Taken from the Norstar MICS 7.0 OAM documentation: Configuring the second dial tone table Installer password required This feature, introduced in the MICS 6.1 Maintenance Release, provides dial tone for outgoing calls on any PRI line, based on the digits dialed. Digits dialed must match an entry in the second dial tone table to enable a second dial tone. Dial tone occurs on the line until another digit is dialed, a timeout occurs, or the user hangs up. Up to 10 separate entries can be stored in the second dial tone table. The maximum digit length for each entry is four. Each entry must be unique and cannot conflict with: ò Internal DNs ò Hunt Group DNs ò DISA DNs ò Auto DNs ò Target line DNs Programming the second dial tone table takes place in Services under Routing Service/2nd Dial Tone. 1. Press SHOW. The display shows None defined. 2. Press ADD to enter a number from one to four digits long or press BKSP to erase a digit. 3. Press OK to accept the number. The display shows 2DT: <number>. 4. Press ADD to enter another number in the second dial tone table or press REMOVE to delete the current entry, then enter a new number. 5. Repeat steps 2 to 4 to assign up to 10 entries in the table.