1. Compatible with KTS & SLT, plug and play
2. Support PC ( call management and bill) software
3. Caller ID transferred
4. Auto Fax detect
5. Least cost routing
6. IP code access automatically
7. Extension password
8. Busy transferred
9.  Unconditional Transferred
10. Call Transferred to Secretary
11. Do Not Disturb(DND)
12. Day and Night service
13. Operator attendant
14. Auto attendant
15. Party Conference ( between 2 extensions and 1 CO line )
16. Party Conference ( among 3 extensions)
17.Outside caller call extension by one touch
18. Extension ring by turns
19. Hot line ( call to operator by lifts handset without dialing)
20. Call to operator by one touch dialing
21. Ringback on busy
22. Speed dialing
23. External music on hold socket
24. Extension outgoing call class
25.Remote program
26. Outside ( CO ) Line Duration Time Limit
27.Monitor voice record
28. Various Outside ( CO ) Line Access Mode Selection
29. Extension number assignable freewill ( 2, 3 or 4 digits)
30. Executive busy override
31.Eight extension ringing assignable
32.Broadcast
33.Twin routes 3 section OGM (DISA)
34.Self-extension number confirmation
35.Pulse and tone mode setting
36.Polarity Reverse Detection