[asterisk-biz] PRI vs SIP vs ???

[Don Kelly]

It may be different in the UK. 5-9s is the expectation with LECs in the US.
Many of us have had T1s that have been up for a dozen years with no
failures.

--Don




-----Original Message-----
From: asterisk-biz-bounces at lists.digium.com
[mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of David Knell
Sent: Saturday, October 30, 2010 10:59 AM
To: Commercial and Business-Oriented Asterisk Discussion
Subject: Re: [asterisk-biz] PRI vs SIP vs ???

On Sat, 2010-10-30 at 06:13 -0400, Zeeshan Zakaria wrote:
> Doesn't matter how good VoIP is, there is no comparison with a real
> physical line. For absolutely 0 tolerance, guaranteed voice quality
> and 99.999% uptime, a physical T1 is the only solution.

A physical T1 won't give you 99.999% uptime (that's five minutes of
downtime every year), and a semi-decent VoIP solution can give
guaranteed quality: we used to offer SDSL lines direct into our
platform, run G.711 over them and the quality was indistinguishable from
calls running over a PRI.

--Dave

> However as it is becoming an increasing trend in North American
> market, including many major and big (careless) corporations, to
> switch to cheap and crap voice quality and let the callers suffer, so
> if the customer doesn't care about quality, reliability and stability,
> SIP only solution should just be perfectly fine. Poor ordinary public
> is after all made to get used to it anyways.
> 
> 
> Zeeshan A Zakaria
> 
> --
> www.ilovetovoip.com
> www.pbxforall.com (beta)
> 
> > On 2010-10-30 4:50 AM, "David Knell" <dave at 3c.co.uk> wrote:
> > 
> > Hi Brian,
> > 
> > 
> > 
> > > Gotta client that is moving to a VoIP PBX. Will need 10 concurrent
> > > calls with ability to grow ...
> > 
> > Option (a) gives you diversity - ask yourself just how bad it'd be
> > if
> > their phone system went down because their DSL line wasn't working,
> > and
> > then balance this against the extra cost of the PRI.
> > 
> > --Dave
> > 
> > 
> > > --
> > 
> > 
> > >
> > _____________________________________________________________________
> > > -- Bandwidth and Colocatio...
> > 
> > David Knell, Director, 3C Limited
> > T: +44 20 3298 2000
> > E: dave at 3c.co.uk
> > W: http://www.3c.co.uk
> > 
> > 
> > --
> > 
> > 
> > _____________________________________________________________________
> > -- Bandwidth and Colocation Pr...
> > 
> 
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-- 
David Knell, Director, 3C Limited
T: +44 20 3298 2000
E: dave at 3c.co.uk
W: http://www.3c.co.uk


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