Supply smart Key Phone system PABX

Features:
1) Any extension ports compatible with our two-wire key telephone and
    limitless quantity
2) Use it directly after connected
3) Flexible extension number assignment ( 2, 3 or 4 digits)
4) FSK / DTMF caller ID, internal and external caller ID transferred
5) Extension password
6) Different class for extension
7) Second outward code
8) Discretional ringing extension assignment when operator attendant, two
    operator extensions assignment when auto attendant
9) 3 pieces OGM for auto-attendant use
10) Day and night service
11) Extension call to operator by one touch button
12) Busy transferred, unconditional transferred and do not disturb
13) Ten difference groups for extensions and CO lines
14) Call transfer, three parties' conference, caller ID transferred
15) Support PC call management software, have reverse detect function can
     have nicety bill after apply reverse detect service from telecom office
16) Internal "call bill memory" and clock to ensure system can record the bill
     even when PP call management software is not started
17) PC voice record software optional
18) Remote program function to make the maintenance easier