<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On 4 Feb 2006, at 23:33, Chris Bagnall wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">You need to get BT to agree and allocate or port the numbers.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">You need to agree how many digits BT will pass on to you<SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">(probably 1925838395 but possibly just the last 2)</DIV> </BLOCKQUOTE><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I don't know the number of digits that BT pass through on a PRI, but on a</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">set of BRIs with a range of DDIs, they're passing the last 6 digits (so</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">given the OP's range, you'd want to match on 838381 etc.)</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I concur with Tim's suggestion of trying to get the internal extensions</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">related to the DDIs - it'll simplify your dialplan substantially.</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Out of curiosity, why do you want to go to BT for the number range? 8</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">channels through BT will cost a small fortune, and you could run 8</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">concurrent calls over a standard ADSL connection in the UK with appropriate</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">codec selections. There are at least 3 or 4 companies in the UK that'll</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">offer you a consecutive number range for a UK area code.</DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Only a small fortune though :-) my 8 NTL lines are £13/month (each)</DIV><DIV>BT do a similar deal. (what is a business grade ADSL line now? £50/month?)</DIV><DIV>Where a VOIP supplier you might save big-time would be on the call</DIV><DIV>costs.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>If you sign up with a VOIP provider for business purposes,</DIV><DIV>make _absolutely sure_ you understand the risks.</DIV><DIV>Check the SLA and compare to BT/NTL's</DIV><DIV>Check your ISP's SLA.</DIV><DIV>Make sure you own the numbers and can port them off</DIV><DIV>to another provider (or a traditional telco).</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I looked at these factors and decided that VOIP was too risky for</DIV><DIV>our main number, but fine for 'extras' and low cost international.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>This was based on an experience we had 18 months ago,</DIV><DIV>BT had a major fire in the local exchange trunk in Manchester.</DIV><DIV>They had the phones working or redirected to mobiles within</DIV><DIV>hours. (NTL just kept working as they were on a fibre that didn't</DIV><DIV>pass through that duct). Our ISP was unable to offer any sort</DIV><DIV>of service for the best part of 10 days, and we were paying</DIV><DIV>£6k/yr for the leased line. If our phones had been over that</DIV><DIV>we would have been out of business for 10 days. </DIV><BR><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">You'd also avoid a substantial chunk of potential echo issues. The asterisk</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">deployments we've done where the client has had calls delivered via IAX from</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">a provider have all been *much* easier and taken far less time than when we</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">have to fight with ISDN lines, or worse, analogue lines.</DIV></BLOCKQUOTE><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I'm pretty happy with my Digium PRI card, and it isn't even one with</DIV><DIV>echo canceling hardware. I haven't touched analog or BRI, as</DIV><DIV>yet.</DIV><BR><BLOCKQUOTE type="cite"><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Regards,</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><BR></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Chris</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">--<SPAN class="Apple-converted-space"> </SPAN></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">C.M. Bagnall, Director, Minotaur I.T. 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