The monitoring unit is designed to collect call data from standard telephone lines (trunk or CO lines) coming into your building. It will not work properly if connected to extensions (or station) lines coming from a telephone switch. Connect the unit only to analog loop start, ground start, or Centrex phone lines. It is not designed for ISDN, T1, T3, E1, E3, DID, or Digital Centrex type phone lines

The unit can be connected to a printer or to a computer through a serial port. A serial printer connects using a null modem adapter or null modem cable. A parallel printer requires a serial to parallel converter as well as a null modem adapter. If connected to a computer, the serial port must be free of COM Port and IRQ conflicts and dedicated to the monitoring unit. The unit can work with any serial port regardless of the COM number and/or IRQ it is using.