Signal Intelligence offers a variety of remote monitoring
Spectrum Sentry Netô
Server/Remote Server Lite
Monitoring Appliance I
Remote Monitoring Appliance II
Monitoring radio communications in remote areas poses
unique challenges. Remote access to receivers is frequently required in the news
media, public safety, law enforcement, government and two-way communities. By
locating a radio receiver at a remote site, the coverage area can be extended
beyond the existing radio horizon. Signal Intelligence remote monitoring
solutions simplify the task of installing and operating remote receivers by
utilizing existing network infrastructure to provide both control and audio
features over a single low-speed data link.
A Remote Monitoring installation has two points of
A Remote Monitoring Appliance (RMA) located at the
A base station PC running the Spectrum Series base station
control software. Each base station can control multiple remote sites.
At the remote location, the appliance communicates with
the attached radio receiver over an RS-232 or IEEE-488 interface. Audio from the
receiver is digitized by the RMA. The RMA accepts incoming connections over the
network (Ethernet TCP/IP) from the base station. When connected, received audio
is compressed and blended with status information, and then transmitted to the
base station over the network link. Status information includes frequency, PL
tones, and ID codes. Additionally, control and programming commands received
from the base station are sent to the radio.
At the base station, connections to remote locations are
initiated and monitored. As audio and status data is received, the audio is
rendered on the base station sound card and speakers, and the status information
is displayed to the user on a graphical user interface (GUI). Control commands,
such as scan or pause, are sent to the remote receiver from the GUI. Individual
volume controls are supplied for each remote receiver.
Radio programming is performed by the base station, and
can be password protected.
The base station has a record and playback feature that
allows received audio from each remote location to be stored on the base station
hard drive for later playback. The recorder is full duplex, meaning that
recording continues even when playing back an earlier sound bite.
Remote Monitoring Appliance (RMA)
At the remote site, an RMA device is used. Using an RMA
device has several advantages. Since itís not a personal computer you donít need
to worry about rebooting the device. It doesn't
have a hard drive or other external peripherals, so maintenance is simplified. The RMA
Mini Box version is small, rugged
and low power, providing more installation options, including mobile and
The RMA is available in both mini box and rack mount
|RMA Mini Box - 12V DC Power
||RMA 1RU - Rack Mount
RCIP Receiver Control Protocol
All Signal Intelligence remote monitoring products use
the RCIP protocol to communicate between the base station and remote site.
Signal Intelligence developed the RCIP proprietary protocol to enable high
performance remote receiver control over standard network infrastructure. RCIP
goes beyond standard VOIP solutions to deliver reliable remote access, even over
slow or congested networks.
RCIP is highly optimized to maximize throughput and
minimize bandwidth requirements. Both audio and control data is compressed,
allowing network bandwidths as low as 30 kBPS to be used.
RCIP is also engineered to minimize the effects of
network path delay and varying transmission conditions. This allows satellite
links to be used.
Since the RCIP protocol works over any IP network, a
wide variety of networks can be used. Possibilities include DSL, wireless
Ethernet, LAN, WAN, microwave, satellite or the Internet.
Easy Setup and Use
The Spectrum Series software and the RMA are designed
for easy setup and use. In many cases the RMA device can be used directly, with
no initial setup necessary.
The RMA provides a remote management feature that allows
system managers to interrogate the device remotely without disrupting ongoing
activity. In addition, all configuration of the RMA device is done remotely.
Signal Intelligence has experience in designing and
implementing complete systems. We can provide system design, installation,
training and priority support.