Programmable telephone switcher

[54] PROGRAMMABLE TELEPHONE SWITCHER

[75] Inventors: David L. Kaleita, Sterling Heights;

James A. Zboralski, Clawson; Darryl
A. Hock, Harper Woods, all of Mich.

[73] Assignee: Jabil Circuit Company, Madison
Heights, Mich.

[21] Appl. No.: 778,540

[22] Filed: Sep. 20, 1985

[51] Int. CI." H04M 1/72

[52] U.S. CI 379/201; 379/386;

379/387; 379/397

[58] Field of Search 179/84 L, 84 R, 81 R,

179/84 VF, 99 H, 99 E, 99 R, 84 T; 379/165, 166, 201, 211, 212, 386, 372, 387, 397, 210

[56] References Cited

U.S. PATENT DOCUMENTS

3,965,306 6/1976 Watkins 179/81 R

3,971,899 7/1976 Mcintosh 179/99

4,017,692 4/1977 Garcia et al 179/81 R

4,065,642 12/1977 McClure 179/18 B

4,088,846 5/1978 McEowen 179/99

4,278,844 7/1981 Jones 179/84 C X

4,346,264 8/1982 Sharvit 179/18 DA

4,349,703 9/1982 Chea, Jr 179/18 HB

4,350,848 9/1982 Kariya et al 179/2 DP

4,376,875 3/1983 Beirne 179/18 B

4,408,102 10/1983 Lumpkin 179/99 H

4,429,188 1/1984 Allen 179/84 C

4,446,334 5/1984 Groff 179/81 R

4,459,434 7/1984 Benning et al 179/81 B

4,481,384 11/1984 Matthews 179/18 DA

4,482,786 11/1984 Flynn, Jr 179/90 BD X

4,485,273 11/1984 Bartelink 179/81 R

4,488,006 12/1984 Essig et al 179/81 R

4,490,583 12/1984 Bednarz et al 179/99 R

4,491,693 1/1985 Sano et al 179/99 R

4,538,031 8/1985 Benning et al 179/81 B

4,582,957 4/1986 Hayes et al 179/84 CX

OTHER PUBLICATIONS

TalkTo 109 System Guide by Trillium Telephone Systems Advanced TeleCom Systems Introduces EasyTel. Zoom Update, Jan. 1985 by Zoom Telephonies, Inc. Newsletter Advertisement by Mr. Phone Butler. Jameco Electronics Spring Flyer #127, Electronic Business Update, Nov. 1, 1984.

Cynex Manufacturing Corp. Advertisement for Phone Forward, The TF-Switcher brochure by Command Communications, Inc. 1986.

Primary Examiner—James L. Dwyer

Attorney, Agent, or Firm—Harness, Dickey & Pierce

[57] ABSTRACT

The programmable telephone screening device routes an incoming call to a selected telephone device, depending on preestablished device priorities and upon access codes dialed by the caller. The device provides call hold, call forwarding and automatic dialing and is capable of testing the telephone utility network to determine DTMF and pulse dialing compatability. The device generates ringer signals for directly energizing the ringer circuits of standard telephone devices.

33 Claims, 14 Drawing Figures