Key Management Systems Ltd
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P a g e
Communications
Module
The previously built-in 2G mobile communication has been replaced with an
interchangeable Communications Module or ‘CM’.
An upgraded 4G modem, combined CATO with on board RS232 and RS485
communications, Wi-Fi and gigabit Ethernet will be available in the future, model
specific. This not only provides greater flexibility in installation but allows for future
upgrade and alternative means of external communications. For instance, the 4G
modem can be dropped for Ethernet or Wi-Fi, furthermore additional Mk3 System
Controllers can be connected to a ‘CM
-
MAX’ distributing local intelligence where the
system requires greater security.
The Communications Module will eventually be available in four different versions.
Each variant has been designed with certain communication solutions in mind.
Customers can choose a CM to suit their needs at the time of order.
The 4G modem uses a standard size SIM and has no user programmable functions.
A standard SMA input is provided for the antenna. The antenna should be as close as
possible to the controller to ensure the best signal strength. This means using the
shortest possible cable available whilst still fitting the antenna in the best external
location. A large excess of antenna cable will only reduce signal strength at the
modem, a small excess should be tidied whilst also trying to avoid the formation of
coils. If the excess is great, then the next lowest size of antenna should be used.
A non-steered roaming SIM is provided with each System Controller capable of
roaming all networks. These are provided by KMS who manage the SIM contracts. A
customer may want to provide their own SIM, in this case the modem requires
different configuration. Please contact KMS Technical Support for more information.
