AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 110

Hardware Components
One end of a 4-pair cord plugs into the V.T. jack on the back of the GPA, and
the other end plugs into the OTHER jack on the underside of the telephone.
The 1-or 2-pair cord from the T/R device plugs into the TEL. EQUIP. jack on
the GPA (see Figure 2-14).
Control Unit
Figure 2-14. GPA Connections
Sliding the switch on the back of the GPA to the proper setting provides the
GPA service required.
Basic. This setting is used to dial and answer calls on an analog
multiline telephone or to attach a T/R device such as a single-line
telephone or a fax machine. Incoming calls ring only on the analog
multiline telephone.
2-36 Adapters and Adjuncts
D4BU
D8W-87
Line
Other
A n a l o g
Multiline
Telephone
( R E A R )
TIP/Ring Device
Genreal Purpose
Adapter
(REAR)
D8AC