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ANNEX B. Cable Specifications
RJ-21
(Left)
12
37
13
38
E&M-2M Module Cable
Cable Shape
Cable Signaling and Pinout
Pin
Signal
1
SB
2
M-lead
3
R
4
R or R1
5
T or T1
6
T
7
E-lead
8
SG
102
RJ-21
Signal
(Right)
name
12
TIP 12
37
RING 12
13
TIP 13
38
RING 13
Figure A.10 E&M-2M Module Cable
Two-Wire Operation,
Description
1
-48 V signaling
-
battery
Signaling input
M
Ring, audio input
-
Ring, audio
R
input/output or
output
Tip, audio input/
T
output or output
Tip, audio input
-
Signaling output
E
Signaling ground
-
return
RJ-21
RJ-21
(Left)
(Right)
25
25
50
50
-
-
Four-Wire Operation,
Type
2
3
5
1
SB
SB
-
-
M
M
M
M
-
-
-
R
R
R
R
R1
T
T
T
T1
-
-
-
T
E
E
E
E
SG
SG
-
-
© SAMSUNG Electronics Co., Ltd.
(Continued)
Signal
name
TIP 25
RING 25
-
Type
2
3
5
SB
SB
-
M
M
M
R
R
R
R1
R1
R1
T1
T1
T1
T
T
T
E
E
E
SG
SG
-
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