Special services add-on for dial pulse activated telephone switching office

Patent 4232199 Issued on November 4, 1980. Estimated Expiration Date:

October 18, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3363063

3546393

3689703

3710033

Remotely programmable call diverter
Patent #: 3959600
Issued on: 05/25/1976
Inventor: Sousa

Apparatus for custom calling features in a telephone system Patent #: 3997731
Issued on: 12/14/1976
Inventor: Wilmot , et al.

Inventors

Assignee

Summa Four, Inc.

Application

No. 05/952487 filed on 10/18/1978

US Classes:

379/197, Central office379/205.01, Conferencing initiation by single calling station379/207.06, Transition from off-hook to on-hook (e.g., busy to idle, hook flash)379/209.01, Repetitive call attempts (e.g., camp-on-busy, retry)379/216.01, Abbreviated dialing or direct call (e.g., hot line)379/243, Class of service determination or transmission379/246, Of line or trunk379/909, ALTERNATIVES379/914PROGRAMMABLE TELEPHONE COMPONENT

Examiners

Primary: Brown, Thomas W.

Attorney, Agent or Firm

Cesari & McKenna

International Classes

H04Q 3/00 (20060101)
H04M 3/42 (20060101)

Abstract

A special services add-on specifically adapted for use in a dial pulse activated telephone switching office such as a step-by-step office to enable the addition of various modern features thereto, thereby extending the economic life of the office. The add-on is a stored program, processor based system that can be put into service on a line-by-line basis independent of subscriber line assignments. Among the special services provided by the add-on are incoming call alert, call conferencing, call forwarding, tone dialing, abbreviated dialing, instant recall, restricted calling, ringback, delayed ringback and ring disable. Various of the services are remotely controllable by the subscriber by dialing programming instructions to the add-on either from his own or another telephone subset.