Advanced Phone Features1396. Click Confirm to accept the change.NoteMusic on hold (MoH) is the business practice of playing recorded music to fill the silencethat would be heard by the party placed on hold. To use this feature, you should specifya SIP URI pointing to a Music on Hold Server account. When a call is placed on hold, thephone will send a SIP INVITE message to the Music on Hold Server account. The Musicon Hold Server account automatically answers to the SIP INVITE messages andimmediately plays audio from some source located anywhere (LAN, Internet) to theheld party. Contact your system administrator for the SIP URI.To configure music on hold server via web user interface:1. Click on Account.2. Select the desired account from the pull-down list of Account.3. Click on Advanced.4. Enter the SIP URI (e.g., sip:moh@sip.com) in the Music Server URI field.5. Click Confirm to accept the change.The priorities of listening addresses are predefined: 1 with the highest priority, 10 with thelowest.Both the multicast paging sender and the receiver play a warning tone whenestablishing a multicast paging call.Multicast listening addresses are configurable via web user interface only.