ADTRAN L128 - Manual (Page 41)

Chapter 2: Installation
24 Express L128/L128T User Manual 61202.070L1-1
Figure 2-1
Wiring Scheme 1:
Use existing analog telephone equipment, but replace
single analog telephone service with ISDN service
To
Telephone
Company
Yellow
Red
Green
Black
To
Telephone
Company
Yellow
Red
Green
Black
Express L128/L128T
10-Base-T Phone U
Personal
Computer
New Wiring Scheme