Resistor
001411176
0698-8068 Film Fixed Resistor
001636958
072210034001 Radio Frequency Cable
008125034
0757-0422 Film Fixed Resistor
004317832
0757-1099 Film Fixed Resistor
004317832
082260011000000 Electrical Plug Connector
005778846
Page: 2

Central Office, Telephone Auto

Picture of Telephone Auto Central Office

A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges.

A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features related to call handling. Business telephone systems are often broadly classified into key telephone systems, and private branch exchanges, but many hybrid systems exist.

A key telephone system was originally distinguished from a private branch exchange (PBX) in that it did not require an operator or attendant at the switchboard to establish connections between the central office trunks and stations, or between stations. Technologically, private branch exchanges share lineage with central office telephone systems, and in larger or more complex systems, may rival a central office system in capacity and features. With a key telephone system, a station user could control the connections directly using line buttons, which indicated the status of lines with built-in lamps.

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