Auerswald COMpact 4000 Operation Manual page 131

Telephoning
Outgoing Calls
Initiating an External Call with Calling Line Identity Restriction
Connection > Configuring Control Commands). If you want to use the feature
directly on the exchange line instead, the subscriber needs the authorisation
for configuring features to be configured by the network provider.
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COMpact 4000 - Firmware V6.6A - Installation, Operation and Configuration V03 03/2016