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 <[EMAIL PROTECTED]> _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
