MODEM_OPTION_LENGTH
unsigned char ModemOption[MODEM_OPTION_LENGTH];
MODEM_OPTION_LENGTH, CTRL_TIMEOUT);
static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
static unsigned char ModemOption[MODEM_OPTION_LENGTH];
memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);