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RS232 / RJ45 HELL

RS232 Connectors
RJ45
USR
Cisco
Null
Straight
T1 CSU
Bay28115
T3 ADC csu
db25
db9
db25
db9
db25
db9
db25
db9
db9
loopback
db9
db9
1-blue
20
4
5
8
6
6
20
4
9
11
-
?
2-orange
8
1
8
1
3
2
2
3
1
3
-
?
3-black
6
6
3
2
2
3
3
2
-
9
2
?
4-red
7
5
7
5
5
8
4
7
11
1
-
?
5-green
2
3
7
5
4
7
5
8
3
-
7
?
6-yellow
3
2
2
3
20
4
6
6
-
-
3
?
7-brown
4
7
20
4
7
5
7
5
-
-
-
?
8-white
5
8
4
7
8
1
8
1
-
-
-
?
remove pin 8(white) on db25 for DL3900 doormat connector.


DescriptionConnector to PortmasterCable TypeConnector to Equipment
Cajun P120 SwitchStraight DB25MStandard RJ45No Connector (RJ45 to console port)
3com 1100/3300 SwitchStraight DB25MStandard RJ45Null DB9F
3com US Robotics ModemStraight DB25MStandard RJ45Straight DB25M
AlteonStraight DB25MStandard RJ45Straight DB9M
Ascend TNTStraight DB25MStandard RJ45Straight DB9M
Xedia RouterStraight DB25MStandard RJ45Null DB9F
Cisco 25xx RouterCisco DB25MStandard RJ45No Connector (RJ45 to console port)
Cisco 29xx SwitchCisco DB25MStandard RJ45No Connector (RJ45 to console port)
Cisco 5500 SwitchStraight DB25MRolled RJ45No Connector (RJ45 to console port)
Cisco 75xx RouterStraight DB25MStandard RJ45Straight DB25M
BigIPStraight DB25MStandard RJ45Null DB9F
Motorola FT100 CSU/DSUStraight DB25MStandard RJ45Straight DB9F
ADC Kentrox DataSMART CSU/DSUStraight DB25MStandard RJ45Straight DB9F

Ethernet 10/100Base-T Crossover Cable

This cable can be used to cascade hubs, or for connecting two Ethernet stations back-to-back without a hub. It works with both 10Base-T and 100Base-TX.

RJ45 MALE CONNECTOR to network interface card 1.
RJ45 MALE CONNECTOR to network interface card 2.

Name Pin Pin Name
TX+ 1 3 RX+
TX- 2 6 RX-
RX+ 3 1 TX+
RX- 6 2 TX-

Ethernet cross over diagram
Note 1: It's important that each pair is kept as a pair. TX+ & TX- must be in the pair, and RX+ & RX- must together in another pair. (Just as the table above shows).
Note 2: You could also connect 4-4, 5-5, 7-7, 8-8.



RJ11 PIN OUTS



RJ45 PIN OUTS

Far left is pin 1, Far right is pin 8


 Conversion list
10BaseT      DB25 DB9
Primary/secondary
1-whi/org           2---3
2-org/whi           3--2
3-whi/grn           4---7
4-blu/whi           5---8
5-whi-blu           6---6
6-grn/whi           7---5
7-whi/brn           8---1
8-brn/whi         20---4



50 Pair wiring color standards
25 pair cable's color code table WikiPedia
25 pair cable's color code table

T568(a & b) diagrams
Straight through wiring.
GigE Crossover wiring (uses all 4 pairs)

Banded & Solid / Wiring Pair Color Codes:

Pair # ID Pin #
T568B		 Band
code		 Pin #
USOC		 Solid
code
1 T1 5 White/Blue 5 Red
R1 4 Blue(White) 4 Green
2 T2 1 White/Orange 6 Black
R2 2 Orange(White) 3 Yellow
3 T3 3 White/Green 7 Orange
R3 6 Green(White) 2 Blue
4 T4 7 White/Brown 8 Slate
R4 8 Brown(White) 1 Brown