6
2 Operating overview
2.1 Displays and tones
The handset is on hook, open
listening / Hands-free operation is
not switched on. There is no actual
call. In the bottom line the TC-
system at which the telephone is currently being operated is displayed.
The display gives you information on date and time in the top line. If
possible, the display is controlled by the ISDN network. Date and time
are synchronized after the first outgoing call you make with the
telephone and then kept by the telephone. The displays are aligned with
the data of the exchange at every external outgoing call. (also set of time
and desk via menu)
If no key is pressed for 60 seconds during an operating sequence, the unit
returns to the idle condition with almost all operations!
Handset was lifted or the function
open listening/hands-free operation
switched on. The telephone is ready
to dial a telephone number.
The telephone is located outside the
transmitting range of the selected
TC-System or is not logged in.
The display contrast can be altered in the idle condition of the telephone
using the adjustment keys (”+” and ”-”) in 4 levels. To increase the
contrast, press the ”+” key, to decrease it, the ”-” key.
0,1 s 0,1 s 0,1 s 0,1 s 0,1 s 0,1 s 0,1 s
2 Operating
Advisory tones during operation: Acknowledge tones
Pos. acknow
ledge tone
Neg.
acknow-
ledge tone
– Programming completed
successfully
– Incorrect operation
Idle condition
Ready-to-dial-
condition
”No System”
Display contrast
