Chapter 5: System operation
152 MCDU operation
immediately to all handsets connected to the SDU. For more
information on the predefined profile TAKEOFLANDING see RING
PROFILES on page 156.
For an overview over the menus of the MCDU se Menu tree for the MCDU
on page 213.
LOCK menu
The SDU can be locked so that new calls can not be initiated with handsets
connected to the SDU. Locking the system will also block the user interface
on all Full Feature Handsets and MCDUs. Note that a Normal User PIN code
must be defined before you can use this feature.
To lock all handsets connected to the SDU and all MCDUs, do as follows:
1. Enter the LOCK view.
2. Type in the Normal User PIN code.
3. Select button next to PIN code.
4. All SDU user interfaces are now locked.
5. To unlock the SDU type in the Normal User PIN code and select the
button next to the PIN code. All user interfaces will be unlocked.
If you have forgotten the PIN code, contact your aircraft installation and
service center or your local distributor.
The lock function applies only to the SDU and handsets
connected to the SDU. It does not prevent users from
initiating calls and start new data sessions from devices
connected to the SBU while the SDU is locked.
If power cycling the system while it is locked, it will stay locked
after power up.
You can unlock a single Full Feature Handset by typing in the
Normal user PIN code in that handset and pressing
C.
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