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Stored Voice Message

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Revision as of 05:05, 14 April 2010 by Aksel (talk) (→‎Licensing)

Stored Voice Messages in AlphaCom are prestored messages which can be played back in various functions.

Message identification

Stored Voice Messages are reference by the combination of two numbers :

The AMCD application uses this reference as the starting point when a feature needs playback of a message. The same references are used for Display texts to be looked up from the Message Description File.

Message technologies

There are four ways that a Stored Voice Message can be implemented:

The three latter forms are based on audio files in .wav format stored on the AMC-IP - AlphaCom Processor Board.

ASVP

The ASVP module and the ASVP board support composing a voice message in run time by using sequences of voice files, and also composing parameterized messages. Parameterized messages can be used to pronounce numbers, dates and times from SW control. A Message Group/Individ reference can result in play out of a sequence of .wav files

Easy Messages

Easy audio messages are audio files which are simple to install and modify, bypassing the more complicated ASVP system. An Easy Message is one single wav file for each Message Group+ Message Individ.

Storing a Easy Message can mask a ASVP message. Deleting an Easy Message again can unmask a ASVP message

  • Web loaded messages are uploaded individually via AlphaWeb.
  • Station recorded message are message recorded from a station.

Stored Voice Message Feature is used to record message from station. Recording an Easy message from a station will not delete the corresponding Web loaded message, it will only mask it. From a station you can delete the station recorded message. This will unmask the Webloaded message, if present.

Storage

Web loaded messages are stored with the name convention:

  • svp_ggg_iii.wav

where ggg is the Message Group number and iii is the Message individ number. Example:

  • svp_010_001.wav is group 10, individ 1 (“dial subscriber number”)

For Station recorded messages an ‘a’ is added to the main part of the filename. Example:

  • svp_010_001a.wav

Message search order

When AMCD wants to play a message, it will search for matching group/individ in the following order

  1. Station recorded easy message (AMC file)
  2. Web loaded easy message (AMC file).
  3. Local ASVP module on AMC-IP board
  4. ASVP board, if present

Licensing

Playback of Stored Voice Messages stored on AMC-IP require purchase of license.

Usage of the ASVP board require no license purchase.

The license check is done on the Message Group and Individ number at the time a message is requested for playback. Different message groups are used for different functions, thereby blocking per function is achieved, as well as limit number of different messages for a function.

Licenses does not limit the duration of single messages, or the total duration of all stored messages. Upload of Easy Messages and Station Recording feature are not restricted by license. The ASVP module is also active without any license. The licensing only blocks which messages can be used.

  • No license: Only ASVP help messages are available ( Message Group 10).
  • Basic Messaging license: ASVP help messages, plus
  • Enhanced Messaging license: Unlocks all current messaging features. (Eg. advanced features like Mail Messages and Absence Messages )
    • Max 10 Mbyte used for the custom uploadable audio messages.
  • ReCall license only: This allow only the Recall function. ReCall will also work for AMC IP card revision 0-4.

Only ReCall will be available if a Basic or Enhanced Messaging license is installed on a AMC IP card revision 0-4.

Audio file formats supported

AlphaCom can playback only wav container file format files, with 16kHz samplerate, single channel (mono), and one of the following three encodings

  • PCM files at 16kHz samplerate (linear 16bit), mono (1 channel).
  • MS ADPCM at 16kHz samplerate, mono (1 channel).
  • IMA ADPCM at 16kHz samplerate, mono (1 channel).

PCM files need 32 kbyte /s. The ADPCMs need 8 kbyte /s (Same as G.711/G.722)

Station recorded easy messages are stored as IMA ADPCM.

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