H3C Technologies H3C MSR 50 - Manual (Page 789)

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Configuring IVR
Overview
Interactive voice response (IVR) is used in voice communications. You can use the IVR system to customize
interactive operations and humanize other services. If a subscriber dials an IVR access number, the IVR
system plays the prerecorded voice telling the subscriber what to do. For example, it might tell the
subscriber to dial a number.
Advantages
A conventional interactive voice system uses fixed audio files and operations. IVR enables you to
customize your own interactive system by adding, modifying, and removing audio files. IVR has the
following advantages.
Customizable voice prompts
Voice prompts can be saved as audio files, which must be .wav files. You can record personalized voice
prompts and upload the audio files to the voice devices. The customizable voice prompts can be played
to subscribers. The adding, modifying and removing operations in the IVR system are simple and easy to
use, and the configurations take effect instantly.
Various codecs
The IVR system supports four codecs for voice prompts: G.711alaw, G.711ulaw, G.723r5, and G.729r8.
Each kind of codec has its advantages and disadvantages: G.711alaw and G.711ulaw provide high
quality of voice, while requiring greater memory space; G.723r53 and G.729r8 provide relatively low
quality of voice, while requiring less memory space.
Flexible node configuration
To simplify configuration, the IVR system uses nodes as basic units for configuration. You can define three
types of nodes: call node, jump node, and service node. Each node type has a single function, and you
can combine them to realize complex functions.
• Call node—Executes a secondary call.
• Jump node—Jumps to another node according to the input of the subscriber.
• Service node—Executes various operations, such as executing an immediate secondary call, auto
jumping, terminating a call, and playing an audio file.