LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Centralized switching system – Structure of equipment

Digital clocking synchronizing mechanism

Telephonic communications – Substation or terminal circuitry

Digital communication system

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

Digital communication system using telephone line and...

Telephonic communications – Substation or terminal circuitry – Visual signalling

Digital communication system with transmission servers

Telephonic communications – Supervisory or control line signaling – Substation originated

Digital communication translator

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Digital composite tone alerting

Telephonic communications – Audio message storage – retrieval – or synthesis

Digital computer platform for supporting telephone network appli

Telephonic communications – Audio message storage – retrieval – or synthesis

Digital computer platform for supporting telephone network appli

Telephonic communications – Emergency or alarm communications

Digital control of a security system

Telephonic communications – Audio message storage – retrieval – or synthesis

Digital cordless telephone set operated under burst synchronizat

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network

Digital cordless telephone system readily capable of setting up

Telephonic communications – Composite substation or terminal

Digital cordless telephone with remote control feature

Telephonic communications – Subscriber line or transmission line interface

Digital data loopback device

Telephonic communications – Line equalization or impedance matching

Digital data-dependent ac impedance termination of telephone lin

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Digital dialed digit unlock method and system

Telephonic communications – Special services – Anonymous party

Digital dictation system

Telephonic communications – Special services – Anonymous party

Digital dictation system having a central station that includes

Telephonic communications – Audio message storage – retrieval – or synthesis – Multilingual system or operation

Digital dictation system with voice mail capability

Telephonic communications – Subscriber line or transmission line interface – Network interface device

Digital direct current feed control for a communication system