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Voicemail to Email wav file size reductiion

Discussion in '3CX Phone System - General' started by VDiesel, Oct 12, 2010.

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  1. VDiesel

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    Dear 3CX team,

    Currently 3CX's voicemail to email encodes to an 8k 16bit PCM (128kbps) uncompressed wav file.
    A simple 1 minute voicemail results in a 1MB wav file attachment. For an enterprise PBX, this is extremely inefficient and problematic for several reasons.

    1. Corporate users receive their email on mobile/cellular devices, and in this case containing these voicemail attachments. Mobile data can be very costly and especially for employees and executives that are traveling outside their normal GSM data zones.

    2. Downloading an uncompressed voicemail PCM wav file takes a considerable amount of time using this format, particularly on a mobile device.

    3. Corporate users often archive their voicemails within their Outlook exchange folders for compliance purposes. With large wav file sizes such as currently used by 3CX, these emails will consume a considerable amount of storage space within a users exchange store causing storage quotas to be unnecessarily exceeded. As an example, a user can store 10 voicemail emails encoded in gsm 6.10 wav format for every 1 voicemail encoded as uncompressed PCM wav format !

    Please change this to allow wav file to be encoded using 8k GSM 6.10 wav compression which will result in a wav file that is 1/10 the size of the current PCM with no audible difference.

    The difference in file size for a 1 minute voicemail is quite significant;
    http://www.nch.com.au/acm/index.html
    8k GSM 6.10 (13kbps) wav file = 102KB http://www.nch.com.au/acm/8kgsm.wav
    8k 16bit PCM (128kbps)wav file = 937KB http://www.nch.com.au/acm/8k16bitpcm.wav

    While I could upload and attached a sample of an 8k GSM 6.10 (22KB) wav in this encoding for your reference, ironically the message board would not allow me to attach the equivalent 8k 16bit PCM (220KB) wav because it complained that the file size was too big and exceeded the 30KB attachment limit !

    Blackberry, Android, Iphone and all Windows clients can all play these GSM 6.10 wav files natively. This can be verified by emailing yourself the 8k GSM wav sample attachment and trying to play it on your mobile device.

    Edit;
    As Marc requested, I've submitted a feature request which you can vote for here;
    http://3cx.ideascale.com/a/dtd/Voicemail-to-Email-wav-file-size-reduction/83096-9854
     

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  2. abc123

    abc123 Active Member

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    Great Post!

    Go to http://3cx.ideascale.com and post it in the feature request. Then post the link here so we can vote on it
     
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  3. VDiesel

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    Hi Marc, thanks for your reply and support.

    I'm slightly reluctant to classify this as a "feature" request.
    Rather than a feature, this is a necessity if 3CX is to be considered seriously by enterprise customers.

    I hope that the 3CX team will consider this seriously as I'm sure they want their product to be as appealing as possible to the enterprise in this very competitive segment. It can be corrected easily and quickly.

    In any case, I appreciate your suggestion and have posted it in ideascale just the same.
    You can vote for it here;
    http://3cx.ideascale.com/a/dtd/Voicemail-to-Email-wav-file-size-reduction/83096-9854
     
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