[Asterisk-Users] Is Asterisk suitable for this use?

Andrew Kohlsmith akohlsmith-asterisk at benshaw.com
Sun Nov 23 08:40:26 MST 2003


> How's this worse than an as5300? I could install ata-flash and get
> high-ish end pc hardware (rcc serverworks boards, etc). Heck, if it
> was such an evil thing, I'm sure Voicepulse (along with every other
> clec) and friends wouldn't be doing it!

The dialup ISP I worked at used MaxTNTs with DS3s...  665 ports would die if 
someone tripped over both power cords or someone zapped the DS3 cables.  
Mind you the whole system was backplane and hotswap...

I guess a bigger question is how many TE410P cards can PCI handle?  I mean 
my rough figuring would say this:

DS1 = 8kB/sec * 24 = 192kB/sec 
PCI = 33Mhz * 4 bytes/clock = 132MB/sec

I get 132MB/sec / 192kB/sec or 687 DS1s __IF__ you're not spewing that data 
back out the PCI bus.  Let's say that there's no codec translation going on 
and whatever comes in is going out again...  so halve that or 343 DS1s, 
again strictly theoretical.

From discussing on the IRC channel this morning the TE410P can bus master 
one frame from all spans at once; Burst transfers are PCI's bread and 
butter so if you have bus-mastering network and storage devices too, I 
imagine you'd run into CPU issues from codec translation before you'd run 
into PCI bandwidth issues...  

Anyone please feel free to jump in and correct me.  :-)

Regards,
Andrew



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