9H423-26 Cabling Requirements
A-4
Figure A-3. RJ21 Connector
The RJ21 connector is a D-shaped metal housing that is wired and crimped to a
25-pair UTP cable (Figure A-4).
Figure A-4. RJ21 Pinout
The RJ21 connector has one pair that is unconnected: pair 25, which corresponds
to pins 25 and 50 on the RJ21. It is left floating. This “Telco” connector utilizes the
standard EIA/TIA 568A wiring scheme. Refer to Table A-2.
25-Pair Cable
Contact Pins
1845n17
49
27
26
2
1
+
-
Transmit
Transmit
Receive
Receive
50
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1845n18
Summary of Contents for SmartSwitch 9000
Page 1: ...SmartSwitch 9000 9H423 26 User s Guide 9032242 02 ...
Page 2: ......
Page 30: ...Operation 3 10 ...
Page 34: ...LANVIEW LEDs 4 4 ...
Page 38: ...Specifications 5 4 ...