User Manual for COLOSSUS Series Embedded Net DVR
LJD Digital Security Ltd
Page
99
of
107
Copyright © 2005. All rights reserved.
tool for RJ45, one electric iron, and some soldering tin.
Pin definition
To make the RJ45 according to the following pin definition; I means DVR input, 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 CTS I
Clear
Data
5 RTS O
Request
to
Send
6
DTR
O
Terminal Device Ready
7 GND
Ground
8 Null
—
—
According to demand, the following three situations are considered to make the serial port
plug-in according to the corresponding relationship of the pin definition.
(1) When the serial port of the DVR is connected with the DTE device with DB25 plug-in
(terminal like computer, annunciator, door access etc), the corrresponding relationship is as
follows:
Connection for RJ45 and DB25 (DTE)
(2) When the serial port of the DVR is connected with DTE device with DB9 plug-in, the
corresponding relationship is as follows:
