AT Initialization Settings Must be Reset upon Power-Cycling
(Reference SDM IRM pg. 6-6, 6-15, 6-69, 7-7, 7-9)
First-Generation Globalstar devices (GSP-1600, -1620, -2900) do not have the ability to save any AT modem configuration settings. Therefore, if any AT commands must be used to configuration the modem to communicate with a user device, the AT commands must be reissued whenever the GSP-1620 modem is power-cycled or whenever the modem wakes from sleep mode.