Yealink SIP-T21 - Manual (Page 17)

Overview
7
Options Phone User Interface Web User Interface
--DND √
--Call Forward √
--Call Transfer √
--Call Waiting √
--Conference
--Call Park √
--Call Pickup √
--Anonymous Call √
--Anonymous Call Rejection √
Advanced Phone Features
√
--BLF √
--Call Recording √
--Hot Desking √
--Intercom √
--Multicast Paging
--Music on Hold
--ACD √
--Messages √
SIP Account
√
--User Options
--Register Status √
--Activation √
--Label √
--Display Name √
--Register Name √
--User Name √
--Password √
--SIP Server1/2 √
--Server Option
--Server Port
--Outbound Status √
--Outbound Proxy √
--NAT Traversal
--STUN Status √
--STUN Server √
Note The table above lists most of the feature options. Please refer to the relevant sections for
more information.