Bosch Integral TS13 Operating Instructions Manual page 100

Isdn telephone. connected to integral 33 systems
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You can choose between five different lock levels (not included as a standard
feature; consult your BOSCH TELECOM service representative, if necessary).
Unlocking the telephone
Menu
Setting the lock levels -
Menu
BER 1: 1..5 'Locking±
100
Protecting the phone from unauthorized users A
Select the desired menu item.
'Lockµ
Enter the PIN code.
You can use your phone again as usual.
Note:
If you enter an incorrect PIN number
three times consecutively, the telephone
is blocked for 15 minutes.
Select the menu item for locking and
'Lockµ
unlocking.
Enter the desired locking level.
with the number keys.
You have the following selection:
1 Only emergency calling free
2 Emergency calling and internal
calling free
3 Emergency calling, internal calling,
coded dialing, TA and AEI free
4 Setting blocked
5 No lock
You can lock your telephone now.

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