On Nov 18, 2004, at 12:49 PM, [EMAIL PROTECTED] wrote:
On Thu, 18 Nov 2004, Mike M wrote:
Sometimes in the so-called unchannelized streams you are informed ofGiven that its a tough problem to drive current generation of quad-T1
where the frame boundry is in the bitstream. With that information one
can create soft-channelization. Perhaps this is unreasonable for a DS3
however.
cards without frame slips, I think doing soft-ds3 stuff is crazy. It could
be possible given enough buffers...But I think its crazy ;)
Yeah, but how many of the frame slips would disappear if you added a couple extra ms worth of buffering on the card? If we were willing to add a bit of extra latency on TDM circuits and add a few bucks to the cost of the cards, it seems like the frame slip problem would disappear, because we wouldn't require hard 1 ms interrupt latencies anymore. I mean, modern PCs can clearly handle over 1 Gbps of bus-mastered data traffic, so there's no real reason to assume that they couldn't handle 45 Mbps of voice traffic *if* the interface between the computer and the card was reasonable and we didn't have to do much more then slap headers on buffers and ship them out.
I'm not convinced that the economics for DS3 cards makes a lot of sense, but I don't think the technology is completely out of our reach, either.
Scott
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