Telephonic communications – Subscriber line or transmission line interface – Protective circuit
Patent
1986-10-29
1988-05-03
Ng, Jin F.
Telephonic communications
Subscriber line or transmission line interface
Protective circuit
361119, 379 27, 379397, 379442, 439620, 439622, 439709, 439718, 174 60, 174138F, H04M 900, H04M 115, H01R 1340, H01R 3100, H02H 322, H02G 310
Patent
active
047425415
ABSTRACT:
An interface for connection between incoming telephone lines and the customers equipment has a base for mounting on a support surface, with terminals for connection of incoming telephone lines and one or more plug-in positions for plug-in modules. Protectors are positioned in the modules. Each module has a modular jack. An intermediate cover fits over and is attached to the base, covering also the modules but with one or more apertures for access to the jack or jacks. The conductors from the customers equipment either terminate in modular plugs which insert directly into the jacks or terminate in spade terminals which are connected to terminals on the intermediate cover. In the latter case, a short interconnect cable connects at one end to these terminals and at the other end has a modular plug for insertion into a jack. An outer cover extends over the intermediate cover and the modular jack or jacks.
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Northern Telecom ad, "Telephony", Jul. 9, 1984, pp. 58-59.
General Cable ad, "Telephony", Jul. 2, 1984, pp. 18-19.
Cwirzen Casimir
Jaycox Donald F.
Byrd Danita R.
Ng Jin F.
Northern Telecom Limited
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