GPS/Cellular Messenger Support Notes
Battery Life Test Results(msg-TechNote3.pdf - 26 KB)Results of tests performed and their effect on vehicle battery for GPS/Cellular Messenger.
JRC Cellphone Menus(msg-AppNote4.pdf - 497 KB)Describes the cellphone menu structure, how to navigate it, what the valid values are for each parameter and how to access and display the current settings for GPS/Cellular Messenger.
Firmware Update Procedures(msg-TechNote1.pdf - 329 KB)Step-by-step guide to updating the GPS/Cellular Messenger unit with new firmware program.
Accessing Total Used Cellular Air Time(msg-AppNote2.pdf - 116 KB)Describes how to access the total air time used on GPS/Cellular Messenger for cellular calls. This is not billable cellular time.
Initial Control Channels and Roam Inhibit Flag(msg-AppNote3.pdf - 148 KB)Describes how to change the initial control (also referred to as data) channels and the roam inhibit flag in GPS/Cellular Messenger. The cellular telephone, by default, roams system A for channels in the range 312..333 and for system B for channels in the range 334..355. Do not undertake this change without the approval of your cellular carrier.
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