AT&T MERLIN LEGEND Installation & Maintenance Manual page 603

Adjuncts
Loudspeaker Paging Systems
Connected to a programmable LS or GS line/trunk port for
single-zone or multizone paging. Used to page co-workers and
make announcements through loudspeakers. Wiring diagrams
for different configurations are included in Appendix A.
Note: Since most paging equipment works with an LS port,
programming the port for LS is recommended.
External paging systems, such as PagePac 20 with ZoneMate 9
or ZoneMate 39 paging systems, that use DTMF signaling can
be connected to a line jack programmed for paging operation,
including hi-directional paging.
Zone paging systems, such as the PagePac series, require one
LS jack. Any zone can be used once the paging port is
activated.
A UPAM is used to connect the system to paging equipment that
is not PagePac or is PagePac without ZoneMate. It can be used
on any LS port that is programmed for paging.
Modem
Connected to the system through a single-line telephone jack, an
MFM port on an MLX telephone, or a GPA on an analog multiline
telephone. Modems are used for converting digital signals to
analog, or analog signals to digital, so that digital equipment can
transmit data over telephone lines. When connected through an
MFM, data calls made from the modem are independent of the
associated MLX telephone. Data calls can be dialed from either
the data terminal keyboard or an associated single-line
telephone.
B-16 Adjuncts