Configuring Advanced Features219Configuring Advanced FeaturesThis chapter provides information for making configuration changes for the following advancedfeatures: Multicast Paging Action URI VLAN Quality of Service Quality of Experience IPv6 SupportMulticast PagingMulticast paging allows Skype for Business phones to send/receive Real-time Transport Protocol(RTP) streams to/from the pre-configured multicast address(es) without involving SIP signaling.Up to 10 listening multicast addresses can be specified on the Skype for Business phone.Sending RTP StreamUsers can send an RTP stream without involving SIP signaling by pressing a Paging soft key. Amulticast address (IP: Port) should be assigned to the multicast paging key, which is defined totransmit RTP stream to a group of designated Skype for Business phones. When the Skype forBusiness phone sends the RTP stream to a pre-configured multicast address, each Skype forBusiness phone preconfigured to listen to the multicast address can receive the RTP stream.When the originator stops sending the RTP stream, the subscribers stop receiving it.ProcedureConfiguration changes can be performed using the configuration files or locally.Configuration File .cfgSpecify a multicast codec for theSkype for Business phone to send theRTP stream.Parameter:multicast.codec