The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1999
Filed:
Jun. 06, 1997
Michael Kennedy, Ventura, CA (US);
James Coleman, Malibu, CA (US);
Harris Corporation, Melbourne, FL (US);
Abstract
The control software of a central office-installed ringback test device is augmented to allow a craftsperson to test the operability of a caller identification, call-waiting (CIDCW) class of service of a line, without participation of another technician at the central office. Rather than instructing the craftsperson to go back in-hook, the SASS's microcontroller maintains the trunk circuit through which the incoming call is coupled to the SASS in a suspended, continuously monitored state, so as to effectively busy out the calling line. The SASS then places a return call to the calling number by way of the ringback line, which by-passes the trunk, to the central office switch. If the line circuit from which the call is being placed is equipped with CIDCW class of service, the incoming call from the SASS will exercise its functionality--including providing a ringing signal back to the SASS, and an indication to the calling technician of another call, including the originating telephone number of that call--but it will not return a busy tone to the SASS. If the SASS receives busy tone, it knows that the line of interest is not properly equipped with CIDCW class of service.