AT Commands User Manual the cases specified for each concerned command; in case of text parameters, the default value is an empty string, except the cases specified for each concerned command. 2.4 Information responses and result codes Information responses start and end with when V1 is enabled and with when V0 is enabled. If the command syntax is wrong CME ERROR: unknown is sent. If the parameters are wrong +CME ERROR: or +CMS ERROR: is sent. gives hints to the kind of the error. If no SIM- card is present or the PIN was not correctly entered, +CME ERROR: is sent for the most commands. If the command line could be performed successfully, the string OK is sent.
In the following description are intentionally omitted. 3 General behaviors 3.1 Start up and initialization A complete start up can take place only with a SIM-card with disabled PIN-check. For a SIM-card with enabled PINM check the most commands are answered with +CME ERROR: SIM-PIN requested. After entering PIN via +CPIN command, which allows a start up completion, a lot of SIM-files will be read; it is possible that some commands are affected for a few seconds. The serial interface driver does not allow a new command, until the old one is terminated by OK or +CME ERROR: . If at start up the MS detects inconsistencies related to the NVRAM the following message is displayed: “!
NVR DOES NOT FIT TO SW- VERSION. NVR-update is needed!” 8