AT&T 555-230-894 用户手册

Install and Wire Telephones and Other Equipment

Issue 1  September 1995  

* External 

alarm, 

with 

signal incoming to switch.

** External 

alarm, 

with 

signal outgoing from switch.

1

Color designation is AA-BB, where AA is the main wire color, and BB is the color of the short
stripe on the wire.

2

For translation purposes, the following wire colors apply in the above table:

W

White

BL

Blue

O

Orange

G

Green

BR

Brown

S

Slate (Grey)

R

Red

BK

Black

Y

Yellow

V

Violet

Y-G

G-Y

43

18

Not Connected

TK

TK

Y-BR

BR-Y

44

19

GND

-48

Aux Power

Ø

LC

LC

Y-S

S-Y

45

20

GND

-48

ST

ST

V-BL

BL-V

46

21

GND

-48

COM1

NO1

COM1

N01

V-O

O-V

47

22

Not Connected

NC2

NC1

NC2

NC1

V-G

G-V

48

23

Ext Alarm A**

Ext Alarm Return

COM2

N02

C0M2 

N02 

V-BR

BR-V

49

24

Not Connected

V-S

S-V

50

25

INADS Tip

INADS Ring

GRD

-48V

GRD

-48V