Arrangement for controlling seizure of a connector

Details Arrangement for controlling seizure of a connector Arrangement for controlling seizure of a connector

1976-06-16

1977-06-28

Yusko, Donald J.

Communications: electrical

Digital comparator systems

1791752R, H04M 322, H04Q 900

Patent

active

040328902

ABSTRACT:
A prior art crossbar switching system provides a test frame connector which may be seized by a marker for the purpose of causing a trouble data record to be made (e.g., by a trouble recorder card perforator). All markers compete for normal seizure of the connector by means of the usual connector seizure circuit arrangement of preference relays and connector relays whereby normal marker seizure attempts are recognized and served so that only one normal seizure at a time is permitted. A new interface circuit is provided so that a computer can effect a special seizure of an idleconnector and so that no normal seizure attempt can be recognized by the seizure circuit while the special seizure situation prevails; however, the interface can detect a normal seizure attempt which occurs at any time while the special seizure is in the process of being effected. Upon detection of such a normal seizure attempt, the interface causes the cessation of the special seizure situation so that the normal seizure attempt can be recognized and served. Thus, any such special seizure situation is rendered transparent to normal marker seizure attempts. Also, the interface permits the computer to intercept a normal marker seizure of the connector so that the computer can either collect the trouble data in lieu of the perforation of a trouble card or can allow the usual trouble card to be perforated.

REFERENCES:
patent: 2508052 (1950-05-01), Williford
patent: 3892928 (1975-07-01), Casterline et al.
patent: 3898395 (1975-08-01), Crosley et al.
patent: 3952172 (1976-04-01), Penn et al.

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