Model 53i IP Phone User Guide 133Available Features Enabled by AdministratorsCustomizable Callers List KeyYour System Administrator can specify an XML URI that creates a custom CallersList application for your phone. When you press the Callers List key, the phoneaccesses a custom XML URI Callers List instead of the standard Callers List. Contactyour System Administrator for more information.Autodial (Hotline and Warmline)Your System Administrator can configure an autodial feature on your phone. Ifautodial is enabled, the phone automatically dials a preconfigured number wheneverit is off-hook. Depending on the configuration specified by your Administrator, theAutodial functions as either a “hotline”, or as a “warmline,” as follows:• Hotline: The IP phone immediately dials a preconfigured number when youlift the handset.• Warmline: The IP phone waits for a specified amount of time after you lift thehandset before dialing a preconfigured number. If you do not dial a numberwithin the time allotted, then the IP phone begins to dial the number.The Autodial feature is available on a global or per-line basis. Contact your SystemAdministrator for more information.Centralized ConferencingThe 53i supports centralized conferencing for Sylantro and Broadsoft servers. Thisfeature provides centralized conferencing on the SIP server (versus localized, on thephone). Your System Administrator must enable this feature on your phone beforeyou can use centralized conferencing.Centralized Conferencing allows you to perform the following:• Conference two active calls together into a conference call.• When on an active conference call, invite another party into the call.• Create simultaneous conference calls on the same IP phone (Sylantro serversonly). For example, a user at extension 2005 could create two conferences,and put one conference on hold while conversing with the other party:- Line 1: conference together extensions 2005, 2010, and 2020.- Line 2: conference together extensions 2005, 2011 and 2021.• Disconnect from an active conference call while allowing the other callers toremain connected.• Add unlimited number of users to a conference (dependent on the limitationsof the server).• Join two active calls together into a conference.• Join incoming or outgoing active calls to any existing conference.ReferenceFor more information about using Centralized Conferencing, see "CentralizedConferencing (for Sylantro and Broadsoft Servers)" on page 90.Notes:1. Any speeddial numbers that you configure on your IP phone are notaffected by autodial settings.2. If Autodial is configured on your phone, any lines that function as hotlinesdo not accept conference calls, transferred calls, and/or intercom calls.