| Configuring Call Settings | 176Procedure1. Do one of the following:• On your web user interface, go to Setting > Call Features.• On your VCS, go to More > Setting > Call Features.On your VP59, go to Setting > Call Setting.2. Configure and save the following settings:Parameter Description Configuration MethodVideo Call Rate Configure the maximum videocall rate.Default: 2000kb/s.Web user interfaceEndpointAccount PollingAccount polling feature allows the system to use different call types (Cloud platform/H.323 account/SIP account/PSTN account/H.323 IP Call/SIP IP Call) to dial a number when more than one account isregistered. If account polling is disabled, the system can only dials a number by using the call type with thehighest priority. That is, once the dialed number differs from the call type with the highest priority you areusing, you cannot place a call.Example1. System A is registered with a Yealink Cloud account and a SIP account.2. Select the call type automatically. Dial the number.• If account polling is enabled, system A will use its Cloud account (highest priority) to call system Bfirst. If this call fails, system A continues to use its SIP account (the second highest priority) to callsystem B.• If account polling is disabled, system A can only use its Cloud account (highest priority) to call systemB. SIP account can not be used to call out.• Priority of Call Types• Configuring the Account PollingPriority of Call TypesOn the dialing screen, if you select the call type automatically, the system will select a call type according tothe following priority:• If you dial an account, the priority is: Cloud platform>H.323 account>SIP account>PSTN account.• If you dial an IP address, the priority is: H.323 IP Call>SIP IP Call.Configuring the Account PollingProcedure1. On your web user interface, go to Setting > Call Features.