Issues with toll free numbers
Recently I found that I could not dial toll free numbers in The Netherlands (for example +31-800-0429). Voxalot does an ENUM lookup for this number and e164.org returns sip:318000429@selfnet.at. But the call failed. I got an error "503 Service Unavailable", "No route to destination".
It turns out that e164.org routes every toll free number in The Netherlands to selfnet.at. Same thing for other countries. UK toll free numbers for example are routed through 3 providers: public.sip.magrathea.net, selfnet.at and freenum.sip.telecomplete.net. But only the last one worked for me. This means that companies like Selfnet.at and Magrathea.net offer to route toll free calls but they do not live up to their promises. I exchanged a couple of mails with Duane (aka evilbunny) of e164.org. Here are some of my observations:
Any other thoughts on this? |
I believe that there is also a situation where the owner of the toll free number is preventing calls from being connected from certain locations within the same country. If the toll free sip address provider is actually placing the call from one of these locations then it doesn't get connected.
I too have have found ENUM is not always reliable for UK toll free so I now specify my preferred provider as a VSP and always use the same one with ENUM disabled in the dial plans. Sipbroker is working ok for me with US toll free however. |
Quote:
Originally we allowed everyone to set their own preference and order, but changed this in subsequant policy choices to only allow people to set order, but not preference. So these non-verified numbers can easily be excluded by ignoring anything with a preference over 100, also the system will return the most specific to least specific responses. e164.org is a directory service, we just return information in our database, it's up to the people requesting the information to handle it in a way best suited to them. Other directory services use varying policies, for e164.arpa the policy can vary on a per country, or perhaps smaller basis, to find out the actual policy for inclusion for each directory you would need to do a lot of research as I doubt you can make sweeping claims like that and the claim actually be true. |
I've thought about this some more, and the answer is rather obvious, if a particular provider can't route certain numbers we can list a more specific provider that can, or use a notel record to exclude anything useful from being returned.
thoughts? |
Well I suggest that a listing of specific providers concerning this service is a good try.
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