VoIP modem

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VoIP modem

A device that combines a DOCSIS cable modem and analog telephone adapter. Officially called an "embedded-multimedia terminal adapter" (E-MTA), the modem provides the data interface to the cable company, and the telephone adapter provides the voice over IP (VoIP) interface for one or more analog telephones.

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.

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.

VoIP and Internet Modems
The coaxial cable from the cable company is split (bottom) and wired separately into the VoIP modem and cable Internet modem. One analog phone line from the VoIP modem goes into a small PBX that also connects to three SIP lines for this small business.

References in periodicals archive ?
Taiwanese E-MTA Shipment Share by Business Type, 1Q 2008 - 2Q 2010
Taiwanese E-MTA Shipment Volume by Shipment Destination, 1Q 2008 - 2Q 2010
Taiwanese E-MTA CPE Chipset ASP by Technology, 1Q 2007 - 4Q 2009
This report includes cable modem CPE market value, ASP, market share by technology and solution provider, as well as cable modem and E-MTA shipment BOM structure.
Taiwanese E-MTA Shipment Volume by Solution Provider, 1Q 2008 - 2Q 2010
Taiwanese E-MTA Shipment Share by Solution Provider, 1Q 2008 - 2Q 2010
We are honored to have again been selected by the NCTC to supply them with our video, voice and data solutions, as well as to have been designated their exclusive E-MTA provider on selected models," said ARRIS SVP Sales Tim Gropp.
ARRIS' Touchstone TM502 series is engineered to combine the latest industry silicon technology with an updated battery design to delivery the greatest value (feature-rich and cost-effective) E-MTA products available on the market today.
We have selected ARRIS E-MTA equipment as a preferred product because of the superior quality, value and service associated with their Touchstone(R) line of E-MTAs and cable modems," said Mark Bishop, NCTC Senior Vice President of Hardware, on announcing the selection.
Also included are forecasts for cable CPE with E-MTA, VoIP-enabled DSL CPE and routers, and DOCSIS standard migration.
is also an ARRIS Touchstone(R) Embedded Multimedia Terminal Adapter (E-MTA) customer and has been using Touchstone E-MTAs to provide voice service since it began offering Voice over Internet Protocol (VoIP).
ARRIS Touchstone(R) E-MTAs are consumer premises devices that deliver an Internet connection plus 1, 2, 4, 8 or 12 primary-line voice ports for residential and small-to-medium sized businesses.