AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 109

Hardware Components
Answering machines
Fax machines
Modems
Credit card verification terminals
Cordless telephones
2500-type (basic touch-tone) telephones
Supplemental alerts such as bells, chimes, horns, and strobes notify people in
noisy areas of incoming calls.
The MFM is shipped with a KS29911 , L2 or L2 power unit that supports one MFM
and one DSS. When two DSSs are connected to a telephone, a 329A wall
power unit is used instead of the KS22911. With either type of power unit, the
total cord length can be no more than 50 feet (15 meters) from the telephone.
The MFM supports only touch-tone dialing and does not detect pulse-dialing.
Also, the MFM does not support features activated by a switchhook flash, so no
transfer or conference calls can be made from a station attached to an MFM.
NOTE:
The MFM uses one of the two B-channels when it is active. This means that
when an accessory, such as a fax machine, and the MLX telephone are in
use at the same time, Voice Announce to Busy and speakerphone paging
cannot be used, (When Voice Announce to Busy is being used, a person
calling an MFM extension gets a busy signal; a person attempting to call out
from a station attached to an MFM will not get a dial tone.)
Two jumper blocks on the MFM configure it for either tip/ring (T/R) or
supplemental alert operation. These are preset at the factory for T/R operation.
NOTE:
Only a qualified service technician or an authorized dealer representative
should change the jumper settings.
In the T/R mode, the MFM can connect to 20-Hz AC external alerting devices
such as a loud external ringer and El CM-type ringer. If several devices are
connected to the MFM, only one device can be off-hook at a time and the total
ringer equivalent number (REN) < = 2.0.
General Purpose Adapter
A General Purpose Adapter (GPA) permits the attachment of a T/R device such
as a single-line telephone, modem, or answering machine to an analog multiline
telephone. The device must be touch-tone, not rotary, and calls must be
originated on the analog multiline telephone since the GPA has no pulse or
touch-tone detectors.
Adapters and Adjuncts 2-35