Zhone 4821-A2 User Manual
Connectors and Pin Assignments
44
BitStorm 4800 Express Model 4821-A2 Installation Guide
4821-A2-ZN21-30
DSL Ports Connectors
The 50-pin RJ21X Telco connectors labeled DSL Ports 1–24 and (on the
48-port model) DSL Ports 25–48 provide the 2-wire loop interface from each
DSL port to the POTS splitter. The Canadian designation for this connector is
CA21A.
48-port model) DSL Ports 25–48 provide the 2-wire loop interface from each
DSL port to the POTS splitter. The Canadian designation for this connector is
CA21A.
lists the pin assignments for these interfaces. Note that Pins 25 and 50
are not used.
Table 5: DSL Connector Pinouts
DSL Port
Connector Pins
(Ring, Tip)
(Ring, Tip)
1 or 25
1, 26
2 or 26
2, 27
3 or 27
3, 28
4 or 28
4, 29
5 or 29
5, 30
6 or 30
6, 31
7 or 31
7, 32
8 or 32
8, 33
9 or 33
9, 34
10 or 34
10, 35
11 or 35
11, 36
12 or 36
12, 37
13 or 37
13, 38
14 or 38
14, 39
15 or 39
15, 40
16 or 40
16, 41
17 or 41
17, 42
18 or 42
18, 43
19 or 43
19, 44
20 or 44
20, 45
21 or 45
21, 46
22 or 46
22, 47
23 or 47
23, 48
24 or 48
24, 49
25
02-17151
1
50
26