Cisco | 7942G - Unified IP Phone VoIP | Cisco Unified IP Phone 7942G

Cisco Unified IP Phone 7942G
Data Sheet
Cisco Unified IP Phone 7942G
Product Overview
Cisco Unified Communications Solutions unify voice, video, data, and mobile applications on fixed and mobile
networks, delivering a media-rich collaboration experience across business, government agency, and institutional
workspaces. These applications use the network as the platform to enhance comparative advantage by accelerating
decision time and reducing transaction time. The security, resilience, and scalability of the network enable users in
any workspace to easily connect anywhere, anytime, and anyplace, using any media, device or operating system.
Cisco Unified Communications is part of a comprehensive solution that includes network infrastructure, security,
wireless, management applications, lifecycle services, flexible deployment and outsourced management options,
and third-party applications.
The Cisco Unified IP Phone 7942G (Figure 1) is a full-featured IP phone with speakerphone and handset designed
for wideband audio. It is intended to meet the needs of 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 (Figure 2) that provides features
such as date and time, calling party name, calling party number, digits dialed, and presence information. The crisp
graphic 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.
Figure 1.
Cisco Unified IP Phone 7942G
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Data Sheet
Figure 2.
Close-Up of Display and Lighted Line Keys
Features and Benefits
The Cisco Unified IP Phone 7942G is designed to grow with your organization and enhancements to your system
capabilities. The dynamic feature set allows the phone to keep pace with your requirements through regular software
updates. Firmware changes can be downloaded from No hands-on moves and changes are required
with the phone—you can simply pick up the phone and move to a new location anywhere on your network. The
Cisco Unified IP Phone 7942G also provides many accessibility features. Table 1 lists the phone’s features.
Table 1.
Cisco Unified IP Phone 7942G Features
5-inch (12.5 cm), high-resolution (320 x 222), graphical monochrome 4-bit grayscale display. Allows for
greater flexibility of features and applications, and significantly expands the information viewed when using
features such as Services, Information, Messages, and Directory. Display also supports localization requiring
double-byte Unicode encoding for fonts.
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.711µ, G.729a, G.729ab, G.722, and iLBC audio compression codecs are supported (see Q&A for
Full-duplex speakerphone with acoustic echo cancellation.
Messages Key
Provides direct access to voicemail.
Directories Key
Ready access to missed, received, and placed calls (plus intercom history and directories). Incoming
messages are identified and categorized on the display, allowing users to quickly and effectively return calls
using direct dial-back capability. Corporate directory integrates with the Lightweight Directory Access Protocol
Version 3 (LDAP3) standard directory.
Settings Key
Allows user to adjust display contrast, select background images (if available), and select ringer sounds
through the User Preference menu. Network Configuration preferences also can be set up (usually by the
system administrator). Configuration can be set up either automatically or manually for Dynamic Host Control
Protocol (DHCP), Trivial File Transfer Protocol (TFTP), Cisco Unified Communications Manager, and backup
Cisco Unified Communications Manager instances. Other available Settings submenus include Device
Configuration, Security Configuration, and Model Information.
Services Key
Allows users to quickly access diverse information such as weather, stocks, quote of the day, or any Webbased information using XML.
Help Button
Online Help gives users information about the phone keys, buttons, and features.
Speakerphone, Mute, and Headset
Speakerphone includes Speaker On/Off, Microphone Mute, and Headset buttons that are lit when active. For
added security, the audible dual tone multifrequency (DTMF) tones are masked when the speakerphone
mode is used.
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Data Sheet
Ethernet Switch
Internal 2-port Cisco Ethernet switch allows for a direct connection to a 10/100BASE-T Ethernet network
through an RJ-45 interface with single LAN connectivity for both the phone and a colocated PC. System
administrator can designate separate VLANs (802.1Q) for the PC and phone, providing improved security
and reliability of voice and data traffic.
Headset Port
Dedicated headset port eliminates the need for a separate headset amplifier and allows the handset to
remain in its cradle, making headset use simpler. Both wideband (G.722) and narrowband headsets are
Volume Control
Provides easy decibel-level adjustments for the speakerphone, handset, headset, and ringer. The handset is
hearing aid-compatible. Additional volume control gain can be achieved using an inline handset amplifier.
