Digital signal cross-connection system

Details Digital signal cross-connection system Digital signal cross-connection system

1985-12-05

1987-04-28

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 22, H04M 326

Patent

active

046619712

ABSTRACT:
In a digital signal cross-connection system, the functions of the cross-connection of equipments and the access to those equipments for testing purposes are separated. The jacksets utilized for testing access are removed from the cross-connection bays and are considerably fewer in number than the terminations on the cross-connection bays. A concentrator switch is interposed between the jacksets and the cross-connection bays so that access is provided to the transmit and receive leads to the cross-connection bays only on an as needed basis, the concentrator switch also providing a control function for disconnecting the digital equipments from the cross-connection bays.

REFERENCES:
patent: 3812302 (1974-05-01), Herr
patent: 3919503 (1975-11-01), Friedrichsen et al.
patent: 4076970 (1978-02-01), Lubarsky et al.
patent: 4185174 (1980-01-01), Beyhurst et al.
patent: 4533914 (1985-08-01), Norling et al.
"Test Equipment for Siemens ESK 3000E Crosspoint PABXs" by E. Dotzauer et al, Reports on Telephone Engineering VII (1971) No. 4, pp. 128-135.
"No. 1 Crosspoint Tandem-Trunks, and their Maintenance Facilities" by S. H. Fuchs, et al, GTE Automatic Electric Technical Journal, Jul. 1972, pp. 131-136.

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