T1 12-PORT ACCESS MULTIPLEXOR MODULE
2.2 Port Pinout
The T1 RJ-21 has the following pinout.
Port
Pin
1
26
1
2
27
2
3
28
3
4
29
4
5
30
5
6
31
6
7
32
7
8
33
8
9
34
9
10
35
10
11
36
11
12
37
12
8
Table 2-4. T1 RJ-21 Pinout
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
RxT
RxR
Pin
39
14
40
15
41
16
42
17
43
18
44
19
45
20
46
21
47
22
48
23
49
24
50
25
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR
TxT
TxR