Telephones And Consoles - AT&T MERLIN LEGEND Installation & Maintenance Manual

System Description

Telephones and Consoles

Several different analog and single-line telephones work with the
system; however, the only digital telephones that work with the
system are the digital/ISDN (MLX) telephones.
W A R N I N G
An analog or digital multiline telephone located in a different
building but within 1000 feet of the CU requires an IROB (in-
range out-of-building) protector at each building entrance.
See Appendix C for ordering information on these telephones.
MLX Telephones
There are four new telephones in the MLX telephone line, all of
which support ISDN capabilities:
MLX-20L™ telephone
MLX-28D™ telephone
MLX-10D™ telephone
MLX-10™ telephone
Some features are common to all MLX telephones:
programmable line and feature buttons with two associated
lights (red and green)
Note: An MLX-20L telephone used as a QCC has no
programmable buttons.
dedicated feature buttons (four have a red or green light)
red message-waiting light
built-in speakerphone
volume control for speakerphone, handset, and ringer
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