IP PHONE SYSTEM, SERVER APPARATUS, IP PHONE, AND PARK HOLD METHOD

PROBLEM TO BE SOLVED: To provide an IP phone system compatible with the SIP protocol wherein park hold is realized, and in particular, park hold display of an IP phone for taking part in a group on the way is quickly brought into a normal state. SOLUTION: The IP phone system is configured with: a server apparatus 2 provided with a park hold control means 8 for controlling park hold or park hold release on the basis of park hold list information JL for registering speech calls subjected to park hold or park hold list information JL from which speech calls subjected to park hold release are deleted; and a plurality of the IP phones 3a to 3d forming a group and provided with park hold display control means 9a to 9d for controlling display of park hold or park hold release on the basis of the park hold list information JL supplied from the server apparatus 2. COPYRIGHT: (C)2006,JPO&NCIPI