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:
Jul. 14, 1981
Filed:
Mar. 26, 1979
David F Jones, Middletown Township, Monmouth County, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A call screening arrangement is disclosed for an intercom communication system in which call features are activated by entering a two digit code from the rotary or multifrequency dial of the connected station sets. Incoming calls to a called station are screened according to the type of call features activated at the called station. The particular call screening feature activated is determined by the order of the sequential activation of the existing Call Forwarding, Callback or Do-Not-Disturb call features. The call screening features enable incoming calls controlled by either a Call Forwarding or Callback feature to selectively bypass a Do-Not-Disturb call blocking feature at the called station. When activated individually the Call Forwarding, Callback and Do-Not-Disturb features perform their individual call control routines.