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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
106
3.5.4.6
Contact Assignments of RJ21 Type Connectors on Extension Boards.
Table 3.5.4.6.a. shows the contact assignments of RJ21 type connector on DTIB12/DTIB24.
Punch-Down DTIB
connector
DTIB
Port
Block Pin
Pair
Pin
Color-Code Designation
No
1
1
26
WH/BL
DT-1
0
DTIB12/24
2
1
BL/WH
DR-1
3 2
27
WH/OR
DT-2
1
4
2
OR/WH
DR-2
5 3
28
WH/GN
DT-3
2
6
3
GN/WH
DR-3
7 4
29
WH/BN
DT-4
3
8
4
BN/WH
DR-4
9 5
30
WH/SL
DT-5
4
10 5
SL/WH
DR-5
11 6
31
RD/BL
DT-6
5
12 6
BL/RD
DR-6
13 7
32
RD/OR
DT-7
6
14 7
OR/RD
DR-7
15 8
33
RD/GN
DT-8
7
16 8
GN/RD
DR-8
17 9
34
RD/BN
DT-9
8
18 9
BN/RD
DR-9
19 10
35
RD/SL
DT-10
9
20
10
SL/RD
DR-10
21 11
36
BK/BL
DT-11
10
22
11
BL/BK
DR-11
23 12
37
BK/OR
DT-12
11
24
12
OR/BK
DR-12
DTIB12/24
25
13
38
BK/GN
DT-13
12
DTIB24 only
26
13
GN/BK
DR-13
27 14
39
BK/BN
DT-14
13
28
14
BN/BK
DR-14
29 15
40
BK/SL
DT-15
14
30
15
SL/BK
DR-15
31 16
41
YL/BL
DT-16
15
32
16
BL/YL
DR-16
33 17
42
YL/OR
DT-17
16
34
17
OR/YL
DR-17
35 18
43
YL/GN
DT-18
17
36
18
GN/YL
DR-18
37 19
44
YL/BN
DT-19
18
38
19
BN/YL
DR-19
39 20
45
YL/SL
DT-20
19
40
20
SL/YL
DR-20
BL:BLUE
41 21
46
VI/BL
DT-21
20
BK:BLACK
42
21
BL/VI
DR-21
BN:BROWN
43 22
47
VI/OR
DT-22
21
OR:ORANGE
44
22
OR/VI
DR-22
WH:WHITE
45 23
48
VI/GN
DT-23
22
GN:GREEN
46
23
GN/VI
DR-23
SL: SLIVER
47 24
49
VI/BN
DT-24
23
VI:VIOLET
48
24
BN/VI
DR-24
RD:RED
49 25
50
VI/SL - -
YL:YELLOW
50
25
SL/VI
- -
Table 3.5.4.6.a
DTIB12/DTIB24 Wiring