![background image](http://html1.mh-extra.com/html/zyxel-communications/zonedas/zonedas_user-manual_943563005.webp)
Chapter 1: Introduction
ZoneDAS User Guide
Page | 5
Like the combiner in passive DAS, the BU combines its input signals and sends the combined
signal to each RU. Unlike in passive DAS, cable loss has been compensated for and signal
quality is preserved for every RU. Each RU simply amplifies the signal to its specified strength
and broadcasts it through its antenna(s), up to 4 of which it may fit onto each RU. The RU
has powerful integrated amplifiers (up to 23 dBm per band) and uncompromised low noise
figures (down to 5dB) for optimizing system footprint and thus lowering overall TCO of the
site solution. With ZoneDAS, you can software select between
directional
and
omnidirectional
configurations for optimal coverage and best signal-to-noise ratio. For RUs
configured with external antennas, output signal pattern depends on the antennas
installed. Strategic RU placement and configuration will then ensure optimum coverage
and strong cellular signal.
ZoneDAS is highly scalable
and supports additional coverage through its companion
device, the
Extender
. An Extender is essentially a subsidiary BU: it plugs into the BU like an
RU and supports a brand-new set of RUs. It receives RF signal from the BU, transmits the
signal to its RUs, and sends its RUs' signals back to the BU.
In this guide, “ZoneDAS” refers to the entire BU-RU system. ZoneDAS is capable, flexible,
expandable, and elegantly simple. Its modular design enables it to support operator bands
and frequencies from around the world and ensure future upgradability when new
technologies arrive. Its ability to use CAT5 cables and PoE/RFoE technologies facilitates
cost-effective, quick, and simple deployment, with no need for separate power supplies for
its RUs. In addition, its simple, single-wire RU connections mean easy re-deployments should
the host building undergo modifications to its layout.
Figure 2
ZoneDAS with Extender
Coverage & Applications
ZoneDAS is ideal for medium sized buildings and installations. Its BU connects up to 8 RUs,
each of which supplies cell phone signals for an area up to 2,500m
2
, so a basic ZoneDAS
setup covers up to 20,000m
2
. ZoneDAS is also highly extensible and can service larger areas
when required, through Extenders. Installing an Extender adds capacity for 1~8 additional
RUs, further increasing maximum coverage by 20,000m
2
. With a full complement of 8
Extenders, one ZoneDAS can connect up to 64 RUs for a total coverage area of
160,000m
2
— the area equivalent of 3 football fields! This could represent multiple floors in a
high-rise office/residence, a large factory, or a large shopping center.