The corresponding relationship of cross cable

2 RS-232 connect cable made method

DVR-802x 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

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