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Updated:March 13, 2015
Q. What is the Cisco
® Unified IP Phone 7975G?
A. The Cisco Unified IP Phone 7975G is part of a new suite of evolutionary Cisco Unified IP Phone 7900 Series endpoints. The Cisco Unified IP Phone 7975 enhances the end-user experience with high-fidelity wideband audio, improved navigation options, and other features.
Q. Is the Cisco Unified IP Phone 7975G replacing existing phones in the portfolio?
A. Yes. The Cisco Unified IP Phone 7975G replaces the Cisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE.
Q. What are the main differences between this phone and the Cisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE? Which phone should I order?
A. Refer to Table 1 for the primary differences.
Table 1. Feature Comparison
Cisco Unified IP Phone 7975G
Cisco Unified IP Phone 7970G
Cisco Unified IP Phone 7971G-GE
Internet low-bit rate codec (iLBC)
Four-way + "Select"
8 (+ Key Expansion Module)
8 (+ Key Expansion Module)
8 (+ Key Expansion Module)
* Cisco does not offer the headset; you must purchase it separately. The wideband handset on Cisco Unified IP Phone 7971G-GE and 7970G models is available as an accessory only; it is not shipped by default with the phone.
Q. What phone firmware version is required?
A. A new phone firmware version is required for the Cisco Unified IP Phone 7975G. Skinny Client Control Protocol (SCCP) or Session Initiation Protocol (SIP) firmware Version 8.3(2) is required at minimum. Cisco recommends use of the latest posted version of firmware to take advantage of ongoing product enhancements.
Q. Is this truly new firmware, or is the existing base code (for Cisco Unified IP Phone 7970G, etc.) used?
A. The new firmware uses the base code for the existing Java-based phones. The application software is common across the models, and in general all features supported on the earlier phones will continue to be supported on the Cisco Unified IP Phone 7975G.
Q. What protocols are supported?
A. Both SCCP and SIP (with Cisco call control) are supported.
Q. How many languages are supported?
A. Language support is tied to call control. With Cisco Unified Communications Manager 7.0, the phones support 48 locales and 37 languages. The latest additions are Arabic Estonian, Latvian and Lithuanian.
Q. Is there an upgrade program to move from an existing phone to one of the newer phones?
A. The regular Cisco Technology Migration Program (TMP) is available. Use the Cisco TMP tool to verify the discount.
Features and Functions
Q. What new features are supported?
A. Refer to Table 1 for feature comparison. Following are some of the new features of the Cisco Unified IP Phone 7975G:
• Large 5.6-inch graphical TFT backlit color display for improved visibility, ease of use, and easy access to productivity-enhancing applications
• TIA 920-compliant wideband speakerphone and handset, plus support of wideband headsets with G.722 wideband codec; phone body cavities, speakers, and handsets are specifically designed for wideband audio
• Four-way navigation button with center Select key for intuitive screen navigation and entry
• iLBC robust narrowband codec support for use in high-packet-loss network environments
Wideband and Codecs
Q. What is wideband and what are the advantages?
A. Wideband audio expands the available spectrum for voice communications from the standard public-switched-telephone-network (PSTN) range of approximately 300-3300 Hz to approximately 150-7000 Hz. The increased spectrum and frequency response leads to greater voice clarity, intelligibility, "richness," and less listener fatigue.
Q. What is TIA 920?
A. TIA (Telecommunications Industry Association) 920 is a voice-over-IP (VoIP) standard for wideband response.
Q. What is the G.722 sampling rate?
A. It is 16 kHz.
Q. What is the bandwidth requirement for G.722?
A. The requirement is 64 kbps - the same requirement as for the G.711 codec.
Q. Can I use existing narrowband handsets on the new phones?
A. Wideband handsets are the only handsets supported on the new phone models; they are shipped with each new phone model.
Q. Will G.711 and G.729 narrowband codecs sound "normal" on the new Cisco Unified IP Phones that have seemingly been designed for wideband?
A. Using the wideband handset with narrowband codecs may result in perceived improvements in voice quality compared to when a regular narrowband handset is used.
Q. Can I use either wideband or narrowband headsets?
A. Yes, you can use either type. For the best possible audio performance, the Wideband Headset setting (Enabled or Disabled) of the phone should correlate with the type of headset used.
Q. How can I tell if G.722 is enabled on my phone?
A. The user interface displays the configuration. View the Settings -> Device Configuration
-> Media Configuration menu. For more details refer to the administrative guides for the phone.
Q. How can I take advantage of G.722 and the wideband experience?
A. For point-to-point (IP phone-to-IP phone) wideband calls over a LAN at a single customer site, both endpoint devices must be enabled to support wideband within Cisco Unified CallManager Version 4.1 or later. For multisite point-to-point wideband calls, the IP gateway must support the G.722 wideband codec.
