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How does a modem work?

A modulator-demodulator, or modem, converts serial binary digital data to and from the signal form appropriate for the respective communication channel.

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2003-08-27	Westell modems to feature TI ADSL router-on-a-chip Westell Technologies Inc. has selected Texas Instruments' DSL router-on-a-chip to support the recently announced expansion of its family of WireSpeed modems.
2002-05-03	Voltage change for IC-20 (2W) radio modems This application note presents the changes in voltage and part numbers for IC-20 (2W) radio modems.
2011-05-09	USB modems outselling embedded modules There will be sales growth of embedded modem in the coming years as people will prefer to buy embedded devices instead of external USB modems.
2002-04-29	Tyco circuit protector works with modems, modules Tyco Electronics has released a product from Raychem Circuit Protection that protects ADSL and MDF modems, as well as CO, customer premise and access network equipment.
2003-12-16	Testing modems, xDSL and ISDN in a shared environment Dial-up modems, ISDN terminal adaptors and xDSL modems will be more commonly used in a shared environment with the increase in computing power.
2003-08-29	SPM (Subscriber Pulse Metering) for PCMCIA, Data, and Fax Modems This application note discusses the application of Subscriber Pulse Metering for PCMCIA, Data, and Fax Modems
2002-11-12	SPM (subscriber pulse metering) for PCMCIA, data, and fax modems This article describes subscriber pulse metering for telephone lines, fax-call charging and data.
2001-09-06	SPM (Subscriber Pulse Metering) for PCMCIA, data and fax modems This application note discusses the principles of SPM (subscriber pulse metering) for PCMCIA, data and fax modems.
2010-06-25	Software-defined modems cut LTE handset dev't time Cognovo's software-defined modem (SDM) suits handsets of LTE Category 4 data transmission at 150Mbit/s but also scales to support multimode operation with other standards.
2000-12-01	Soft radios and modems on FPGAs In this article, the benefits of using FPGAs over DSPs in the design of a 16-QAM RF transmitter data pump are presented.
2003-07-31	Siemens, Intrinsyc partner on wireless modems Siemens Information and Communication Mobile Group has collaborated with Intrinsyc Software Int. Inc. to develop wireless modem solutions.
2012-02-16	SDK targets multimode software-based modems The CEVA-XC323 DSP enables real-time application software development and system verification for LTE, LTE-Advanced, HSPA+, TD-SCDMA, WiFi and DTV demodulation.
2005-03-03	RF modems can withstand tough environment conditions The new RF modems from AeroComm are housed in rugged NEMA-4x enclosures, designed to withstand the rigors of extreme weather or other severe surroundings.
2013-02-27	Qualcomm showcases 150 Mbit/sec LTE ready Gobi modems Qualcomm's Gobi MDM9625 and MDM9225 enable the LTE Release 10 feature of carrier aggregation to create 150 Mbit/s links without a contiguous 20MHz channel.
2010-10-29	Plug-in GSM/GPRS module platform supports Cinterion modems Radiometrix's GTC01 is a complete GSM/GPRS platform compatible with Quad-band Cinterion GSM modems
2014-06-12	PLC modems support G3, PRIME, IEEE-1901.2 standards Developers can use the TMDSPLCKITV4 platform from TI to create a single PLC project with support for all three major standards across multiple spectrum bands.
2004-02-20	Philips, Broadcom team up on tuner ICs for cable modems Philips Semiconductors disclosed an agreement with Broadcom under which the Dutch company will exclusively provide Broadcom with a new tuner IC specifically designed for existing cable modem applications.
2003-05-16	Optimizing I/O protection for ADSL modems By utilizing ordinary phone lines, ADSL tools need protection from electrical risks such as lightning stresses and other power hazards.
2005-12-01	New ST solution targets picocell basestation modems ST unveiled what it touts as the industry's most comprehensive solution for picocell basestation modems. ST's offering combines the performance of its STW5100 SoC baseband processor with multi-standard software libraries.
2003-06-19	Netopia integrates Conexant ADSL to smart modems Netopia Inc. has incorporated Conexant Systems Inc. single-chip ADSL semiconductor solution in its entire Cayman 3300 Series of smart modems.
2003-04-16	NEC Tokin develops transformer for Power Line modems NEC Tokin Corp., together with Honda Electron Co. Ltd, has developed the PLDM-06 transformer that exhibits a dynamic range of up to 100dB and is designed specifically for Power Line modems operating at <450kHz.
2009-11-17	Modems support DC-HSPA+, multi-mode 3G/LTE Commercial launches of data-centric devices based on Qualcomm's solutions are expected to begin in 2H 10.
2002-02-20	Maxim releases dc/dc converter for GBIC, xDSL modems Designed for GBIC modules and USB-powered xDSL modems and routers, the MAX1970/71/72 dual step-down dc/dc converters operate up to 1.4MHz and 180° out-of-phase.
2004-01-13	Mag Layers common mode filters suit PCs, modems Mag Layers Scientific-Technics Co. Ltd has expanded its CMF series of multilayer common mode filter with the release of the CMF-2012-0090A-N2.
2012-03-30	Integrated sensor nodes with GSM modems simplify wireless DAQ Here's a look at the implementation of a sensor network using a global system for mobile communication modem.
2003-02-13	Huawei deploys Etek's Conexant-based ADSL modems Etek Technology Co. Ltd has selected Conexant Systems Inc.'s single-chip ADSL solution to be used on its ADSL CPE modems.
2006-06-29	Freescale ASICs power Hughes satellite broadband modems Freescale Semiconductor will supply advanced satellite broadband ASIC solution to Hughes Network Systems, LLC.
2002-07-18	Efficient Networks, TI to develop next-gen ADSL modems Efficient Networks Inc. and Texas Instruments Inc. will be working together in the development of next-gen ADSL modems to be deployed worldwide.
2003-04-29	EarthLink deploys DQ Technology ADSL modems EarthLink Inc. has selected DQ Technology Inc.'s VisionNet ADSL Modems to be deployed in its nationwide marketing of ADSL service.
2001-05-01	DSP solutions for telephony and data/facsimile modems This application note describes the DSP algorithms used in telephony applications and explains the functional blocks of analog data and fax modems.