VoIP modem

(redirected from EMTA)
Also found in: Financial, Acronyms, Wikipedia.

VoIP modem

(1) (Voice Over IP modem) A device that converts Internet-based voice service from the cable or telephone company to the user's telephones. Officially called an analog telephone adapter.

(2) (Voice Over IP modem) A device that converts Internet-based voice service from the cable company to the user's analog telephones. A VoIP modem combines a DOCSIS cable modem and analog telephone adapter (ATA) in one unit. Officially an "embedded-multimedia terminal adapter" (E-MTA), the modem converts the cable company signals to packets and vice versa, and the terminal adapter converts the packets to analog voice and vice versa. The adapter also delivers dial tone and manages the call setup.

If the VoIP modem supports cable access, it may be called a "VoIP cable modem," and for DSL telephone access, a "VoIP DSL modem."

CableLabs Certification
PacketCable certification from CableLabs ensures that quality of service (QoS) and other critical telephony and real-time functions are supported for delivering multimedia over IP. See analog telephone adapter, VoIP, cable modem and DOCSIS.

Combined and Separate Units
A VoIP modem can stand alone for VoIP conversion only, or it can be combined with a cable or DSL modem for both voice and data over the Internet.

Connecting a VoIP Cable Modem
This wiring diagram for a Cisco VoIP cable modem shows the coaxial line (RF cable) from the cable company coming into the unit. Analog outputs go to the telephones, and digital output to the PC (or to a switch for more connectivity). (Image courtesy of Cisco Systems, Inc.)
References in periodicals archive ?
EMTA said Lumea currently has relationships with numerous industrial/commercial clients that could represent potential users of its energy conservation and emissions reducing products.
After EMTA received its contract, KBR took on a secondary role at the base, providing back-up power and generator support.
Steve Pressey, project manager for EMTA explained: "The Advanced Engineering Skills Project is designed to help companies in the aerospace supply chain and in what we have termed 'advanced engineering'.
EMTA offers 500 places on introductory courses at a dozen universities each year to girls interested in discovering more about engineering careers.
Founded in 1990, EMTA (formerly the Emerging Markets Traders Association) is a not-for-profit corporation dedicated to promoting the orderly development of fair, efficient and transparent trading markets for emerging markets instruments, and the integration of the emerging markets into the global financial marketplace.
Himachal's only thermal power plant is being set up in Raniganj by Himachal EMTA Power Limited ( HEPL), which is a 50- 50 joint venture company between the Himachal Pradesh Power Corporation Limited ( HPPCL) and the Kolkatabased Eastern Mineral and Trading Agency ( EMTA).
Technical manager Paul Hudson received the award on behalf of the firm from Elisabeth Bonfield, head of business development for awards sponsor EMTA Awards Ltd.
As maintenance electrician, you can follow training recommended by EMTA (typically modern apprenticeships).
To qualify as an electrician, you must have an Electrotechnical Services NVQ at level 3, which is awarded by City & Guilds and EMTA Awards Limited.
EMTA plans to publish the results on a monthly basis in major trade publications so that trucking fleets can see these results first hand.
The TNETC4800 supports full functionality EMTA applications and includes a battery back up subsystem, the TNETC4810 is optimized for EMTA applications without battery back up, while the TNET4830 is optimized for data cable modem applications, the company said.
Since leaving school, the trio have spent the last four-years on the tailor-made apprenticeship programme, designed specifically for SCA by EMTA Awards Ltd (EAL), the awarding body for the engineering and technology industry.