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Use of an external S
the Instructions)
Important:
On system phones, this function is called via the menu/phone app
(optional, see manual for the phone).
To use this function at ISDN phones or to delete it again, this function
must be supported via a function key or via the menu by the respective
phone (optional, see manual for the phone).
Note: You can also use this function on analogue phones, where it can
be performed via the T-Net function key/menu (optional, see manual for
the phone). Instead of the announcement by the public exchange, you
will hear the confirmation tone.
If no one answers on the connection you are calling, proceed as follows:
1. Press the Flash key or the Query key.
2. Dial *37#.
You will hear the confirmation tone.
Note: If you do not hear a confirmation tone, the callback request was
rejected by the public exchange.
3. Hang up the receiver.
As soon as the connection has been used, you are called by the public
exchange for a period of 20 seconds.
COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
port for the call (optional, see Technical Data in
0
Phoning
Unsuccessful Outgoing Calls
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