Patent ID: 8730949

Claim:
A private branch exchange comprising: a public telephone network connection portion communicatively connected to a public telephone network; a terminal connection portion communicatively connected to a first telephone terminal unit; a park portion configured to park a call put through to said first telephone terminal unit via said terminal connection portion; a control portion controlling said park portion, when a nuisance call from said public telephone network is put through to said first telephone terminal unit via said terminal connection portion, to park said nuisance call on the basis of a prescribed operation of a user against said nuisance call, and parking a call put through to the first telephone terminal unit and thereafter canceling the parking through a second telephone terminal unit, different from the first telephone terminal unit, the control portion allowing the user to talk over the second telephone terminal unit, wherein said park portion is configured to park a prescribed number of calls, and said control portion is configured, when parking a newly received nuisance call in said park portion in a state where said park portion parks said prescribed number of calls, to disconnect any one of said prescribed number of calls parked in said park portion and to thereafter control said park portion to park said newly received nuisance call.