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: [email protected] [mailto:[email protected]] 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" <[email protected]> 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: [email protected] > > W: http://www.3c.co.uk > > > > > > -- > > > > > > _____________________________________________________________________ > > -- Bandwidth and Colocation Pr... > > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-biz mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-biz -- David Knell, Director, 3C Limited T: +44 20 3298 2000 E: [email protected] W: http://www.3c.co.uk -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz
