Access to Vital Information –
from the Safety of the Police Vehicle
What is the
maximum distance I can be from your Surveillance Access Unit while still being
able to successfully connect?
The effective range is about 100 meters.
How many wireless clients can connect to the SAU simultaneously?
We recommend no more than 10 simultaneous connections to the SAU.
Can we have more than one SAU in each location?
Yes, we can configure the SAUs to communicate with each other in a mesh network
to expand the network connectivity range
Will handheld PDA or Cell phone devices work with your technology?
There are several limitations to handheld devices. The device must
be 802.11x Wi-Fi enabled and include an internet web browser. If our SAU is
connected to a DVR recording device, there may also be a limitation in that most DVR
devices support ActiveX only. If you wish to view video on a DVR, you will
probably be limited to Windows Mobile devices using Internet Explorer.
When connecting to the SAU, are logs created to track a unique device connecting
and at what time?
This feature will be added to the product in the coming months.
Does the SAU and DVR synchronize time between themselves?
Not currently. This feature will be added to the product in coming months.
Does your system support Pan/Tilt/Zoom (PTZ) Technology?
Depending on the functionality of cameras installed and their compatibility with
the DVR purchased, the SAU will support PTZ capabilities.
Can I watch video that is not live?
Yes, you should have full DVR functionality.
Should the SAU be connected to an uninterruptible power supply?
Yes, the SAU should be plugged into a battery backup that also has line
conditioning in case of electrical spikes due to lightning storms, or faulty
wiring. In the event of a loss of power, the SAU will continue to be available
for the duration of the battery life of the UPS.
What’s to stop a hacker from abusing your system?
There is a physical limitation of 100 meters connectivity from the SAU. Hackers
would need to be within that 100 meter distance to even attempt to connect to
the SAU. Full encryption and password protection further protect the system from
Can anyone connect to the SAU if they have a Wi-Fi enabled device and are within
100 meters of the SAU?
No. Because web-based communications between the SAU and the
user's laptop are not broadcast, unauthorized persons are unable to see the name
of the SSID. Further, thanks to the encryption algorithm, even if a third party
knew the name but did not have the encryption key, they would not be able to
connect with the system.
Can multiple police cruisers or emergency response vehicles be setup to use this
functionality, or can we only have one vehicle at a time using the technology?
Multiple devices can be connected to the SAU at any given time. All police
cruisers or other emergency response vehicles can be configured to connect to
any given SAU.
Do we need any special equipment in the emergency response vehicles to connect
to your SAU?
Yes, you must have an 802.11g or 802.11n Wi-Fi enabled laptop or pda to connect
to the SAU.
What makes your technology different?
Our technology consists of a closed loop, encrypted system. We are able to send
data at a high rate of speed by using 802.11g wireless technology. Our SAU is
difficult to hack because you must be physically within 100 meters of the
device. We also offer pre-staged information regarding the location in question,
with industry standard web servers easily viewed with existing, preinstalled
Information changes fairly often in our environment. How can the web content be
changed on your SAU?
ESS has web developers to work with you regarding any
changes that you need. Once changes have been made, a USB flash disk will be
sent to you with your web content. Simply unplug the SAU, replace the existing
USB flash disk with the new flash disk provided to you by ESS and power the SAU
back on. The new web content will be displayed to first responders once
Can we place an SAU in each building on our campus?
Yes, the maximum distance for each SAU is 100 meters. ESS can help you architect
a solution to provide complete coverage on your campus.
Where should the SAU be located in our building?
The SAU should be located near a window in close proximity to where emergency
responders will gather during a crisis situation. It should be inconspicuously
placed where students or other non-authorized personnel cannot see it.