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DVR Connection
Since the DVR ground is normally part of the CCTV ground it
should be connected directly to the ground of the VSI-Pro. If
you are using the TXD output of the VSI-Pro to the DVR, Reg-
com, Networker or Vnetworker then you should use an AVE
“Multifunction Cable Adapter” directly on the rear of the VSI-
Pro and then use the Opto232 after that connection to the
cash register. The Multifunction cable will wire the TXD signal
with the VSI-Pro ground directly to the DVR before the Op-
to232 and isolate the ground from the DVR from the cash reg-
ister. If you wish to isolate the ground of the VSI-Pro from the
DVR then you should use another Opto232 or that purpose. It
is not recommended to connect the DVR ground to the cash
register ground but in many cases for properly installed CCTV
systems this will be okay.
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Other Connections
Jumpers are provided in the Opto232 to defeat standard RS-
232C Hardware handshaking functions without special cable
wiring. It allows you to short RTS and CTS together and/or
DTR and DSR together via convenient jumpers.