Features Specifications:sell pabx system  pabx(CPS-PA1696) Features: 1,c.o. line 4-16 ext. line 16-96 2,expansion(ext &c.o. line) 3,multiple communications line 16 4,switch power & backup battery interface 5,billing software(optional) 6,reverse polarity signal 7,external line caller ID 8,transfer caller ID& intercom caller ID (optional) 9,auto-attendant 2 line (disa:20s three paragaphs)(optional) 10,auto/operator mode 11,auto IP dialing(optional) 12,external music input on holding 13,internal music on holding 14,day/night mode &real time clock 15,doorbell &door open function 16,alarm clock 17,remote programming 18,memory protect while power off 99 private passwords 19,system password 20,multiple dial-out mode 21,external line group 22,call duration control 23,call pickup 24,outgoing call transfer 25,call transfer 26,call forwarding 27,flexible coding (change ext.No.) 28,automatic ext.reporting 29,flash time choice 30,call restriction groups by 8 digitals prefix 31,three way conference 32,c.o. line transfer to c.o.line 33.call all entensions 34,specific c.o. line dialing 35,ring identify 36,c.o. line booking 37,c.o. line reservation 38,operator setting 39,call monitor 40,enternal broadcasting interface 41,key phone function(optional) 42,less cost routing(lcr) 43,routing by 8 digitals prefix 44,ext.group 45,atuo-redialing 46,wireless c.o. line module