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Outdated Drivers Can cause hardware related Errors. Check your PC Drivers now.

RPI+ 2nd generation WITH DRIVERS String Explaination

RPI+ 2nd generation WITH DRIVERS

AT&F&C1&D2&K3+H11S95=1

AT: (beginning of most inits) Attention!

&F: Sets the values loaded in the active profile to the values that are set in the default profile.

&C1: DCD enabled after a carrier signal is detected

&D2: DTR drop causes modem to hang up

&K3: Enable RTS/CTS flow control

+H11: Enable RPI+ mode

S95=1: Use DCE when reporting CONNECT result codes