Cisco AS5400XM Uživatelský manuál stáhnout pdf (Strana 7)

Features Support Details

and accounting (AAA)

Voice media applications

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Tool Command Language (TCL) scripts support for application customization

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Voice Extensible Markup Language (VoiceXML) script support for application customization

Billing

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Standard call detail records (CDRs) for accurate billing

Lawful Intercept

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Provide replicated packets to third-party mediation device

Session performance

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1000 concurrent calls with 2000 sessions in flow-through mode

Call Admission Control

For VoIP to be a practical replacement for standard PSTN telephony services, customers need to receive the same consistent, high quality

of voice transmission they receive with basic telephone services. For real-time, delay-sensitive traffic such as voice, it is better to deny

network access under congestion conditions than to allow traffic onto the network to be dropped and delayed, causing intermittent

impaired QoS and resulting in customer dissatisfaction.

Numerous QoS mechanisms exist in Cisco IOS Software to allow service providers to design and configure packet networks that provide

the necessary low latency and guaranteed delivery required for voice traffic. These mechanisms include tools such as queuing, policing,

traffic shaping, packet marking, and fragmentation and interleaving.

CAC extends the QoS tool suite to protect voice traffic from being negatively affected by other voice traffic, keeping excess voice traffic

off the network. CAC allows the Cisco AS5400XM Universal Gateway to make deterministic and informed decisions before a voice call

is established based on whether the required network resources are available to provide suitable QoS for the new call. CAC provides:

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Voice call admission decisions based on overall CPU use and call arrival rate at the individual gateway

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The ability to monitor the status of an Ethernet interface and use that information to take a TDM interface out of service

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Voice call admission based on the prevailing conditions in the packet network such as end-to-end latency, jitter, or the ability

to reserve the resources required to handle the call and assure quality

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Reporting information about only the available circuits to H.323 gatekeepers, accounting for the circuits in use for data, voice,

or fax services to achieve higher call success rates

VoiceXML Solution Infrastructure

The Cisco AS5400XM Universal Gateway can interpret VoiceXML documents. VoiceXML is an open-standard markup language used

to create voice-enabled Web browsers and IVR applications. Just as HTML enables users to retrieve data with a PC, VoiceXML enables

subscribers to retrieve data with a telephone. The accessibility of the telephone and its ease of use make VoiceXML applications a

powerful alternative to HTML for accessing the information and services that the Internet provides. The Cisco VoiceXML Solution

Infrastructure takes advantage of Cisco AS5400XM Universal Gateway DSP resources, signaling, and media-conversion capabilities to

execute VoiceXML application logic at the edge of the network, offloading servers and the network to support unified communications

services. Cisco VoiceXML gateways support two standard audio formats for recording and playback: .au (audio/basic) and .wav

(audio/wav). The VoiceXML Store and Forward feature allows streaming-based voice recording and playback features for various media,

including local memory, HTTP, Extended Simple Mail Transfer Protocol (ESMTP), and Real-Time Streaming Protocol (RTSP) for 14

different Cisco codecs and the two standard audio file formats.

The Cisco AS5400XM Universal Gateway running a VoiceXML or TCL application can use Media Resource Control Protocol (MRCP)

to control media resources on external media servers, such as speech synthesizers for text-to-speech (TTS) and speech recognizers for

automatic speech recognition (ASR). MRCP is an application-level protocol developed by Cisco and its ASR and TTS media server

partners, Nuance Communications and SpeechWorks International. The ability of this gateway to interact with ASR and TTS servers

provides the capabilities required to satisfy the most demanding and advanced IVR solutions.

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