¾ 2-15 ¾
Audible Indication
Category Interval (sec) Location
Intercom Off-Hook Signaling Tone
(DSS Console)
450/16 Hz AM
Intercom Ring-Back Tone 450/16 Hz AM
Intercom Dial Tone 400 Hz
Intercom Busy Tone 400 Hz
Intercom DND Tone 400 Hz
Intercom Unobtainable Tone 400 Hz
Intercom Callback Recall 600/450/16 Hz FM
Emergency Alarm 1
600 Hz (TEL)
800 Hz (EX-SPK)
Emergency Alarm 2
600 Hz (TEL)
800 Hz (EX-SPK)
Alarm Clock 600 Hz
Call Forward/Follow-Me Accepted 600 Hz 1 Splash
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