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VOI-8000 User's Guide
Chapter 1 Overview
This chapter gives an overview of the LevelOne VOI-8000, Internet Telephony Gateway
(ITG), and a detailed description of its front panel and back panel.
1.1
Features
The VOI-8000 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
VOI-8000 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 VOI-
8000 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 VOI-8000 supports several industry-standard networking protocols required for voice
communication. The following table describes these protocols.
Networking Protocol
Internet Protocol (IP) IP is a messaging protocol that addresses and sends packets across
Voice over IP Protocol
(VoIP)
Trivial File Transfer
Protocol (TFTP)
Real-Time Transport
(RTP)
Overview
Description
the network. To enable IP protocol, the VOI-8000 must have a Real
IP address, subnet, and gateway assigned to it.
VoIP enables the VOI-8000 to transfer voice communications over
an IP network. The VOI-8000 employs ITU-T H.323 protocol for
setting up call with one another.
TFTP allows you to transfer files over the network. The VOI-8000
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 VOI-8000 uses RTP protocol to send digitized and compressed
voice packets.
1
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