AASTRA DT690 - Manual (Page 103)

1424-EN/LZT103 088 Uen F5 2012-03-14 103
O THER U SEFUL F EATURES
Common Night Service
All incoming calls to the operator are transferred to one specific
extension. Answer the call in the normal way.
Individual Night Service
Selected external calls to the operator are transferred to one
specific extension. Answer the call in the normal way.
Universal Night Service
All incoming calls to the operator are transferred to a universal
signaling device, for example the common bell. Answer the call as
described in 16.2 Common Bell Group on page 96.
18.5 Emergency Mode
In the event of an emergency, the operator can set the exchange into
emergency mode, during which only pre-programmed extensions are
permitted to make calls. If your extension is not assigned with this cate-
gory and you try to make a call, you will not receive a dial tone.
18.6 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.
18.6.1 Ordering Call Tracing
To order call tracing during an ongoing conversation, do the following:
1. Press R.
Wait for a dial tone.
2. Press *39#.
The system acknowledges with different tones whether the tracing
request was accepted or rejected.