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Introduction to Your Extension
MD Evolution – Dialog 4223 Professional
14
Tones, Voice Announcements, and Ring
Tones
Over and above visual information displayed on your extension’s
screen and LEDs, there are also various tones, voice announcements
and ring tones that signal the status of your extension, or certain
associated services.
The tones heard are applied under the following conditions and
with the following timing and frequency:
Internal dial tone • Heard each time the handset is picked up from your
extension (excluding all activated special services).
330 Hz Continuous
External dial tone • Heard when a network prefix or an external call is dialled.
424 Hz Continuous
Ringback tone • Heard when you call an extension that is free.
1,5 sec. On/3,5 sec. Off
Call on-hold or call
camp-on tone
• Heard when you call an extension that is busy and your call
has been placed on automatic camp-on, or when your call is
placed on-hold by a third party set.
424 Hz 2 consec. beeps, rep. every 5 sec.
Busy tone • Heard when you call an extension that is busy, but automatic
camp-on is not possible for your call, or when a service
request on your extension is refused.
424 Hz 0,5 sec. On/0,5 sec. Off
Call waiting presentation
tone
• Heard when you receive a new call, when your extension is
already busy.
424 Hz Only 1 ring signal, not repeated
Special dial tone • Heard each time your extension’s handset is picked up, when
there is a call forwarded active for your extension, or when it
is the recipient of a call forward for a third party set (apart
from other special activated services).
424+330 Hz 0,75 sec. On/0,75 sec. Off
Re-routing on call forward • Heard when you call an extension that has a call forward that
is active, when the call forward is executed.
424 Hz 0,05 sec. On/0,05 sec. Off
Intrusion or call offer tone • Heard when a third party – typically an attendant – intervenes
during your current call.
424 Hz 2 consec. beeps, rep. every 1,4 sec.
Service Acceptance tone • Heard when a request for service is accepted on your
extension.
Melody Multi-toned melody – continuous.