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Message Compression and storage on the Hard Drive

Anybody know what the formula is for how many seconds, or minutes, or hours of storage per Giga Byte on the Exchange hard drive?

  • Other Collaboration Voice and Video Subjects
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Cisco Employee

Re: Message Compression and storage on the Hard Drive

I do not know the formula, but here are some examples of voice messages per codec.

Voice Message File Sizes and Audio Quality Ratings

Audio Codec G.711 Mu-Law and A-Law

Approximate File Size, 1-Minute Message 480 KB

Quality Rating Excellent

Audio Codec OKI ADPCM 8 kHz

Approximate File Size, 1-Minute Message 240 KB

Quality Rating Fine

Audio Codec OKI ADPCM 6 kHz

Approximate File Size, 1-Minute Message 180 KB

Quality Rating Fine

Audio Codec GSM 6.10

Approximate File Size, 1-Minute Message 98 KB

Quality Rating Good

Audio Codec G.729a

Approximate File Size, 1-Minute Message 60 KB

Quality Rating Good

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