Adjusting Existing Category 5 Cabling To Run 1000Base-T; Rj-21 Port Pin Assignments - Accton Technology VM2524 Installation Manual

Cables

Adjusting Existing Category 5 Cabling to Run 1000BASE-T

If your existing Category 5 installation does not meet one of the test parameters for
1000BASE-T, there are basically three measures that can be applied to try and
correct the problem:
1. Replace any Category 5 patch cables with high-performance Category 5e
cables.
2. Reduce the number of connectors used in the link.
3. Reconnect some of the connectors in the link.

RJ-21 Port Pin Assignments

The PBX/MDF connector is designed to aggregate 24 POTS/ISDN ports. Each wire
pair must be attached to the RJ-21 connector in a specific orientation detailed below.
The following tables shows the pin assignments.
Pins Circuit
1,26 1,Ring/Tip
2,27 2,Ring/Tip
3,28 3,Ring/Tip
4,29 4,Ring/Tip
5,30 5,Ring/Tip
6,31 6,Ring/Tip
The VDSL Line connector is designed to aggregate 24 VDSL ports. The following
table shows the pin assignments.
Pins Circuit
1,26 Port 1
2,27 Port 2
3,28 Port 3
4,29 Port 4
5,30 Port 5
6,31 Port 6
B-4
25
50
Pins Circuit
7,32 7,Ring/Tip
8,33 8,Ring/Tip
9,34 9,Ring/Tip
10,35 10,Ring/Tip 16,41
11,36 11,Ring/Tip 17,42
12,37 12,Ring/Tip 18,43
Pins Circuit
7,32 Port 7
8,33 Port 8
9,34 Port 9
10,35 Port 10
11,36 Port 11
12,37 Port 12
1
26
Pins Circuit
13,38 13,Ring/Tip 19,44
14,39 14,Ring/Tip 20,45
15,40 15,Ring/Tip 21,46
16,Ring/Tip 22,47
17,Ring/Tip 23,48
18,Ring/Tip 24,49
Pins Circuit
13,38 Port 13
14,39 Port 14
15,40 Port 15
16,41 Port 16
17,42 Port 17
18,43 Port 18
female
connector
Pins Circuit
19,Ring/Tip
20,Ring/Tip
21,Ring/Tip
22,Ring/Tip
23,Ring/Tip
24,Ring/Tip
Pins Circuit
19,44 Port 19
20,45 Port 20
21,46 Port 21
22,47 Port 22
23,48 Port 23
24,49 Port 24