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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
111
Table 3.5.5. shows the contact assignments of RJ21 type connector on PFTU.
Punch-Down PFTU
connector
PFTU
PFT
Block Pin
Pair
Pin
Color-Code Designation
Circuit
1
1
26
WH/BL
COT1-IN
1
st
Circuit
2 1
BL/WH
COR1-IN
3 2
27
WH/OR
COT1-OUT
4 2
OR/WH
COR1-OUT
5 3
28
WH/GN
TEL1-T
6 3
GN/WH
TEL1-R
7 4
29
WH/BN
SLIB1-T
8 4
BN/WH
SLIB1-R
9
5
30
WH/SL
COT2-IN
2
nd
Circuit
10 5
SL/WH
COR2-IN
11 6 31
RD/BL
COT2-OUT
12 6
BL/RD
COR2-OUT
13 7 32
RD/OR
TEL2-T
14 7
OR/RD
TEL2-R
15 8 33
RD/GN
SLIB2-T
16 8
GN/RD
SLIB2-R
17
9
34
RD/BN
COT3-IN
3
rd
Circuit
18 9
BN/RD
COR3-IN
19 10 35
RD/SL
COT3-OUT
20 10
SL/RD
COR3-OUT
21 11 36
BK/BL
TEL3-T
22 11
BL/BK
TEL3-R
23 12 37
BK/OR
SLIB3-T
24 12
OR/BK
SLIB3-R
25
13
38
BK/GN
COT4-IN
4
th
Circuit
26 13
GN/BK
COR4-IN
27 14 39
BK/BN
COT4-OUT
28 14
BN/BK
COR4-OUT
29 15 40
BK/SL
TEL4-T
30 15
SL/BK
TEL4-R
31 16 41
YL/BL
SLIB4-T
32 16
BL/YL
SLIB4-R
33
17
42
YL/OR
COT5-IN
5
th
Circuit
34 17
OR/YL
COR5-IN
35 18 43
YL/GN
COT5-OUT
36 18
GN/YL
COR5-OUT
37 19 44
YL/BN
TEL5-T
38 19
BN/YL
TEL5-R
39 20 45
YL/SL
SLIB5-T
40 20
SL/YL
SLIB5-R
BL:BLUE
41
21
46
VI/BL
COT6-IN
6
th
Circuit
BK:BLACK
42 21
BL/VI
COR6-IN
BN:BROWN
43 22 47
VI/OR
COT6-OUT
OR:ORANGE
44 22
OR/VI
COR6-OUT
WH:WHITE
45 23 48
VI/GN
TEL6-T
GN:GREEN
46 23
GN/VI
TEL6-R
SL: SLIVER
47 24 49
VI/BN
SLIB6-T
VI:VIOLET
48 24
BN/VI
SLIB6-R
RD:RED
49
25
50
VI/SL
-
-
YL:YELLOW
50 25
SL/VI
-
Table 3.5.5.5
PFTU Wiring