Yealink Yealink SIP-T28P, Administrator'S Manual

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Configuring Advanced Features
141
This chapter provides information for making configuration changes for the following
advanced features:

Distinctive Ring Tones

Tones

Remote Phone Book

LDAP

Busy Lamp Field

Automatic Call Distribution

Message Waiting Indicator

Multicast Paging

Call Recording

Hot Desking

Action URL

Action URI

Server Redundancy

LLDP

VLAN

VPN

Quality of Service

Network Address Translation

802.1X Authentication

TR-069 Device Management

IPv6 Support
Distinctive ring tones allows certain incoming calls to trigger IP phones to play distinctive
ring tones. The IP phone inspects the INVITE request for an "Alert-Info" header when
receiving an incoming call. If the INVITE request contains an "Alert-Info" header, the IP
phone strips out the URL and keyword parameter and maps them to the appropriate
ring tone.
Note
If the caller has existed in the local directory, the ring tone assigned to the caller
should be preferentially played.