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RJ21X (CA21A) Connector Pin Assignments
On the 8620 or 8820 BAC is a 50-pin RJ21X (CA21A) Telco connector, labeled
DSL Ports 1–24, associated with the slot where the POTS card resides. It provides the
2-wire interface from each POTS port to the 66 Block.
Table 3
lists the pin assignments for each of these interfaces. Pins 25 and 50 are not
used.
Table 3. RJ21X Connector Pinouts
POTS Port
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Connector Pins (Ring, Tip)
1, 26
2, 27
3, 28
4, 29
5, 30
6, 31
7, 32
8, 33
9, 34
10, 35
11, 36
12, 37
13, 38
14, 39
15, 40
16, 41
17, 42
18, 43
19, 44
20, 45
21, 46
22, 47
23, 48
24, 49
19
25
26
50
02-17151
1
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