Datasheet

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Features
Specifications
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Call forward notification
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Call filter
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Call history lists
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Call park
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Call pickup
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Call timer
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Call waiting
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Call chaperone
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Caller ID
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Corporate directory
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Conference, including traditional Join feature
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Cross Cluster Extension Mobility (EMCC)
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Direct transfer
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Extension mobility
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Fast-dial service
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Forced access codes and client matter codes
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Group call pickup
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Hold
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Intercom
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Immediate divert
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Malicious-caller ID
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Message-waiting indicator (MWI)
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Meet-me conference
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Mobility
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Music on hold (MoH)
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Mute
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Network profiles (automatic)
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On- and off-network distinctive ringing
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Personal directory
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PickUp
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Predialing before sending
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Privacy
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Private Line Automated Ringdown (PLAR)
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Redial
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Ring tone per line appearance
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Service Uniform Resource Locator (URL)
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Shared line
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Silent monitoring and recording
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Speed dial
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Time and date display
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Transfer
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Uniform Resource Identifier (URI) dialing
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Visual voice mail
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Voice mail
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Whisper coaching
Electronic hookswitch
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You can control the hookswitch electronically with a third-party headset connected to either the USB port or
auxiliary port, or directly paired with the phone through bluetooth.
Cisco Intelligent Proximity
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Audio path moving sends audio through the IP Phone 8851 for a mobile device-connected call.
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Call history synchronization allows you to view placed and missed calls of your mobile device from the
IP Phone 8851.
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Contact synchronization allows you to synchronize the contact objects from your mobile device to your
IP Phone 8851.
Quality-of-service (QoS)
options
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The phone supports Cisco Discovery Protocol and 802.1Q/p standards, and can be configured with an 801.1Q
VLAN header containing the VLAN ID overrides configured by the Admin VLAN ID.