Ericsson LBI-39076B User Manual
Page 20
LBI-39076B
INSTALLATION
20
Table 3 - Configurations by Interface Characteristic (Rev A Main Board)
INTERFACE
JUMPER POSITIONS FOR JP1 THROUGH JP15
FUSES
CHARACTERISTIC
1
2
3
4
5
6
7
8
9
10 11
12
13 14 15
F2
F3
Audio Circuit
2-Wire
B
B
A
A
4-Wire
A+C A+C
B
B
Signaling
Loop Start
A
B
A
Ground Start
B
A
B
A
E&M
C+M
IN IN
E-Lead Reference
External Reference
IN
A
OUT
Internal Ground
OUT
A
IN
Internal -48 V
OUT OUT
B
IN
Idle M-Lead Reference
External Reference
A
IN
not B
OUT
Internal Ground
B
OUT
IN
Internal -48 V
A
OUT
IN
Busy M-Lead Reference
External Reference
E
IN
not B
OUT
Internal Ground
M
OUT
IN
Internal -48 V
E
OUT
IN