User`s manual

6
warranty. We reserve the right to revise the manual and online documentation and to make
changes from time to time in the contents hereof without obligation to notify any person of such
revision or changes.
Note
Repair or replacement, as provided under this warranty, is the exclusive remedy of the
purchaser. This warranty is in lieu of all other warranties, express or implied, including any
implied warranty of merchantability or fitness for a particular use or purpose. We shall in no
event be held liable for indirect or consequential damages of any kind of character to the
purchaser.
To obtain the services of this warranty, contact us for your Return Material Authorization
number (RMA). Products must be returned Postage Prepaid. It is recommended that the unit
be insured when shipped. Any returned products without proof of purchase or those with an
out-dated warranty will be repaired or replaced and the customer will be billed for parts and
labor. All repaired or replaced products will be shipped by us to the corresponding return
address, Postage Paid. This warranty gives you specific legal rights, and you may also have
other rights that vary from country to country.
Introduce
L / S series VoIP Gateway and Call Manager are the low to high VoIP total Solutions. This
document describes the usage of Voice gateway and Call Manager.
1.1 Overview
VoIP Gateway which is a device that allows one to connect a normal PSTN telephone to the
Internet in order to make or place telephone calls.
VoIP Gateway device may work in conjunction with a computer, such as an IP-sharing /
Router, or it may be a stand-alone device that communicates with a service provider over the
Internet.
VoIP Gateway provides a direct analog interface for computer modems, fax machines, analog
telephones, and other devices that require an analog port.
2/4/8 port Series VoIP Gateway can build in a simple H.323 Gatekeeper or SIP Proxy Server.
VoIP Gateway also support standard Internet services, such as IP-Sharing, NAT, Virtual
Server, DDNS, QOS, Port Filter, IP Filter function.
1.2 Acronyms Table
Acronym: Full Name: Acronym: Full Name:
ADC Analog to Digital Converter CODEC Coder / Decoder
DAC Digital to Analog Converter DC Direct Current
DDNS Dynamic Domain Name System DHCP Dynamic Host Configuration
Protocol
DMZ Demilitarized Zone DNS Domain Name System
DTMF Dual Tone Multi Frequency FXO Foreign Exchange Office
FXS Foreign Exchange Station GMT Greenwich Mean Time
IP Internet Protocol IPsec Internet Protocol Security
L2TP The Layer 2 Tunnel Protocol LAN Local Area Network
WAN Wide Area Network MAC Media Access Control
MII Media Independent Interface NAT Network Address Translation
NTP Network Time Protocol PPTP Point-to-Point Tunneling Protocol
RTP Real-Time Transport Protocol RTCP Real-Time Transport Control
Protocol (also known as RTP