2 RS-232 connect cable made method
QT-500 has standard DB9 RS-232 interface, like PC COM port.
Pin definition
It means DVR input and O means DVR output.
Pin
index
Name I/O
Description
1 DCD I Carrier
Detect
2 RXD I Receive
Data
3 TXD O
Transfer
Data
4 DTR O
Terminal
Device
Ready
5 GND Ground
6 -- --
--
7
RTS
O
Request to Send
8 CTS I Clear
Data
Summary of Contents for QT-500 Series
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Page 115: ...firmware file are setup and run correctly After upgrade finished press any key to reboot DVR...