Q-See QSD42908 - Manual (Page 94)

QSD42908 User’s Manual
94
2 How to Make a RS-232 Connect Cable
QSD42908 has standard DB9 RS-232 interface, like PC COM port.
Pin definition
I 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
3 How to Make a UTP network Connect Cable
Material and tool
One twist cable (8 pin, the length can be defined as to the actual demand, but must be within
100m), 2 standard RJ45 head, one tool for RJ45.
Suggestion: have a network cable test tool to test each cable made.
Pin definition
To make the network cable according to your actual needs there are two options:
(1) Use the following method to make the network cable when DVR is connected to a
network hub or switch.
The corresponding relationship of the direct cable