Stanley QEL 200 User Manual page 72

Gateways provide bi-directional radio frequency communication between Wireless Locksets
and the associated host computer(s). All communications are via secure AES 128-Bit encrypted
2.4 HGz using spread spectrum RF Radio technology. The Gateway communicates to the host
computer through web services via either Ethernet 10/100 BaseT, or an approved commercial RF
carrier-enabling a wireless solution end-to-end.
Range
Transmit range from Gateway to lockset varies based on building construction and wifi noise.
Site characteristics such as reinforced concrete walls could interfere or weaken the signal;
open spaces and low interference can increase signal strength.
Stanley transfers information between devices in the form of data packets over the 2.4
GHz ISM band. This band frequency is very heavily used in many devices such as wireless
computer networks (802.11 b and g) and cordless phones, which increases the risk of
lost packets, that is, packets that do not make it from a lockset to a Gateway because
of interference. Interference can also reduce lockset battery life due to the constant re-
broadcasting of packets and lost connections to the gateways.
To achieve maximum efficiency in wireless system, the frequency range must be managed
effectively. Therefore, the installer must know the positions and channels of all the 2.4 GHz
wireless devices in the segment and ensure channels are assigned to each device so that
there is minimum frequency overlap with adjacent or nearby devices.
Extended Range
It is likely that you will have locations in your segment separated by distances greater than
300 feet. You may want to consider adding a Gateway to extend the transmit range or
purchasing a ceiling mount antenna.
Power Supply
Gateways must be located near lockset(s) and either two options:
1
Access to Ethernet 10/100 Base T network connection.
2
Access to a dedicated power source where they can recieve 24 VDC power from a AC to
DC transformer. Ensure that the gateway is plugged into a 24/7 power circuit that cannot
be turned off at a switch, such as a light switch that might be turned off by a cleaning
crew.
Wireless System
71