Text message transmission apparatus and method thereof

Network telephone device, external connection card and communication method therefor

Protection of a telephone line against overvoltages

Base of cordless digital telephone set, cordless digital telephone set, and voice data transmitting method

Transmitting Utility Usage Data via a Network Interface Device

METHOD AND APPARATUS FOR VECTORING ADSL2 LINES

Method for optimising electrical consumption of a residential gateway

Methods, systems and apparatus for providing video transmissions over multiple media

Serial Protocol for Agile Sample Rate Switching

Methods and systems for controlling a user device in a telecommunication network

Methods, systems and apparatus for selectively distributing urgent public information

SYSTEM THAT ENABLES A CALLING PARTY TO COMMUNICATE WITH A CALLED PARTY OVER A COMMUNICATIONS NETWORK USING AN INTERNET CONVERSION DEVICE

Continuous Power Transfer Scheme for Two-Wire Serial Wire

Communication system

Communication line testing with protective devices in place

POTS extender for voice fallback in a subscriber line

Serial protocol for agile sample rate switching

Shared protection scheme for multiple variable batteries

Alert gateway, systems and methods

Continuous power transfer scheme for two-wire serial link

ENHANCED CMTS FOR RELIABILITY, AVAILABILITY, AND SERVICEABILITY

Overvoltage protection with power sink

Method and apparatus for shared positive protection

Method and apparatus for controlling ringing voltage

Method and apparatus for detecting ring trip precursors

Systems, circuits and methods for dual transformer duplexing

Method and apparatus for ringing

Phone and method for reducing noise in a subscriber line interface circuit thereof

VOIP DEVICE AND METHOD FOR ADJUSTING INTERRUPT TIME THEREOF

Systems and Methods for Integrating Microservers with a Network Interface Device

Systems and methods for controlled transmittance in a telecommunication system

Port detection and protection circuit and electronic device using the same

Communication apparatus

SUBSCRIBER LINE INTERFACE CIRCUITRY WITH COMMON BASE AUDIO ISOLATION STAGE

Communication system for VoIP using an internet protocol converter

Enhanced CMTS for reliability, availability, and serviceability

Protection circuit for a subscriber line interface circuit

Transmitting utility usage data via a network interface device

Scaleable VoIP telephone line circuit

Dynamic Routing of Wideband and Narrowband Audio Data in a Multimedia Terminal Adapter

Protection Circuit and Method

Circuit to provide backup telephone service for a multiple service access system using a twisted pair

Method and apparatus for providing a soft clock re-sync for subscriber line interface cards

Method and device for checking the connection of a positive supply voltage to a subscriber access line comprising a plurality of wires

Methods and apparatus for low voltage control of a subscriber line interface circuit

Communication system

Method and Device for Connecting an Additional Subscriber to a Telephone Exchange

Delay line correlator

Longitudinal balance calibration for a subscriber line interface circuit

Digital DC Feed for a Subscriber Line Interface Circuit

Adaptive Power Offloading for a Subscriber Line Interface Circuit

POTS Extender for Voice Fallback in a Subscriber Line

POTS extender for voice fallback in a subscriber line

Output stacking architecture for an amplifier

Methods and apparatus for performing subscriber line interface functions

Subscriber Line Interface Circuitry

Subscriber Line Interface Circuitry

Systems and methods for controlled transmittance in a telecommunication system

Digital subscriber line arrangement

Methods, systems and apparatus for providing urgent public information

High-speed communications network tap with zero delay

Subscriber Line Interface Circuit (SLIC) Including A Transient Output Current Limit Circuit And Related Method

Continuous power transfer scheme for two-wire serial link

Subscriber line interface circuitry with common base audio isolation stage

Serial protocol for agile sample rate switching

Switched mode current feed methods for telephony subscriber loops

Enhanced CMTS for reliability, availability, and serviceability

Voice-over-IP device using dial-up modem

Switched supply coupling for driver

Programmable subscriber line circuit partitioned into high voltage interface and digital control subsections

System diagnostic mode for a security central station receiver

Methods, systems, and computer program products for substitution of card-based telephony bearer channel switch modules in a manner that preserves stable calls

Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit

In-home Voice-Over-Internet-Protocol telephony distribution

Selective analog signal sensing from a plurality of integrated circuits using a common node

Method and apparatus to provide selective status information for communications channel(s)

Telephony distribution system

Residential telephone system and method

Telephone exchange apparatus, interface circuit used in the telephone exchange apparatus, and control method used for the telephone exchange apparatus

Subscriber line interface circuitry

Signal processing unit with serial time multiplex connections between signal processing and control means

Test method for line equipment including a hybrid circuit and line equipment for its implementation

Systems and methods for providing pooled access in a telecommunications network

xDSL-line-interface-circuit

Subscriber line interface circuitry transceiver

Analog subscriber board

Telecommunications device for use between an analog telephone and a packet network

Power supply control using dynamic controller parameter(s)

Methods, systems and apparatus for providing video transmissions over multiple media

Telecommunications device for use between analog telephones and a packet network

Circuit to provide backup telephone service for a multiple service access system using a twisted pair

Automatic telephone line switch

Telephony interface apparatus

Telephone interface circuit

Systems and methods for delivering picture-in-picture signals at diverse compressions and bandwidths

Alert gateway, systems and methods

Digital signal processing system and method for a telephony interface apparatus

Method and apparatus for detecting a secondary destination of a telephone call based on changes in the telephone signal path

Subscriber line interface circuitry

Communication systems and methods for using shared channels to increase peak data rates