Device for performing wrap tests on a multiplex link in a data c

Details Device for performing wrap tests on a multiplex link in a data c Device for performing wrap tests on a multiplex link in a data c

1985-06-14

1987-09-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

375 10, H04J 116, H04M 124

Patent

active

046959971

ABSTRACT:
In a data communication system, a device for performing a wrap test on at least one line without affecting the other lines that transmit and receive data over at least one multiplex link (4) within time slots allocated to a given line within a given frame. During each time slot, a wrap control bit (W) is set by the communication system to a state that indicates either the wrap test mode or the normal mode of operation. Said bit controls a logic circuit (51) to cause data to be sent either over line (4) or to the receive circuit to perform the test, within each time slot.

REFERENCES:
patent: 4195206 (1980-03-01), Baichtal
patent: 4302836 (1987-11-01), Bourierd'Iroire et al.
patent: 4419751 (1983-12-01), Cholat-Namy et al.

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