Ericsson LBI-39076B system manual Jumper Positions for JP1 Through JP15 Fuses

LBI-39076B INSTALLATION

Table 3 - Configurations by Interface Characteristic (Rev A Main Board)

INTERFACE

CHARACTERISTIC

Audio Circuit

2-Wire

4-Wire

Signaling

Loop Start

Ground Start

E&M

E-Lead Reference

External Reference

Internal Ground

Internal -48 V

Idle M-Lead Reference

External Reference

Internal Ground

Internal -48 V

Busy M-Lead Reference

External Reference

Internal Ground

Internal -48 V

1

A B A

E

M

E

JUMPER POSITIONS FOR JP1 THROUGH JP15

FUSES

2

3

4

5

6

7

8

9

10

11

12

13

14

15

F2

F3

B

B

A

A

A+C

A+C

B

B

A

B

A

B

A

B

A

C+M

IN

IN

IN

A

OUT

OUT

A

IN

OUT

OUT

B

IN

IN

not B

OUT

OUT

IN

OUT

IN

IN

not B

OUT

OUT

IN

OUT

IN

20