1.Caller ID for C.O Lines.           

2.Outline calling on duty manual/automatic mode.            

3.Single section of digital recording can be 10 seconds             

4.When calling no one answer or the line is busy can be transferred .       

5.Calling level for extension and the talking time is limited .           

6.The extension number ranges can be mixed .          

7.Outline calls can be answered the Phone for Others , transfer, retention, monitor .       

8. Remote maintenance.