TRENDnet TVP- 221H, VoIP Gateway Overview, Chapter, Features, Networking Protocols, Description

TVP-221H User’s1Guide

Chapter 1

Overview

This chapter gives an overview of the 4 ports desktop version VoIP Gateway (TVP-221H) and a detailed description of its front panel and rear panel.

1.1Features

The TVP-221H is a cost-effective and highly reliable analog Voice over IP (VoIP) Gateway that offers toll quality voice and real-time fax data over IP networks. With its embedded architecture, the gateway is ideal for VoIP applications associated with Remote Office and Branch Office (ROBO) environments. With its built-in user-friendly interface, the gateway may be installed easily and conveniently to yield immediate cost savings. One VoIP Gateway supports up to four voice or Fax communications simultaneously.

Implemented with an efficient Real-Time Operating System (RTOS) and flash memory, the TVP-221H provides upgradeable capabilities, so it may be programmed with updated firmware locally or via the network at any time. It comes equipped with remote management capabilities, configurable signaling to work with PBX, KTS, and/or telephone. The TVP-221H utilizes advanced VoIP related technology. It includes various voice codecs and fax algorithms, echo cancellation, Voice Activity Detection (VAD) , Comfort Noise Generation (CNG) , and lost packet recovery algorithms.

1.2Networking Protocols

The TVP-221H supports several industry-standard networking protocols required for voice communication. The following table describes these protocols.

Networking Protocol	Description
Internet Protocol (IP)	IP is a messaging protocol that addresses and sends packets
	across the network. To enable IP protocol, the TVP-221H
	must have a Real IP address, subnet, and gateway assigned
	to it.
Voice over IP Protocol	VoIP enables the TVP-221H to transfer voice
(VoIP)	communications over an IP network. The TVP-221H
	employs ITU-T H.323 protocol for setting up calls with
	one another.
Trivial File Transfer	TFTP allows you to transfer files over the network. The
Protocol (TFTP)	TVP-221H implements a TFTP client allowing you to
	download new revision firmware from a TFTP server. The
	TFTP client requires a TFTP server in your network.
Real-Time Transport	RTP is a standard for transporting real-time data over IP
(RTP)	network. The TVP-221H uses RTP protocol to send
	digitized and compressed voice packets.

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