NEC Aspirephone - Office Use - MODEL #:...

Question

I have searching the internet for a user guide for our office telephone for instance; I would like to reset to the correct time and date and also our SHOP extension line is blinking constantly, unable to use the intercom button for the SHOP extension and also it is states that when you try to push the SHOP button it gives a constant busy signal and says that it is in OVERDRIVE. I would like to correct this but I am a new secretary here in the office and there are no mauals for this telephone that I can find. Can you help me please to either lead me to a website for the user guide for this type of telephone or answer my questions please?

Thank you
Brenda Lieswald
Administrative Assistant
Alva Monument INC