Tip: connecting a serial device to the IP network with Pepwave MAX
Selected Pepwave MAX routers feature a RS-232 serial interface on the built-in terminal block. The RS-232 serial interface can be used to connect to a serial device and make it accessible over an TCP/IP network.
The serial interface can be enabled and parameters can be set on the web admin page under Advanced > UART. Make sure they match the serial device you are connecting to.
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 DE-9 connector as follow.
| DE-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 double, swap Rx and Tx, and RTS and CTS, at the other end for a try.
Once connected, your serial device should be accessible on your Pepwave MAX router LAN IP address at the specified TCP port.