Q. Is wideband/G.722 supported by Cisco voice gateways?
A. Yes, G.722 is supported with Cisco IOS
® Software Release 12.4(20)T and later.
Q. Does Cisco voice conferencing support wideband/G.722?
A. Voice conferencing is a top application for wideband, because speaker recognition and voice naturalness are enhanced over narrowband. Cisco Unified MeetingPlace
® Release 8.0 supports wideband conferencing (using G.722).
Q. Does Cisco Unified Communications Manager Express support wideband/G.722?
A. Yes. G.722 is supported with Cisco IOS Software Release 12.4(20)T and later.
Q. Does Cisco Unified Personal Communicator support wideband/G.722?
A. Cisco has no plans to support wideband/G.722 on the Cisco Unified Personal Communicator. However, Cisco IP Communicator Version 7.0 will support G.722 at FCS.
Q. Will XML applications be able to take advantage of the G.722 codec for audio playout?
A. Yes. Enhancements to XML application programming interfaces (APIs) in the Version 8.3(2) phone firmware allow for specification of extended stream attributes such as codec type. This support will be reflected in updates to the Software Development Kit (SDK).
Q. What is Internet low-bit rate codec (iLBC)?
A. iLBC is a low-bit rate, narrowband codec that withstands high packet loss. It delivers speech quality better than G.729 and G.723.1 and is resilient against packet loss compared to other low-bit rate codecs. It operates at 13.3 kbps (30-ms frames) and 15.2 kbps (20-ms frames), and delivers substantially better voice quality than other low-bit rate narrowband codecs over congested networks with packet loss.
Q. Does Cisco voice conferencing support the iLBC robust codec for packet-loss environments?
A. Cisco Unified MeetingPlace Release 8.0 supports iLBC.
Q. Do Cisco voice gateways support iLBC?
A. Yes, iLBC is supported in Cisco IOS Software Release 12.4(15)T and later.
Q. Does Cisco Unified Communications Manager Express support iLBC ?
A. Yes, iLBC is supported in Cisco IOS Software Release 12.4(20)T and later.
Q. What are the Cisco Unified Communication Manager and phone firmware requirements for use of the iLBC codec?
A. iLBC requires Cisco Unified Communications Manager 6.0(1) at a minimum, with phone firmware Version 8.3(2).
Q. What are the size and resolution of the display?
A. The Cisco Unified IP Phone 7975G features a 5.6-inch touchscreen graphical backlit TFT color display with 16-bit color depth and 320 x 240 effective pixel resolution. The display also supports localization requiring double-byte Unicode encoding for fonts.
Q. Does the Cisco Unified IP Phone 7975G support XML services?
A. Yes. With an advanced user-interaction model and a backlit TFT color display, the Cisco Unified IP Phone 7975G can deliver powerful applications and network data to the desktop. This capability allows for the availability of more sophisticated applications at any desktop or other location where the phone is deployed.
Q. This phone has no "Viewing Angle" display adjustment. Is there a reason?
A. Viewing Angle is not applicable to the new Cisco Unified IP Phone 7975G because it uses a digital LCD.
Q. Are the Cisco Unified IP Phone Expansion Module 7914, Cisco Unified IP Phone Expansion Module 7915 and Cisco Unified IP Phone Expansion Module 7916 supported?
A. The Cisco Unified IP Phone Expansion Module 7914, Cisco Unified IP Phone Expansion Module 7915 and Cisco Unified IP Phone Expansion Module 7916 are supported on the Cisco Unified IP Phone 7975G. Up to two expansion modules may be attached.
Q. Does the Cisco Unified IP Phone Expansion Module 7914, Cisco Unified IP Phone Expansion Module 7915 and Cisco Unified IP Phone Expansion Module 7916 require separate power?
A. A single Cisco Unified IP Phone Expansion Module 7914, Cisco Unified IP Phone Expansion Module 7915 and Cisco Unified IP Phone Expansion Module 7916 works without separate power when the phone is locally powered using a Cisco IP phone external power supply. If two expansion modules are attached when the phone itself is locally powered, a second external power supply must be connected to the AC adapter port on the expansion module closest to the phone. When the phone is powered with inline power (IEEE 802.3af) or midspan power (with a power injector), a power supply must be used when either one or two expansion modules are attached.
Q. How do I use the four-way navigation key with the center Select button?
A. The four-way navigation rocker key allows you to scroll vertically and horizontally. In addition, the center of the rocker key contains a smaller button that you can use for selection. The behavior of the outer rocker is the same as that of other phones with a four-way navigation pad (such as the Cisco Unified IP Phone 7971G-GE). Up and Down are used for scrolling vertically through lists and menus. Right and Left are used for scrolling horizontally in multicolumn displays. The Select button acts on actionable items that have focus on the display. For example, if a menu item is in focus, the Select button opens the underlying menu; for a ringer item, the Select button performs the "Play" action. Note: The Select button does not take action on all menu items.
