[asterisk-biz] ATA Bank for Asterisk, 400 phones

[Gregory Boehnlein]

> I would like to add some information about the capacity of the USB 2.0
> connection. The USB 2.0 interface provides a theoretical speed of
> 480,000,000 bits per second. A typical uncompressed phone conversation
> uses about 64,000 bits per second per direction, plus some overhead; in
> total less than 200,000 bits per second per phone call is used. Thus, the
> theoretical concurrent number of conversations that the USB 2.0
> interface can handle is 480,000,000 divided by 200,000: roughly 2,400
calls for a
> single USB 2.0 port. For more info, see
> http://www.xorcom.com/astribank-technology/usb2-interface.html

Have you done this in production? Is there an actual case study and/or
company that is doing this with the hardware that I can speak with? I'd like
to see what performance is like with 256 active channels on a USB bus.

> Bottom line...the USB connection is not the bottleneck.