得伯乐科技有限公司
DBL Technology Limited
RoIP-302 User Manual
Web:
www.dbltek.com
Tel: +86 755 8829 0211
III. Overview
The fundamental of RoIP
（
Radio over IP
）
technology is to convert the audio and PTT signals in
a radio terminal into IP packets and then transmit the data via the IP networks. The challenge in this
technology is to insure that the audio is transmitted in real time and the PPT control signal is
transmitted
immediately and reliably. The radio range is general limited by the restricted transmitting power,
the antenna sensitivity, and other environmental factors. The success deployment of this technology
extends the coverage of a radio network without using expensive repeaters or links up multiple
radio networks in the world. In addition, this technology can also link up the radio world to the
VoIP world and the cellular world easily. It truly makes voice communications across multiple
networks possible.
RoIP302 series is developed based on VoIP technology to realize RoIP functions in order to
create a new type of gateway to bridge voice communications across multiple networks (Radio,
Cellular, VoIP). Its main advantages are low bandwidth usage, high fault tolerant, low loss in voice
quality, fast response, easy installation and configuration. It is ideal for setting up a private network
with multiple voice communication platforms, a distributed network for remote management, a
network with extended coverage, and an integrated network of multiple amateur radio networks.
RoIP302 Series Cross-Network Gateway has 3 PTT interfaces. Up to 3 audio channels from
radio networks can be connected to the RoIP302 simultaneously. All 3 channels can be
programmed into the same or different groups in order to bridge real time voice communications to
various network interfaces.
RoIP302 Series has a built-in GSM / CDMA cellular phone module, user can access the radio
networks connected via the cellular network installed. A radio terminal equipped with DTMF
generation capability can make an outgoing call via the cellular network as well. This links up the
two networks which cannot be linked up via any traditional means.
RoIP302 Series gateway can also be a remote ON/OFF Switch. User can control the built-in
relay to switch on or off the devices that are under control. These devices could be an alarm signal,a
light, a public announce system, an electronic lock, etc.
RoIP302 Series gateway supports routing of IP voice stream to via a recording server. Voice
records can then be saved to a hard disk and can be retrieved at any time for examinations.
RoIP302 Series gateway can be installed in IP networks with intranet or internet connections
via ADSL modem, Cable modem, or Local Area Network (LAN). The unique built-in DDNS client
can help to simplify the installation and configuration without relying on a voice relay server in
order to achieve interconnections among RoIP302 Series gateways.
