>The way LNP works is a good example of PSTN style routing scaling. ... >When a phone call is made, a TCAP query is launched by the originating >switch to a set of STPs that then route it to an LNP database, that has >a full list of every ported number, and its LRN, and a few other tidbits >of info.
Right. That works great in an environment where the regulators require that every telco pay Neustar to maintain the LNP databases, and send all the updates promptly when a number is ported or disconnected. The telcos pay Neustar $300 million a year to run the database. I'm sure they'd be delighted to run a similar database for IP networks at a similar price. Of course, that just handles the networks in the U.S. Regards, John Levine, jo...@iecc.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. http://jl.ly
