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 Composition||Acrylonitrile butadiene styrene (ABS) plastic in textured dark gray color with silver bezel|
|Power||Supports 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 Requirements||Supported in 8.3(2) and greater|
|Call Control Compatibility||Call Control Compatibility|
|Signaling Protocols||Skinny Client Control Protocol (SCCP) and Session Initiation Protocol (SIP) with Cisco call control|
|Operating Temperature||32 to 104F (0 to 40C)|
|Relative Humidity||10 to 95% (noncondensing)|
|Storage Temperature||14 to 140F (-10 to 60C)|
|Display||5-inch (12.5 cm), high-resolution (320 x 222), graphical monochrome 4-bit grayscale display.|
|Wideband Audio||Support for wideband (G.722 codec, adherence to TIA 920), including handset, headset, and|
speakerphone (see Q&A for details).
|Codec Support||G.711a, G.711, G.729a, G.729ab, G.722, and iLBC audio compression codecs are supported.|
|Speakerphone||Full-duplex speakerphone with acoustic echo cancellation.|
|Messages Key||Provides direct access to voicemail.|
|Quality of Service (QoS) Options||Supports differentiated services code point (DSCP) and 802.1Q/p standards.|
|Security||Positive 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 Support||Built-in support for more than 30 languages (dependent on Cisco Unified Communications Manager version).|
|Configuration Options||IP address assignment can be statically configured or configured through the DHCP client.|