[Asterisk-Users] Sangoma E1 board Experience

janvb at caselaboratories.com janvb at caselaboratories.com
Sun Dec 18 13:51:52 MST 2005


>Its not a limitation. Its an architectural design which is based on pulse 
>code modulation (pcm) standards, which essentially says:
> - 8,000 audio samples per second,
> - each sample is an 8-bit value
> - resulting in 64,000 bits/second (like g711 codec standard)
>  
>
Thank you for your answer, but I don't think you read/understood my 
question?

The Zaptel driver uses a 8 byte buffer for buffering G.711 in each 
direction. This has nothing to do with the sample rate, but how large 
packets you can buffer the voice for to be transported through the PCI 
interface. I get the impression that the Digium boards are limited to 8 
bytes (1 ms ) by reading the zaptel driver. But, I don't know this cause 
I have no hardware manual that cover the PCI interface. I was hoping 
that the Sangoma boards offered a more variable buffer size???

jvb




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