Bosch Integral TM13 Operating Instructions Manual page 134

If in doubt, look it up
You can choose between five different lock levels (not included as a standard fea-
ture. Please consult your BOSCH TELECOM service representative if required).
Setting the lock levels -
Menu
COS 1: 1..5 'Lock±
134
Protecting the phone from unauthorized users A
Select the desired menu item.
'Lock
Specify the desired lock level using a digit
key.
You can choose one of the following op-
tions:
1 Emergency calls only
2 Emergency calls and internal calls
3 Emergency calls, internal calls, code
dialing, TA and AEI
4 Disable settings changes
5 No lock
Confirm your selection.
Enter
You can now lock your phone.
Note:
After three unsuccessful attempts to unlock
the phone, it will be blocked for 15 minutes.