ADTRAN 1200070L1 - Manual (Page 40)

Chapter 2: Installation
24 Express XL/XLT User Manual 61200.070L1-1
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 XLT
10-Base-T Phone U
Personal
Computer
New Wiring Scheme