dismantled voip phone keypad. buttons on circuit board

16x9 background beige black blue board button buttons circuit closeup colorful communication component design detail digital diode disassembled dismantled electrical electronic electronics engineering green hardware idea industry information internet jumper key keyboard keypad keys macro maintenance metal microswitch microswitches nobody nopeople occupation open over part phone plastic protocol pushbutton pushbuttons repair resistor round semiconductor semiconductors service supply switch switches technical technology telecommunications telephone telephoning transistor voice voip waste wire