Table Of Contents

Cisco IOS Voice Port Feature Roadmap

Platforms and Cisco IOS Software Images

Cisco IOS Voice Port Feature List

Cisco IOS Voice Port Feature Roadmap

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This roadmap provides information about Cisco IOS voice features involving voice port configuration. It contains the following:

•Platforms and Cisco IOS Software Images

•Cisco IOS Voice Port Feature List

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Note This chapter describes how to access Cisco Feature Navigator. It also lists and describes, by Cisco IOS release, voice port features for that release.

For information about the full set of Cisco IOS voice features, see the entire Cisco IOS Voice Configuration Library—including library preface, glossary, and other documents—at http://www.cisco.com/en/US/docs/ios/12_3/vvf_c/cisco_ios_voice_configuration_library_glossary/vcl.html.

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Platforms and Cisco IOS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Cisco IOS Voice Port Feature List

Table 1 lists voice port features by Cisco IOS release. Features that are introduced in a particular release are available in that and subsequent releases.

Table 1 Voice Port Features by Cisco IOS Release 

Release	Feature Name	Feature Description	Where Documented
12.4(20)T	Software-Configurable 128-ms Echo Cancellation	Beginning in Release 12.4(20)T, software-configurable echo cancellation coverage was expanded to include 80, 96, 112, and 128 milliseconds. The default is changed from 64 ms to 128 ms.	Configuring Echo Cancellation and Configuring Hardware Echo Cancellation on T1/E1 Multiflex Voice/WAN Interface Cards and NextPort-Based Voice Tuning and Echo Cancellation
12.4(15)XZ	Enhancements to the Cisco 880 Series Routers	Beginning in Release 12.4(15)XZ, the Cisco 880 broadband series routers integrate access technologies such as the VDSL2, 3G; adds voice for service provider-managed services and for enterprise teleworkers. In addition, the broadband series routers offer UTM features such as URL filtering and optional IEEE 802.11n integrated access points that can be managed using LWAPP.	Configuring Analog Voice Ports and Configuring Digital Voice Ports
12.3(14)T	Hardware Echo Cancellation	Two echo cancellation modules (EC-MFT-32 and EC-MFT-64) provide hardware echo cancellation with a hard-coded tail length of 128 milliseconds for VWIC2s.	Configuring Hardware Echo Cancellation on T1/E1 Multiflex Voice/WAN Interface Cards
12.3(11)T	NextPort-Based Voice-Tuning and Dual-Filter G.168 Echo Canceller	NextPort dual-filter G.168 echo canceller (EC) improves voice quality in VoIP connections by providing relatively less residual echo leakage, better nonlinear processing (NLP) timing, less clipping, and better comfort noise generation (CNG) in most environments.	NextPort-Based Voice Tuning and Echo Cancellation
12.3(7)T	IP Communications High-Density Digital Voice/Fax Network Module	This feature supports high-density digital voice and low-density analog voice connectivity along with data and integrated access connectivity. The network modules offer built-in T1/E1 ports, and include a single VIC/voice WAN interface card (VWIC) slot for FXS, FXO, E&M, software-configured CAMA, DID, BRI, or E1 and T1 cards, up to a maximum of four T1/E1 ports. The network modules also support up to 32 HDLC channels with an aggregate capacity of 2.048 Mbps.	Configuring Digital Voice Ports
12.2(13)T	Enhanced ITU-T G.168 Echo Cancellation	This feature offers improved standards for echo cancellation performance. Configurable tail length is increased, up to 64 ms. Minimum ERL is configurable to greater than or equal to 0 dB, 3 dB, or 6 dB. Echo suppression is no longer needed because of faster convergence.	Configuring Echo Cancellation

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