Features:
1) Min. lines: 2 - 8
2) Max. lines: 8 - 32
3) Expansion (function board)
4) Expansion (extension and CO line)
5) Multiple communication lines
6) Normal transformed power
7) Switch power with backup battery interface (optional)
8) Billing software (including program, optional)
9) Power failure transfer
10) External line caller ID
11) Transfer caller ID (optional)
12) Intercom caller ID
13) Auto-attendant (DISA: 20s, three paragraphs)
14) Outgoing message recording
15) Automatic CO distinguishing
16) External music input on holding
17) Internal music on holding
18) Day / night mode (optional)
19) Door bell and door opener (optional)
20) Alarm clock (optional)
21) Remote programming
22) Real time clock (optional)
23) Memory protection while power off
24) Automatic / operator mode
25) System password
26) Flexible extension number assignment
27) Multiple dial-out modes
28) External line group
29) Call duration control
30) Call pickup
31) Outgoing call transfer
32) Call transfer
33) Call forwarding
34) Flexible coding (change extension number)
35) Do not disturb
36) Automatic Ext reporting
37) Flash time choice
38) Ringing assignment
39) Call restriction
40) Three way conference
41) CO line transfer to CO line
42) Call all extensions
43) Specific CO line dialing
44) Ring identify
45) CO line booking
46) CO line reservation
47) Operator setting
48) CO monitor

49) Keyphone function + Trasfer Caller ID (Optional)