LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Subscriber line or transmission line interface

ISDN terminal adapter for access from analog signal equipment of

Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy

ISDN terminal apparatus

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

ISDN terminal having diagnostic function

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

ISN call interrupt

Telephonic communications – Call signal generating

Isolated drive circuit

Telephonic communications – Repeater – Transmission of power to distant repeater

Isolated high impedance, DC current sources for telecommunicatio

Telephonic communications – Centralized switching system – Structure of equipment

Isolating an inactive cable pair from a bridged active cable...

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

Isolating circuit for telephone apparatus

Telephonic communications – Subscriber line or transmission line interface

Isolation amplifier with hook switch control

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

Isolation of transmit and receive signals

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

Isolation of transmit and receive signals in full-duplex...

Telephonic communications – Subscriber line or transmission line interface

Isolation system with analog communication across an...

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

ITU/TDD modem

Telephonic communications – Reception of calling information at substation in wireline... – Extracting call id from transmitted signal

IVR customer address acquisition method

Telephonic communications – Audio message storage – retrieval – or synthesis – Interacting voice message systems

IVR system manager