[Asterisk-Users] four wildcards in a single pc

[Steven Critchfield]

On Thu, 2004-12-09 at 20:59 +0100, Peter Svensson wrote:
> On Thu, 9 Dec 2004, Steven Critchfield wrote:
> 
> > Digium cards need 1000 interupts per card per second due to the lack of
> > onboard buffer. The buffer was left off of the design to keep the design
> > simple and therefore inexpensive. All the cards present 8 bits of data
> > per channel during that interupt and as all telephony is 8000 bits per
> > channel per second.... 8000/8 = 1000 service needs per second. An
> > interupt is the way hardware requests service. 
> 
> A channel is 64000 bits per second or 8000 8-bit samples. The Digium cards 
> transfer 8 samples or 64 bits per interrupt per channel. 
> 
> Another important reason for the small buffer is to minimize the latency
> of a call switched through Asterisk. Larger buffers would imply larger 
> latnecies and latency is the enemy of voice communication for several 
> reasons that are listed in the wiki.

This is a good example for the newbies of the list as to why proper
formatting and list ettiquitte is important. I made a mistake, it was
easy enough for someone to come around behind me and correct the
message. We all can make mistakes.
-- 
Steven Critchfield <critch at basesys.com>