ITG User’s Guide
Chapter 1 Overview
This
chapter
gives
an overview of the 2 ports & 4 ports desktop version Internet Telephony
Gateway (ITG) and a detailed description
of its front panel and rear panel.
1.1
Features
The ITG 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 Internet Telephony Gateway supports up to eight voice or Fax communications
simultaneously.
Implemented with an efficient Real-Time Operating System (RTOS) and flash
memory,
the
ITG 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 ITG utilizes
advanced
VoIP
related
technology.
It
includes
various
voice
coders
and
fax algorithms,
echo
cancellation,
Voice
Activity Detection
(VAD) , Comfort Noise Generation
(CNG) , and lost packet recovery algorithms.
1.2
Networking
Protocols
The
ITG
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 ITG must have a Real IP
address, subnet, and gateway assigned to it.
Voice over IP Protocol
VoIP enables the ITG to transfer voice communications over an IP
(VoIP)
Trivial File Transfer
Protocol (TFTP)
Real-Time Transport
(RTP)
network. The ITG employs ITU-T H.323 protocol for setting up call
with one another.
TFTP allows you to transfer files over the network. The ITG
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.
RTP is a standard for transporting real-time data over IP network.
The ITG uses RTP protocol to send digitized and compressed voice
packets.
1.3
Package
Contents
Overview
9
