peplink Pepwave MAX Series, User Manual

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There are 4 pins i.e. TX, RX, RTS, CTS on the terminal block for serial connection and they
correspond to the pins in a DB-9 connector as follows:
DB-9 Pepwave MAX Terminal Block
Pin 1 –
Pin 2 Rx (rated -+25V)
Pin 3 Tx (rated -+12V)
Pin 4 –
Pin 5 –
Pin 6 –
Pin 7 RTS
Pin 8 CTS
Pin 9 –
The RS232 serial interface is not an isolated RS232. External galvanic isolation may be
added if required.
Be sure to check whether your serial cable is a null modem cable, commonly known as
crossover cable, or a straight through cable. If in doubt, swap Rx and Tx, and RTS and CTS,
at the other end and give it another go.
Once connected, your serial device should be accessible on your Pepwave MAX router
LAN IP address at the specified TCP port.