Pelco Manual C1921M-G (1/04) 17
Comm. Type
• In polled communication mode (switch 4 off), one multiplexer (any one) must be
the master. Only one multiplexer can be master; all others must be slaves. The
master multiplexer communicates with the slave multiplexers.
• In non-polled communication mode (switch 4 on), all multiplexers must be
slaves (the keyboard is master).
The default is MASTER for duplex models and MASTER (KBD T/D) for simplex
models.
Relay Output
This operates the relay on the back of the multiplexer. The relay is used to change the
VCR to its alarm recording speed.
• In alarm mode, an alarm signal is produced when a remote switch opens or
closes a ground in the multiplexer (for example, if a switch is on a door and the
door is opened).
• In activity mode, the multiplexer continually monitors select camera inputs for
motion. When motion is detected, the multiplexer increases the frequency with
which that camera(s) is shown and recorded. Activity detection is most effective
when only a few cameras are showing activity (refer to the
Camera Setup
section).
7. When you finish all the changes you want to make, go to EXIT or BASIC SETUP.
8. Press the OPEN key to exit programming mode or go to the basic System Setup
menu.
When HELP is highlighted, you can press the OPEN key to display a help screen that tells
you which keys to press to configure specific options.