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12. RS-232 & RS-485 Protocol
IMPORTANT: This section is designed to allow users to control the DVR via the RS -232 and
RS-485 ports. The following information is intended to be used by qualified professionals.
Do not make any changes to your system’s settings unless instructed by a qualified
technician.
12.1 Setup
12.1.1 Use a Null Modem cable (the standard RS-232 9 Pin Cable with Pin 2 and Pin 3 exchanged,
see pin configuration chart below for details) to connect the COM 1 on the rear panel of the
DVR to a PC.
12.1.2 Set the RS -232 option to ON in the COMMUNICATION page of the setup menu.
12.1.3 Set the PC communication parameters: 9600 bps, No Parity, 8 Data Bits, 1 Stop Bit.