Drop and insert channel bank with reduced channel units

Details Drop and insert channel bank with reduced channel units Drop and insert channel bank with reduced channel units

1980-11-13

1984-02-28

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 58, H04Q 1104

Patent

active

044344856

ABSTRACT:
A drop and insert channel bank is provided for receiving data from and inserting data onto a multichannel digital transmission line, such as a microwave radio link, between end terminals. The channel bank has a plurality of single channel units which share common equipment, including a receiver and a transmitter from and to the transmission line and a switching unit therebetween. The switching unit includes user controlled selection circuitry enabling any channel on the line to be dropped to any of the channel units, and enabling any channel to be inserted on the line from any of the channel units. Through-traffic passes through the receiver, switching unit and transmitter of the channel bank in digital form without conversion to and from analog form. Unidirectional and bidirectional modes are disclosed, including various forms of each.

REFERENCES:
patent: 2740838 (1956-04-01), Pierce
patent: 4046964 (1977-09-01), Daugherty et al.
patent: 4105869 (1978-08-01), Aveneau et al.
patent: 4271508 (1981-06-01), Schenk
"A PCM Drop-Insert Switching System and its Channel Rearrangements" by Akiyama et al., Electronics and Communications in Japan, vol. 52-A, No. 11, 1969, pp. 42-50.
"Single Channel Drop and Insert", by Marconi Co., Telecommunications Applications, Sep. 1973, pp. 41-44.

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