Rj-21 port pin assignments – Accton Technology VM2548 User Manual
Page 48
Cables
B-4
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.
The VDSL Line connector is designed to aggregate 24 VDSL ports. The following
table shows the pin assignments.
Pins
Circuit
Pins
Circuit
Pins
Circuit
Pins
Circuit
1,26
1,Ring/Tip
7,32
7,Ring/Tip
13,38
13,Ring/Tip 19,44
19,Ring/Tip
2,27
2,Ring/Tip
8,33
8,Ring/Tip
14,39
14,Ring/Tip 20,45
20,Ring/Tip
3,28
3,Ring/Tip
9,34
9,Ring/Tip
15,40
15,Ring/Tip 21,46
21,Ring/Tip
4,29
4,Ring/Tip
10,35
10,Ring/Tip 16,41
16,Ring/Tip 22,47
22,Ring/Tip
5,30
5,Ring/Tip
11,36
11,Ring/Tip 17,42
17,Ring/Tip 23,48
23,Ring/Tip
6,31
6,Ring/Tip
12,37
12,Ring/Tip 18,43
18,Ring/Tip 24,49
24,Ring/Tip
Pins
Circuit
Pins
Circuit
Pins
Circuit
Pins
Circuit
1,26
Port 1
7,32
Port 7
13,38
Port 13
19,44
Port 19
2,27
Port 2
8,33
Port 8
14,39
Port 14
20,45
Port 20
3,28
Port 3
9,34
Port 9
15,40
Port 15
21,46
Port 21
4,29
Port 4
10,35
Port 10
16,41
Port 16
22,47
Port 22
5,30
Port 5
11,36
Port 11
17,42
Port 17
23,48
Port 23
6,31
Port 6
12,37
Port 12
18,43
Port 18
24,49
Port 24
1
25
50
26
female
connector