Cisco 7912 g ip phone features
support of extension mobility
three-way calling (conference)
on-hook dialing, pre-dialing, and off-hook dialing
redial
call hold
call monitor (speaker only no microphone)
messages soft key that allows access to voicemail messages
four-speed dials at the cisco unified callmanager
cisco discovery protocol
auto ieee 802.1q (voice virtual lan [vvlan]) config
ieee 802.1q/p vlan tagging and traffic
802.1q vlan-based switching of traffic between the phone and access switch
services code point (dscp) tagging
g.711a, g.711u, and g.729ab adio compression coders and decoders (codecs)
built-in ethernet switc