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Simple RJ45 DB9 Cisco console cable
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4 Steps

 

Step 1: Getting Started - Bill of Material





First we start with the parts:

Cat5e cable (mine has 6ft.);
1 RJ45 Connector;
1 DB9 Connector;
Crimp tool;
Soldering Iron.

Step 2: Crimping the RJ45 connector



Lets start crimping the RJ45 connector. I personally use TIA/EIA 568A wiring diagram to all my cables, so I will continue doing so:



If you never crimped a RJ45 before, please refer to this video:

(credit: video from cablesupply.com)


There are many videos/sites showing how to crimp.

Just make sure you follow, in this case, TIA/EIA 568A wiring diagram

Step 3: Connectiing the DB9


The following diagram shows how each cable, by color, should be connected:


CAT5 DB9 Pin
Green-White 8
Green 6
Orange-White 2
Blue 5
Blue-White 5
Orange 3
Brown-White 4
Brown 7


The Blue/White and Blue must both connect to pin 5 on the DB9. Pins 1 and 9 are not connected.


This is the RS232 Pins assignment (for reference)

Pin 1 - Received Line Signal Detector (Data Carrier Detect)
Pin 2 - Received Data
Pin 3 - Transmit Data
Pin 4 - Data Terminal Ready
Pin 5 - Signal Ground
Pin 6 - Data Set Ready
Pin 7 - Request To Send
Pin 8 - Clear To Send
Pin 9 - Ring Indicator

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