Call Features139DescriptionIt configures the block out numbers.Example:dialplan.block_out.number.1 = 4321When you dial the number “4321” on your phone, the dialing will fail and the phone screen will prompt"Forbidden Number".PermittedValues String within 32 charactersDefault BlankWeb UI Settings->Dial Plan->Block Out->BlockOut NumberX[1]Parameter dialplan.block_out.line_id.X[1] .cfgDescriptionIt configures the desired line to apply the block out rule. The digit 0 stands for all lines. If it is left blank,the block out rule will apply to all lines on the IP phone.Note: Multiple line IDs are separated by commas.PermittedValues 0 to 8Default BlankWeb UI Settings->Dial Plan->Block Out->Account[1]X is from 1 to 10.Example: Adding Replace Rules Using a Replace Rule FileThe following example shows the configuration for adding replace rules.Customize the replace rule template file and place this file to the provisioning server “http://192.168.10.25”.Exampledialplan_replace_rule.url = http://192.168.10.25/DialPlan.xmlAfter provisioning, the rules defined in this file are added to the IP phone, and you can use the replace rules on thephone.Emergency DialplanYou can dial the emergency telephone number (emergency services number) at any time when the IP phone ispowered on and has been connected to the network. It is available even if your phone keypad is locked or no SIPaccount is registered.Yealink IP phones support emergency dialplan.Emergency Dial PlanYou can configure the emergency dial plan for the phone (for example, emergency number, emergency routing). Thephone determines if this is an emergency number by checking the emergency dial plan. When placing an emergencycall, the call is directed to the configured emergency server. Multiple emergency servers may need to be configured for