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O
THER USEFUL FEATURES
12.7 Malicious Call Tracing
If you are being disturbed by bothersome or malicious external incoming
calls, it is possible to request number tracing from the network provider.
Tracing can be invoked during or after an ongoing conversation. The
external line can be held for a limited period of time.
When a malicious call is received, a signal can be sent to the switched
telephone network (PSTN) before a call is disconnected. If the calling
subscriber clears the call, the external line can be held for a limited
period of time to invoke the malicious call tracing (MCT).
It is possible to assign a shortcut key to MCT. Contact the system admin-
istrator.
12.7.1 Ordering Malicious Call Tracing
To order MCT during a call, press the MCT shortcut key:
• If the request is accepted, the shortcut key indicator is lit, a text
message is displayed, and an acceptance tone is heard.
• If the request is rejected, the shortcut key indicator flashes rapidly,
a text message is displayed, and a reject tone is heard
Note: If no shortcut has been programmed, press Hold and dial *39#.
12.8 Direct Inward System Access (DISA)
If you are assigned to use the Direct Inward System Access (DISA)
feature and you are working externally, you can call your office and get
access to an external line in order to make business calls. The business
call will be charged to your office extension number or an account
number. You will only be charged for the call to the office.
The external phone must be of push button type provided with a pound
key (#) and a star key (*), or a mobile phone adapted for dial tone pulses
(DTMF). After a completed call you must hang up before a new call can
be made.
The procedure varies depending on whether you use an account code
or not, and whether you use a common or individual authorization code.
12.8.1 Calling With a Common Authorization Code
1. Call the DISA feature at your office.
Wait for dial tone.
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