NEC DT750 User Manual page 28

1.
7:25 AM MON 12 JUL 2010
FDB
STEP 2: Press FDB, and you will hear a service set
tone (SST).
7:25 AM MON 12 JUL 2010
FDB
STEP 3: Press SPEAKER, and the speaker lamp
turns off.
TRANSFER CANCEL
7:25 AM MON 12 JUL 2010
MIC
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