The Honeywell GSM-EXT is an AlarmNet external antenna cable used for adding an external GSM antenna to the GSMVLP5 or GSMVLP5-4G cellular alarm communicators. The GSMVLP5 is a cellular alarm communicator compatible with the original L5000 LYNX Touch wireless security system and the GSMVLP5-4G is a cellular alarm communicator compatible with the newer L5100 LYNX Touch wireless security system. Sometimes, when installing a LYNX Touch security system that uses cellular alarm communications, the cellular signal strength is not adequate from where the LYNX Touch alarm control panel is mounted. Therefore, you would have to add an external antenna to the GSMVLP5 or GSMVLP5-4G cellular alarm communicators that fit inside the LYNX Touch control panel to get a better point of cellular reception. The GSM-EXT is the cable that allows you to do that.
Due to the antenna connector on the AlarmNet GSMVLP5 and GSMVLP5-4G communicators, the normal K14207LF cable that is used to connect other AlarmNet cellular communicators to an external antenna cannot be used. However, the GSM-EXT cable provides the needed link between the LYNX Touch cellular alarm communicators and an external antenna. Once a GSM-EXT has been added, you are able to connect a GSM-ANT or GSM-ANT3DB external antenna to a GSMVLP5 or GSMVLP5-4G cellular alarm communicator. The GSM-ANT is an indoor flat blade antenna with a ten foot cord that allows you to extend the cellular point of reception up to ten feet from your LYNX Touch wireless security system. The GSM-ANT3DB is a weatherproof 3dB antenna that you can mount indoors or outdoors. While the GSM-ANT is a standalone antenna that connects directly to the GSM-EXT, the GSM-ANT3DB requires some extra connector cables.
There are a few different options for adding a GSM-ANT3DB weatherproof antenna to the Honeywell GSM-EXT antenna cable. You can use the GSM-3DBKT antenna kit, but then you will need to add a coax extension cable as well. The 7626-5 coax cable provides five feet of extension cable. The 7626-25HC provides up to twenty five feet of extension cable and the 7626-50HC provides up to fifty feet of extension cable. Of course, there is also the GSM3DB25KT external antenna kit. The GSM3DB25KT, added to a GSM-EXT, provides you with everything you need to mount a GSM-ANT3DB up to twenty five feet from your LYNX Touch cellular security system. If you need to go up to fifty feet from the LYNX Touch, so that you can mount the GSM-ANT3DB antenna outside, you should add the GSM3DB50KT antenna kit to the GSM-EXT external antenna cable.
The internal antenna connector on the GSMVLP5 and GSMVLP5-4G cellular alarm communicators is very delicate. Therefore, we urge you to be very careful when installing your GSM-EXT antenna cable. To install the Honeywell GSM-EXT, first power down your LYNX Touch alarm control panel by removing the back up battery and unplugging the power supply from the wall. You can then remove the cellular alarm communicator from the LYNX Touch alarm control panel. Next, you will need to remove the two screws that hold the communicator’s circuit board to the plastic housing. Once you have removed the circuit board, you will need to flip it over and very carefully remove the PH8 wireless module which is a gold rectangular module. You will notice that there is a connector along the edge of the PH8 module and you should grip the device on the side that has the connector. Also, there is an antenna cable that connects the PH8 to the circuit board, so be careful not to pull too hard when removing the PH8. Once you have the PH8 disconnected, carefully remove the antenna cable from the PH8 and from the circuit board. You can then connect the GSM-EXT cable to the antenna connector on the PH8. With the GSM-EXT connected, you can reconnect the PH8 to the circuit board and screw the circuit board back into the plastic housing. Make sure not to pinch the GSM-EXT cable when screwing the circuit board back into place. Finally, reinstall the GSMVLP5 or GSMVLP5-4G cellular communicator inside the LYNX Touch control panel and route the GSM-EXT cable so it exits through the backside of the LYNX Touch. There is a tie wrap point that should be used to secure the GSM-EXT to the inside of the LYNX Touch. You can then connect your GSM-ANT or GSM-ANT3DB antenna kit to the GSM-EXT and power the LYNX Touch back up.