gprsInitialString 1.3.6.1.4.1.8691.2.8.1.3.15.2.5.4

Set the modem's initial string to establish the connection. E.g., 'AT&S0=1' for auto-answer. Note: NPort 6150, 6250, 6250-S-SC, 6250-M-SC do not support write access.