VoIP phone SCCP SIP Power Adapter Sold Separately

Additional information



The Cisco Unified IP Phone 7942G is a full-featured IP phone with speakerphone and handset designed for wideband audio. It is intended to meet the needs of transaction-type workers with significant phone traffic. It has two programmable backlit line/feature buttons and four interactive soft keys that guide you through all call features and functions. The phone has a large, 4-bit grayscale graphical LCD that provides features such as date and time, calling party name, calling party number, digits dialed, and presence information. The crisp graphics capability of the display allows for the inclusion of higher value, more visibly rich Extensible Markup Language (XML) applications, and support for localization requiring double-byte Unicode encoding for fonts. A hands-free speakerphone and handset designed for hi-fidelity wideband audio are standard on the Cisco Unified IP Phone 7942G, as is a built-in headset connection and an integrated Ethernet switch.
Phone-Casing CompositionAcrylonitrile butadiene styrene (ABS) plastic in textured dark gray color with silver bezel
PowerSupports IEEE 802.3af PoE (Class 2).

Also supports Cisco Prestandard Power over Ethernet (PoE), allowing powering from any

of the Cisco Inline Power-capable blades and boxes, plus Cisco midspan. 48VDC is required;

it can be supplied locally at the desktop using an optional AC-to-DC power supply (part number

CP-PWR-CUBE-3=) or power injector (CP-PWR-INJ=).

Local power options require a corresponding AC country cord.

Phone Software RequirementsSupported in 8.3(2) and greater
Call Control CompatibilityCall Control Compatibility
Signaling ProtocolsSkinny Client Control Protocol (SCCP) and Session Initiation Protocol (SIP) with Cisco call control
Operating Temperature32 to 104F (0 to 40C)
Relative Humidity10 to 95% (noncondensing)
Storage Temperature14 to 140F (-10 to 60C)
Display5-inch (12.5 cm), high-resolution (320 x 222), graphical monochrome 4-bit grayscale display.
Wideband AudioSupport for wideband (G.722 codec, adherence to TIA 920), including handset, headset, and

speakerphone (see Q&A for details).

Codec SupportG.711a, G.711, G.729a, G.729ab, G.722, and iLBC audio compression codecs are supported.
SpeakerphoneFull-duplex speakerphone with acoustic echo cancellation.
Messages KeyProvides direct access to voicemail.
Quality of Service (QoS) OptionsSupports differentiated services code point (DSCP) and 802.1Q/p standards.
SecurityPositive device identity through X.509v3 Certificates, digitally signed images, cryptographically

secure provisioning, and secure signaling and secure media with AES-128. Cryptography is

not enabled by default and may only be enabled through a cryptographically enabled CUCM.

The phone also contains an 802.1X supplicant and supports the EAPOL pass-through.

Language SupportBuilt-in support for more than 30 languages (dependent on Cisco Unified Communications Manager version).
Configuration OptionsIP address assignment can be statically configured or configured through the DHCP client.




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