If
reliability is the issue, then use the PRI *first* then failover to
VoIP.
If
cost savings are the issue, use VoIP then have a 2nd VoIP provider to fail over
to, and no PRI.
In
either scenario, inbound call routing is thorny, some guys that provide both PRI
and VoIP can route calls automatically on failover.
However, you *will* get 5 9's in any kind of PRI scenario, that is what
it is designed to do. If your voice downtime is measured in hundreds or
thousands of dollars a minute, use a PRI.
ROI on
Asterisk depends on how you look at it. I enjoy the fact that licensing costs
are zero and you can make it do way cool stuff, and you have access to a huge
3rd party market. But I would get my ass canned if I went to VoIP only and it
went down. I do have a hybrid install with a SIP 12 channel connection and 2
BRI's for failover, and the cost savings are 30% over a frac PRI. You don't
nessisarily have to do a 1-1 backup of your voice channels, all you need is
enough to support 80% or so of your estimated average concurrent use and
chances are your users will never know the difference in a failover situation
unless it's another 9/11 and everyone is calling out. In that case, you can say,
hey, it's another 9/11, no kidding the phones didn't work.
-----Original Message-----
From: stan ford [mailto:[EMAIL PROTECTED]
Sent: Monday, October 02, 2006 10:55 AM
To: [email protected]
Subject: [asterisk-users] t1 voip to failover priI'm confused with something, maybe someone can explain to me.if your currently on a pri and are considering moving over to VOIP, that means you would have to purchase a t1 or fractional t1 for a your voip connections.but then, voip connections aren't as reliable as PRI. so then you would probbaly have to get a PRI failover.but then having a PRI failover means that you now have to pay 400 for a T1, then another 400 for your PRI line. wouldn't have you have just defeated the cause of savig money by now having to have a PRI on standby? now costing you 800 a month? wouldn't it almost be the same price to stick with the PRI only?is anyone out there, using a VOIP only with no failover?__________________________________________________
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