LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Monitoring

Database driven methods and systems for real time call tracing

Telephonic communications – Audio message storage – retrieval – or synthesis – Call source identification

Database for use in telephone communications

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission

Database service for telemarketers to screen and block...

Telephonic communications – With usage measurement – Call traffic recording or monitoring

Database-driven automatic message accounting system and method

Telephonic communications – Subscriber line or transmission line interface

DC control circuit

Telephonic communications – Subscriber line or transmission line interface – Protective circuit

DC holding circuit

Telephonic communications – Subscriber line or transmission line interface

DC level control for an electronic telephone line card

Telephonic communications – Centralized switching system – With generating of call associated substation signal

DC level trip detector

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

DC-supply arrangement for a telecommunication line

Telephonic communications – Subscriber line or transmission line interface – Circuitry to provide a coder and decoder function

DC/DC converter and subscriber line interface circuit

Telephonic communications – Terminal – Housing or housing component

Dealing board

Telephonic communications – Terminal – Housing or housing component

Dealing board

Telephonic communications – Multi-line or key substation system with selective switching... – Line status indication or call alerting

Dealing call terminal device

Telephonic communications – Multi-line or key substation system with selective switching... – Switching or supervision feature

Dealing communication system

Telephonic communications – With check operated control – Other than coin

Debit calling label

Telephonic communications – With usage measurement – Call charge metering or monitoring

Debit card system without centralized server

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

Decentralized video telecommunication system

Telephonic communications – Centralized switching system – Class of service determination or transmission

Declarations for transformations within service sequences

Telephonic communications – Centralized switching system – Call distribution to operator

Declarative ACD routing with service level optimization