Basic Functions:
1. Multiple communication line
2. Normal transform power
3. Power failure transfer
4. External line caller ID
5. Internal music on holding
6. Remote programming
7. Memory protect while power off
8. System password
9. Multiple dial-out mode
*0. External line group
*1. Call duration control
*2. Call pickup
*3. Outgoing call transfer
*4. Call transfer
*5. Call forwarding
*6. Flexible coding (change ext. No. )
*7. Do not disturb
*8. Automatic Ext. Reporting
*9. Flash time choice
*0. Ringing assignment
*1. Call restriction
*2. Three way conference
*3. Call all extensions
*4. Specific CO line dialing
*5. Ring identify
*6. CO line booking
*7. CO line reservation
*8. Operator setting
*9. CO line monitor.
