DETEWE OpenPhone 28, User Manual

Page: 29 / 84

27
Making Calls General Information
Visual Call Indicator
The receiver symbol
¢
in the dis-
play flashes and the display illumi-
nation is switched on to indicate an
incoming call.
Time / Alarm
In the idle state the display shows
the current system time. The system
time is automatically updated after
an external conversation. After the
first commissioning or after a bat-
tery change it might take a moment
for the current time to be transferred
from the OpenCom 100.
The handset provides you with a
programmable alarm function. See
page 65 for more details.
Internal and External Call
Numbers
The internal and external call num-
bers at which you can be reached are
assigned when your OpenCom 100
communications system is set up.
Multiple Connections
Two calls can be made to your hand-
set simultaneously. This means that
you can telephone with two parties,
toggle between these connections
or initiate a 3-party conference.
Any further callers will hear a busy
signal.
If the system administrator has con-
figured a call queue, further calls will
enter this queue (see also the sec-
tion
Calls in the Call-waiting Queue
starting on page 30).
DTMF Postdial/
VF Signalling
In the connection state your tele-
phone is automatically set to VF
(voice frequency) signalling. You can
use this, for example, to query an an-
swering machine or a voicebox. Con-
sult your system administrator if you
have questions concerning this func-
tion.
Call-charge Display
If your network operator transmits
call charge information, you will see
in the display – for a self dialled ex-
ternal calls – during or after the con-
versation 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 telephone book, you
will see the name.