LandOfFree - US Patents - Listing for Telephonic communications

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal

Determining the physical structure of subscriber lines

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

Determining whether a telephony call is permitted based on...

Telephonic communications – Telephone line or system combined with diverse electrical...

Device and a method for feeding electric devices from a...

Telephonic communications – Reception of calling information at substation in wireline... – Non-assigned telephone number indication

Device and method for announcing an incoming call

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm

Device and method for article storage and release

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Device and method for automatically controlling sound volume in

Telephonic communications – Echo cancellation or suppression – Using digital signal processing

Device and method for carrying out multichannel acoustic...

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Device and method for cleaning telephone number list

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

Device and method for connecting a monitored alarm system to...

Telephonic communications – Subscriber line or transmission line interface – Power supply

Device and method for detecting presence of service on...

Telephonic communications – Echo cancellation or suppression – Residual echo cancellation

Device and method for echo compensation in a two-wire full...

Telephonic communications – Centralized switching system – Structure of equipment

Device and method for expanding legacy switches

Telephonic communications – Centralized switching system – Call distribution to operator

Device and method for generating a list of qualified call...

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling

Device and method for improving the load distribution in a...

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

Device and method for isolating voice and data signals on a comm

Telephonic communications – Terminal – Housing or housing component

Device and method for monitoring shock

Telephonic communications – Special services

Device and method for network communication

Telephonic communications – Special services – Service trigger

Device and method for playing a ring signal based on a...

Telephonic communications – Echo cancellation or suppression – Using digital signal processing

Device and method for processing audio signals and...