Adjustable Foot-Stand
Stand is adjustable from flat to 60 degrees to provide optimum display viewing and comfortable use of all
buttons and keys. The foot-stand is keyed to match standard wall-jack configurations for wall mounting.
Optional wall-mount brackets are also offered.
Multiple Ring Tones
More than 24 defined user-selectable ring tones are available. Ring tones may also be personalized through
use of the Cisco Unified Phone Application Suite.
Americans with Disabilities Act
(ADA) Features
Handset is hearing aid-compatible and meets Federal Communications Commission (FCC) loudness
requirements for the Americans with Disabilities Act (ADA). Section 508 loudness requirements can be
achieved using industry-standard inline handset amplifiers such as Walker Equipment W-10 or CE-100
amplifiers. Dial pad is also ADA-compliant.
Quality of Service (QoS) Options
Supports differentiated services code point (DSCP) and 802.1Q/p standards.
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 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.
Table 2.
Cisco Unified IP Phone 7942G Product Specifications
Dimensions (H x W x D)
8.2 x 10.5 x 6 in. (20.32 x 26.67 x 15.24 cm)
3.5 lb (1.6 kg)
Phone-Casing Composition
Acrylonitrile butadiene styrene (ABS) plastic in textured dark gray color with silver bezel
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 CPPWR-CUBE-3=) or power injector (CP-PWR-INJ=). Local power options require a corresponding AC country
cord (see Table 6).
Phone Software Requirements
Supported in 8.3(2) and greater
Call Control Compatibility
Supported in Cisco Unified Communications Manager Versions 4.1(3)sr5b, 4.2(3)sr2b, 4.3(1), 5.1.1(b),
5.1(2), 6.0(1) and greater
Signaling Protocols
Skinny Client Control Protocol (SCCP) and Session Initiation Protocol (SIP) with Cisco call control
Supported in Cisco Unified Communications Express and SRST Version 4.1
Table 3.
Temperature Ratings
Temperature Variable
Operating Temperature
32 to 104°F (0 to 40°C)
Relative Humidity
10 to 95% (noncondensing)
Storage Temperature
14 to 140°F (–10 to 60°C)
Certifications—Compliance and Safety
Refer to the following link:
Ordering Information
To place an order, visit the Cisco Ordering Home Page. To download software, visit the Cisco Software Center.
© 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 3 of 5
Data Sheet
Table 4.
Ordering Information—Phone/license
Part Number
Cisco Unified IP Phone 7942G
Cisco Unified IP Phone 7942G, spare
Cisco Unified IP Phone 7942G, for Channels, with one station user license
Cisco Unified IP Phone 7942G, for Channels, with one Cisco Unified Communications Manager Express
station user license
All Cisco Unified IP phones require the purchase of a phone technology license, regardless of call protocol
being used.
Table 5.
Ordering Information—Accessories
Part Number
Locking wall-mounting kit, flat (recommended version)
Nonlocking wall-mounting kit, slanted
Locking wall-mounting kit, slanted
Local power adapter for sites where PoE is not available; refer to Table 6 to select the correct regional power
cord. CP-PWR-CUBE-3= is compatible with and can replace CP-PWR-CUBE-2=.
Single-port midspan power injector with integrated power supply, specifically designed and tested for use with
all Cisco Unified IP Phones. May be used as an alternative to the existing Cisco phone local power adapter
(CP-PWR-CUBE-3=) and can support a maximum distance of 100 meters between an unpowered switch and
a Cisco Unified IP Phone.
Table 6.
Ordering Information—AC Country Power Cords
Part Number
Asia Pacific
European Community
North America
United Kingdom
Cisco Unified Communications Services
Cisco and our certified partners can help you deploy a secure, resilient Cisco Unified Communications solution,
meeting aggressive deployment schedules and accelerating business advantage. Our portfolio of services is based
on proven methodologies for unifying voice, video, data, and mobile applications on fixed and mobile networks.
Our unique lifecycle approach to services defines the requisite activities at each phase of the solution lifecycle.
Customized planning and design services focus on creating a solution that meets your business needs. Awardwinning technical support increases operational efficiency. Remote management services simplify day-to-day
operations, and optimization services enhance solution performance as your business needs change.
For More Information
For more information about the Cisco Unified IP Phone 7942G, visit or contact your local account representative.
© 2007-2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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Data Sheet
Printed in USA
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