User ManualPMM5544 User Manual Use this manual to set up, connect, test, and operate your PMM5544 modem system. Start HereGetting StartedRefer to the Getting Started section for the following procedures to get started with your Popoto Modem system: Connecting the modem Preparing an air-test environment Connecting the modems using RS-422 and running the application Opening a PShell session via telnet Verifying communication Sending test commands .