1) Card expansion structure, expandable freely
2) Wire / wireless flexible assembled
3) 3 pieces OGM for auto-attendant
4) Small message group sending
5) Internal and external caller ID
6) Caller ID transferred
7) Call forwarding
8) Power switch (80V to 260V)
9) Internal back-up battery (24 hours)
10) Ring back when no answer
11) Call pick up, help to make external call by assistant
12) Inquiry transferred / 3 way conference (1 CO + 2 Ext)
13) Call forwarding / ringing extension assignment
14) Internal or external music on holding
15) Flash time selection
16) Various external dialing mode
17) Trunk group
18) Outgoing call restriction
19) Self-report extension number and ringing detection
20) Voice record for CO line or extension by telephone voice recorder
21) Supplies reverse signal (wireless card)
22) Auto IP dialing (wireless card)
23) Receives and sends fax by PHS wireless card
24) Thunder protection (3Kv) and resist interference