Digital signal cross-connection system
CA 1251584 A · Owner: Bell Communications Research, Inc. · Inventors: Nemchek, George R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.