Mitel SX-200 Practices page 221

Features
Campon Warning Tone
Description
When a device camps on to an extension or hunt group, a warning tone
is sent to the extension user over the current call. The warning tone can
be programmed to repeat every 5 to 15 seconds.
Conditions
The following conditions apply to this feature:
A different tone is given for internal and external calls. When an indus-
try-standard telephone or SUPERSETtelephone calls, a single burst
of 440 Hz tone is given for 200 ms. For trunks and consoles calling, a
double burst of the same tone is given.
The tone is not heard by other parties involved in the call with the busy
extension, but a short silent period may be noticed.
COS Options 242 (Repeated Campon Beeps) and 216 (Data Security)
are mutually exclusive.
COS Option 216 (Data Security) prevents the tone from being applied
to particular extensions. This has no effect on the SWAP CAMPON
feature.
Repeated campon beeps applies only when trunks are camped on.
Trunks camped onto extensions with Repeated Campon Beeps do not
recall.
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