Polarity
NT
3
TE
2
8-Pin
1
1
Pins 1, 2, 7, and 8 are not used.
2
TE refers to terminal-terminating layer 1 aspects of TE1, TA, and NT functional groups (this applies to
ISDN BRI S/T WIC).
3
NT refers to network-terminating layer 1 aspects of NT1 and NT2 functional groups.
The following table lists the connector signals and pinouts for ISDN BRI U Port Signals and Pinouts (RJ-45).
Table 23: ISDN BRI U Port Signals and Pinouts (RJ-45)
Function
8-Pin
1
No connection
3
Signal
—
Tip or Ring
4
Signal
—
Tip or Ring
5
1
Pins 1, 2, 7, and 8 are not used.
E&M Pinouts
The following table lists the connector signals and pinouts for an E&M port
Table 24: E&M Pinouts
Four-Wire Operation, Type
Two-Wire Operation, Type
Description
Signal
Pin
4
3
2
1
4
3
2
1
—
SB
SB
—
—
—
SB
—
-48V
signaling
battery
SM
1
M
M
M
M
M
M
M
M
Signaling
input
M-lead
2
R
R
R
R
—
—
—
—
Ring,
audio
input
R
3
R1
R1
R1
R1
R
R
R
R
Ring,
audio
input/output
or
output
R or
R1
4
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Cable Specifications and Information
E&M Pinouts
