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Making Calls
Multiple Connections
Two calls can be made to your handset simultaneously. This means that you can tele-
phone with two parties, toggle between these connections or initiate a 3-party con-
ference. Any further callers will hear a busy signal.
If the system administrator has configured a call queue, further calls will enter this
queue (see also the section Calls in the Call-waiting Queue starting on page 34).
DTMF Postdial/VF Signalling
Depending on the system's configuration, your telephone is automatically set to VF
(voice frequency) signalling in the connection state. You can use this, for example, to
query an answering machine or a voice mailbox. Consult your system administrator if
you have questions concerning this function.
Call-charge Display
If your network operator transmits call charge information, you will see in the
display – for a self dialled external calls – during or after the conversation the amount
for this call.
Redialling
The last call numbers you dialled are stored in the redial list (with the most recent
entry at the top). If a call number is also stored in the OpenCom 100 / Aastra 800 tele-
phone book, you will see the name.
Telephone Lock
You can switch the handset telephone lock on or off using the Protection -
Telephone lock menu after entering your PIN. Switching on the telephone lock
changes dialling rights. You may no longer be able to make external calls or only
make them to a limited extent.
Blocked/Unblocked Call Numbers
Your telephone can be blocked from dialling all or selected external call numbers.
Emergency call numbers (in Germany 110 and 112) can be entered in a special list,
irrespective of your trunk line access rights, and thus always be dialled. Consult your
system administrator for details.
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