User Guide for the CP920 HD IP Conference Phone12 Ethernet Cable (7.5m CAT5E UTP cable) Power Adapter Quick Start GuideCheck the list before installation. If you find anything missing, contact your systemadministrator.Optional AccessoriesThe following items are optional accessories for your CP920 IP conference phone. You need topurchase them separately if required. Expansion PSTN Box CPN10PSTN Box CPN10 3m PSTN Cable Double-side Tape Quick Start GuideNotePhone InstallationIf your phone is already installed, proceed to Phone Initialization on page 15.We recommend that you use the accessories provided or approved by Yealink. The use ofunapproved third-party accessories may result in reduced performance.