Message Size

[technicalUser2222]

I can't find anywhere. Does someone know the approximate storage space ratio for a voicemail message on a 250? Is it different on Arias and Serenades? If you have a link to information, i would appreciate it.

Thanks.

 

[jon24422531]

This is an excerpt from a paper on the hardware used in an Octel 200/300. It is different on Arias, but I do not have the relevant information on that.

Many features and applications associated with voice information processing, such as voice messaging, telephone answering and fax processing, are variations of the voice-store-and-forward concept. Some voice information processing applications require additional data processing capabilities. For example, interactive voice response (IVR) applications require access to databases. Workflow applications require access to enterprise software such as Lotus Notes. Data connectivity is also required as the integration of voice information processing into the electronic office continues. The technologies required to process voice are different from those required to process data due to the significant differences in the storage methods of voice and data. The processes of digitising speech to represent the speaker’s own voice is extremely "byte-intensive." For example, Octel 200 and 300 servers require approximately 24,000 bits or 3,000 bytes (1 byte = 8 bits) of data to encode 1 second of speech. Therefore, a 10-letter word, such as "compatible," which takes approximately 1 second to speak, is represented using 3,000 bytes of data. If that 1 second of speech is represented in a textual form, that is, without a particular voice pattern, only 10 bytes of data are required (1 byte per character).
The most significant impact of this difference between storing voice and data is system performance. The processing power required to create, transport and store each byte associated with digitised voice is much greater than the power required to process the same amount of textual information. If there is not enough power to process voice, the performance of voice applications can be compromised.
The fundamental differences between voice and data applications affect the architectural design of a server that processes voice information. To support both types of applications most efficiently and cost-effectively, the Octel 200 and 300 servers have two architecture components ¾ a voice and fax processor and a data processor, each optimised for the unique and separate requirements of voice, fax and data processing.


Jonathan

http://www.telecom-stuff.com

 

[Irish1Pat]

TechnicalUser2222,
You have touched on a very extensive subject area - for the Aria platform. Because there are so many different types of messages and depending upon how the message arrives into the Aria mbx, the length of each type of message greatly varies. Thus, there can be no correlation, such as number of seconds to number of bytes for a message - on the Aria platform.
I had to trace out a voice message some time ago and it was not very pretty - took several days to go byte by byte through the message and sometimes nibble by nibble.

Pat

 

[technicalUser2222]

Thanks everyone. It was actually a 200...

I found the info, actually tested myself.

Stores messages in blocks. One block is = to (approx.) 2.5 seconds. Each block takes 8K of storage space. I had another source who said "either" 1.33 seconds or 2.67 seconds depending on software version and model so that 2.5 seconds seemed to be close. So I recorded a message in a virgin mailbox. It was a 13 second message, it it used 4 blocks. Did the math.

BTW, this exercise was for a customer that wants to implement redundant messaging.

Thanks.