BT Versatility - Do Not Disturb

Call Barring
Extensions are entered into different Classes for barring purposes. There are 5 classes
selected under ‘Extension’ programming. There are also four tables of codes selected in
‘System’ programming which determine additional codes that are barred or allowed:
• Select ‘Extensions’.
• Select Restriction classes.
• Select ‘Day class of service’ or ‘Night class of service’.
• Select the class and enter the extensions.
• Class 1 is no calls barred.
• Class 2 is International calls barred. Also any additional codes added to Table 2 in
Class codes programming are barred.
• Class 3 is National and International numbers barred. Also any additional codes in
Tables 2 and 3 in Class codes programming are barred.
• Class 5 is associated with extensions when codes entered in the ‘Allowed Table’ in
Class codes programming are to be allowed. This is combined with Classes 2 and 3.
• Class 6 is the additional restriction codes in the Restricted Table in Class Codes
programming. These can be combined with Classes 1, 2 and 3.
Note: As the BT Versatility can support both ISDN and Analogue, it may be necessary to
enable features for ISDN and Analogue options on the same system.
BT Versatility
Installation and Maintenance Manual
Programming
48