Q. Does the Cisco Unified IP Phone 7975G support Cisco Inline Power?
A. No. The phone supports only IEEE 802.3af Power over Ethernet (PoE) (Class 3).
Q. As a Class 3 IEEE device, does the phone require a continuous draw of 15.4 watts (standard Class 3 allocation)?
A. No. When Cisco Unified IP Phones are connected to common switches such as the Cisco Catalyst
® 3560 Series Switches or Cisco Catalyst Series 3570 Switches, the switch can automatically detect the phone type and provide the exact amount of power that the phone needs. The use of Cisco Discovery Protocol provides this greater granularity to the power classification, allowing more accurate reporting of power consumption, and a higher density of phones on the same switch. The Cisco Unified IP Phone 7975G draws a maximum of 12W from a switch, placing it beyond the limits of Class 2 but below the default 15.4W value of Class 3.
Q. Is there a recommended powering option for these phones?
A. No. Powering decisions depend on your environment. You can use the IEEE 802.3af inline power method; alternatively, you can use either the standard Cisco Unified IP Phone external power adapter or the Cisco Unified IP Phone Power Injector for local power.
Q. Can I "turn off" the phone display when not in use to conserve power?
A. Yes. As with the previously available Cisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE, you can set the display (with the Cisco Unified Communications Manager and Unified Communications Manager Express administrator tool) to turn off at designated times. For example, you may choose to turn off the display after business hours on weekdays and all day on Saturdays and Sundays. This action can both conserve power and add to the longevity of the LCD. Note: When the display is off (screen dark), the Display softkey is illuminated to indicate power-save mode.
Product Compatibility: General
Q. What Cisco Unified Communications Manager release is required for the Cisco Unified IP Phone 7975G?
A. The Cisco Unified IP Phone 7975G requires one of the following releases at a minimum: Cisco Unified CallManager 4.1(3)sr5b or 4.2(3)sr2b, or Cisco Unified Communications Manager 4.3(1), 5.1(1)b, 5.1(2), or 6.0(1).
Q. What Cisco Unified Communications Manager Express release is required?
A. The Cisco Unified IP Phone 7975G is first supported by Cisco Unified Communications Manager Express Version 4.1 and Cisco IOS Software Release 12.4(15)T (available now).
Q. Is Survivable Remote Site Telephony (SRST) supported? What about Secure SRST?
A. Yes, Cisco Unified Communications Manager Express 4.1 supports both.
Q. Does the Cisco Smart Business Communications System (Cisco Unified Communications 500 Series for Small Business) support the new phone?
A. Yes, the Cisco Smart Business Communications System supports the Cisco Unified IP Phone 7975G.
Q. Does Cisco Unified Video Advantage for desktop video conferencing support the new phone?
A. Yes, Cisco Unified Video Advantage supports the Cisco Unified IP Phone 7975G.
Q. Which headsets are compatible and recommended?
A. Cisco recommends a wideband headset that can take advantage of the improved voice quality available when used in conjunction with the G.722 codec. Because the Cisco Unified IP Phone 7975G features wideband audio, you should use "noise canceling" (directional) headsets for best performance. Please check with headset vendors for Cisco product compatibility. You should always try headsets in the setting of intended use prior to mass purchase and deployment.
Availability and Ordering
Q. When can I order this new phone?
A. The Cisco Unified IP Phone 7975G is now orderable.
Q. Are station user licenses or device license units required?
A. Yes. As with all Cisco phones, you must purchase a station user license with each phone ordered for use with Cisco Unified CallManager 4.0 and earlier, or for Cisco Unified Communications Manager Express. For Cisco Unified Communications Manager 5.0 and later releases, you must purchase the appropriate device license units.
Q. How many device units (in Cisco Unified Communications Manager 5.0 and later) do I need?
A. You need five device units - the same number required for the existing Cisco Unified IP Phone 7970 models. In Cisco Unified CallManager 4.0 releases, a phone-specific user license must be configured when ordering the phone.
Q. What items are included with a shipped phone?
A. As with the other Cisco Unified IP Phones, this new phone ships with the base unit (with attached foot stand), a handset, a handset cord, a Category 5e Ethernet cord and patch cable, a pictorial quick-start guide, Regulatory Compliance and Safety Information (RSCI), a Cisco 1-year limited hardware warranty card, and an end-user software license agreement.
For More Information
Q. Where can I learn more about the new Cisco Unified IP Phone 7975G?