Time slot switching function diagnostic system

Details Time slot switching function diagnostic system Time slot switching function diagnostic system

1992-05-07

1994-09-20

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 68, 371 204, H04J 116, H04J 314

Patent

active

053495780

ABSTRACT:
According to this invention, a time slot switching function diagnostic system includes a first inserting circuit, a data memory, an address controller, a second inserting circuit, and a check circuit. The first inserting circuit inserts path monitoring test pattern data into a specific on-line time slot of a unit frame consisting of N time slots. The data memory writes and reads data input to the time slots. The address control circuit supplies write and read addresses to the data memory. The second inserting circuit feeds back an output from the data memory to an input side to repetitively insert the test pattern data in time slots sequentially following the specific time slot. The check circuit extracts the test pattern data from an output corresponding to an Nth time slot of the data memory to check the test pattern data.

REFERENCES:
patent: 3869603 (1975-03-01), Auspurg et al.
patent: 4383312 (1983-05-01), Reed
patent: 4491838 (1985-01-01), West
patent: 4782487 (1988-11-01), Smelser
patent: 4965799 (1990-10-01), Green et al.
patent: 5072447 (1991-12-01), Perloff et al.
patent: 5138608 (1992-08-01), Kucera et al.

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