Fast reframing arrangement for digital transmission systems

Details Fast reframing arrangement for digital transmission systems Fast reframing arrangement for digital transmission systems

1974-07-19

1976-06-29

Atkinson, Charles E.

Telegraphy

Systems

Line-clearing and circuit maintenance

179 15BS, 325 41, 3401461D, H04L 700

Patent

active

039670600

ABSTRACT:
Reframing of digital receivers, for example, those employed in D-1 channel banks is enhanced by employing a switch to inhibit reception of transmitted signals and a signal generator to supply a prescribed signal to the receiver during intervals in which reception is inhibited. The frequency of the signal supplied to the receiver is set at a predetermined value so that the framing signal generated in the receiver is maintained in a desired relationship to that of the transmitter. This arrangement presents a definite out-of-frame appearance to the receiver and maintains the framing of the receiver in a prescribed relationship to that of the transmitter during intervals in which received signals have undesirable characteristics.

REFERENCES:
patent: 3550082 (1970-12-01), Tong
patent: 3571794 (1971-03-01), Tong
patent: 3581010 (1971-05-01), Kobayashi
patent: 3699261 (1972-10-01), Tomozawa
patent: 3729586 (1973-04-01), Chow
patent: 3865981 (1975-02-01), Welch et al.

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