I'm looking to build an Asterisk system to place in front of my call center switch. My plan is to eat up 4 PRIs in one office, send to my other office and convert back to PRI for my legacy switch. Voice quality is critical, would I be better off going with a Cisco AS5350 using hardware DSPs for the g.729 codec or is the Digium g.729 codec just as good with enough CPU to throw at it. The lack of dedicated DSP concerns me
Option 1
PSTN PRI -> AS5350 -> (2 x T1) IP(SIP,g.729) -> AS5350 -> PRI -> PBX
I would have 1 Asterisk server handling SIP, Conference, IVR, Voice Mail. I would purchase a bunch of g.729 codec licenses
Option 2
PSTN PRI -> Asterisk -> (2x T1) IP (IAX2, g.729) -> Asterisk -> PRI -> PBX
The first Asterisk would handle SIP, Conference, IVR, Voice Mail
If the voice quality of the software g.729 codec is as good as the Cisco hardware codec I would *much* rather give my money to Digium, buy their hardware and licenses. If the quality isn't as good I may be forced to spend $40k on AS5350s
I'm thinking 2.8 Ghz P-IV HT with 2 GB RAM for each Asterisk server.
-Matt
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