Advanced Features3. Fill the value.4. Click the to save the configuration.PrefixTo configure the Prefix via Phone Interface1. Press Menu →Features →Function Keys→Line or Memory keys as Function Keys →Memory key1(for example)2. Select the wanted Line or Memory key.3. Press and or press key to select the Prefix in the type field.4. Enter the value5. Press or Save soft key to save the configurationTo configure the Prefix via Web interface1. Click Function key → Line or Memory key.2. Select the desired Line or Memory key and select Prefix in the Type.3. Fill the value.4. Click the to save the configuration.Then when you press this key, the set value is input directly.63