| Configuring Account Settings | 86Configuring the PSTN accountPSTN box CPN10 is used to connect video conferencing system to the PSTN (Public Switched TelephoneNetwork). It is a cost-effective solution for PSTN office. Up to 2 cascaded PSTN Boxes can be connected tovideo conferencing systems, which allow you to experience the conference conveniently in excellent speechquality with PSTN. For more information, refer to Yealink PSTN Box CPN10 Quick Start Guide. After PSTN isconnected, you can take the PSTN as one audio and use the PSTN to join the conference mixing with theaudio and video.Procedure1. Do one of the following:• On your web user interface, go to Account > PSTN Account.• On your VCS, go to More > Setting > Advanced > PSTN Account.On your VP59, go to Setting > Advanced > PSTN Account.• On your CTP20, go to Setting > Advanced > PSTN Account.2. Configure and save the following settings:Parameter Description Configuration MethodAccount Active/PSTN AccountX Enable or disable the PSTNaccount X.Default: On. X=1-2.Web user interfaceEndpointCTP20Label/PSTN Account Label Configure the PSTN accountlabel. Web user interfaceEndpointCTP20Configuring the Video Conference Platform AccountYou can log into the following video conference platform:• Yealink VC Cloud• Yealink Meeting Server• StarLeaf• Zoom• Pexip• BlueJeans• EasyMeet• Videxio (it is not applicable to VP59)• CustomNote:If you purchase the VC200 Custom Edition for Yealink Cloud, your endpoint can register a YealinkCloud account only. Other Cloud platforms are unavailable on your endpoint. What’s more, youcannot register a SIP account or H.323 account, and cannot dial an IP address.• Registering a Yealink Cloud Account• Registering a YMS Account• Registering a StarLeaf Account