Features
Analogue telephone matching with most PABX, PBX and PAX system
Robust body vandal resistant
Busy tone detection for auto release the line if line busy
Dry contact for external control automation 
Auto answer
Full Soft lock: only dial out from phone book 50 memory address number
Half soft lock: limit to dial out starting number, e.g. “00852” area code
High temperature approval 
Ring sound 95 dB dfd in 1 m and 10 ringing tone melodies selectable
Listening by loudspeaker: 70dB in 1m
Phone book memory: 50 address ( name & number) programmable
Stainless steel keypad for dial and manuel
Magnetic reed hook-switch
Telephone line powered. No external power or battery required

                                                                         KNEX1

LCD display include 
Manu setting
Welcome text programmable e.g: welcome to koontech telephone
Full soft lock or half soft lock 
Phone book up to 50 address number selectable
Ring speaker up to 4 level selectable
Hands free talking sound up to 4 level selectable
Handset receiver sound up to 4 level selectable
Up to 9 Ring tone melodies selectable                                        

Back light up to 4 level selectable
The dialing number
Calling time counting