On 06/10/2015 12:52 PM, Juha Heinanen wrote:
i wonder how it is possible to have so many distinct e.164 prefixes for transit unless you need to deal with individual subscriber numbers.
It's quite possible for folks who run dialler traffic[1], at least in the US. The reasons are:
- Most rate centres in the US are subject to number pooling, which allocates numbers in blocks of 1000 using 7-digit prefixes. This yields a stupefyingly large number of prefixes just for domestic USA routing.
- Wholesale ITSPs, particularly ones specialising in short-duration traffic, typically utilise a large number of vendors, since many of them will fail the call due to race-to-the-bottom LCR. We once had a customer with 135 million routes from around 30 different vendors.
-- Alex [1] Incidentally, the subject of my recent Kamailio World talk! https://www.youtube.com/watch?v=u30Fyp3QanE -- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
