Instruction manual

The 4400-Series Telephone Family
3-7
4400-Series Telephones
4424LD+ 3
The 4424LD+ telephone has a seven-line display with eleven softkeys and 24
line buttons. Each line button has an associated pair of LEDs. Because of the
larger display, you must use the external power supply that comes with the
4424LD+ telephone.
The fixed buttons on the 4424LD+ telephone are:
■ Volume
■ Hold
■ Conf (Conference)
■ Trnsfr (Transfer)
■ Redial
■ Spkr (Speaker)
■ Mute
■ Menu
■
■
■
Exit
You can use the 4424LD+ telephone as a Direct-Line Console (DLC) or as a
Queued Call Console (QCC). You can also use the 4424LD+ telephone as the
system programming console. This telephone’s functionality is almost identical
to the MLX-20L telephone.
The 4424LD+ telephone can have one or two DSS4450s attached to it.
The power supply provided with the 4424LD+ telephone provides
enough power to handle the DSS4450s as well.