The Honeywell CDMA-L57 is the first AlarmNet cellular communicator for the LYNX Touch panels that supports the Verizon (CDMA 1X RTT) cellular network. Traditionally, AlarmNet cellular modules used SIM cards that relied on GSM technology on the AT&T cellular network. Honeywell has been guaranteed CDMA-1x coverage from Verizon until 2022.
The CDMA-L57 is designed specifically for the LYNX Touch L5210 and L7000 panels. They must be Revision 8 or higher. If you have a revision 7, L5210 or L7000 you can get a firmware update via WIFI. This requires the Honeywell L5100-WIFI which can also be used in dual path setup as a primary communication path. If you have one of the earlier LYNX Touch systems such as the L5000, L5100, or L5200 you will need to upgrade the system to the L5210 or L7000.
LYNX Touch owners can now choose between the Honeywell 3GL (AT&T) and the CDMA-L57 (Verizon) for cellular communications. Depending on which network has a stronger signal in your area you now have a choice. This makes the LYNX Touch series security systems more versatile when it comes to optimizing the communications out to your central station monitoring provider.
Unlike the AT&T network, Verizon's CDMA network does not use SIM cards. Instead the modules are hardcoded and can be activated remotely by an AlarmNet dealer. Just like any other module for the LYNX Touch family, this unit connects directly to the board by opening up the keypad. It is mounted just left of center on the board. There is a multi-pin connector used a mating chip to connect cellular module with the proper port on the board. Always power down your panel before installing new modules with your panel.
The CDMA-L57 will transmit and receive signals from the AlarmNet server. This is owned, operated by Honeywell and uses AES encryption to ensure secure communications with your security system. Depending on the service you sign up for, AlarmNet cellular radio will support traditional central station monitoring and self monitoring via Total Connect 2.0. Essentially the signals are sent from the panel to AlarmNet. Then they can be redirected to the TC 2.0 app and/or central station operators that are trained to verify the alarm and dispatch the authorities when needed.
Just like the 3GL, the CDMA-L57 can serve as a primary communication path or a redundant path to a WIFI connection via the L5100-WIFI. Either way, cellular communications are the most reliable way to monitor an alarm system. In the event of power loss, the system can use the backup battery to transmit signals. Generally the cellular data is bundled into the monthly rate for monitoring. That way you pay one flat rate that includes everything.
If you are in an a situation with marginal to poor signal for Verizon and AT&T I recommend using a cellular amplifier. Antennas are a good solution when you have good signal just not exactly where the panel is. ZBoost and WeBoost make quality cell amps.