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Administrator Guide – AzaCall200 VOIP Multi-Protocol Gateway
Chapter 3.
Equipment Overview
Our equipment device is a VOIP Gateway that delivers voice information over the Internet
instead of the traditional telephone network. This benefits small offices and work-at-home users
having high-speed Internet access by allowing them to use many service providers that offer toll-
free or low-cost voice services. In addition, the VOIP Gateway features a PSTN back-up line,
allowing users to still use the PSTN phone line should the VOIP service become unavailable,
such as when there is a power outage. Equipment configuration via Graphical User Interface
(GUI) is also available, allowing users to easily configure the equipment and software settings
via a web browser like the Internet Explorer. Firmware upgrade via TFTP is also supported,
allowing users to easily add newer and more powerful features to their gateway devices.
3.1. Introduction
The AzaCall200 gateway device is an external stand-alone device, which can provide a cost-
effective long-distance voice communication solution using the Internet. The gateway device can
establish a voice channel by adopting Voice Over Internet Protocol (VOIP) signaling schemes
after registering itself with a designated proxy server. The gateway device can be connected
directly to phones, fax machines, PBXs, and the Internet without any additional accessories or set
ups. When the Ethernet port of the gateway device is connected to another device with a WAN
interface (e.g. ADSL modem), the gateway device can provide toll quality voice communication
in terms of voice quality and reliability for the users.
Also, the gateway device integrates two kinds of data service modes, offering convenience and
flexibility to users. One such mode is the Gateway mode, and the other is the Transparent Bridge
mode. The Gateway mode targets users who have been enjoying high-speed Internet access
service from an ISP, but would like to add an additional subscription to VOIP telephony services.
The gateway device would be deployed to the subscriber’s home, with ADSL service feeding into
the device’s WAN port, and the LAN port connected to the subscriber’s equipment. In this
scenario, the gateway device delivers both voice service, as well as data routing function found in
a broadband router.
Figure 4
Network Environment Using the Multi-Protocol Gateway
Device in Gateway Mode
