On 11/20/2004 8:18 AM, Alex Bligh wrote:
But I'm not sure you'd like it applied to the internet. Firstly, in essence, PSTN uses static routes for interprovider routing (not quite true, but nearly - if you add a new prefix everyone else has to build it into their table on all switches). Secondly, IIRC porting works in the UK something like - call delivered to switch of operator who owns the block, marked as ported number, lookup in central porting database (one for all operators), operator port prefix put on dialed number, call sent back out all the way to interconnect, enters new operator network, goes to switch managing ports, further signalling info added to make call go to the correct local switch, call goes to correct local switch, dross removed, call terminated.
Sounds like DNS. We also get semi-annual drive-by proposals to stick the routing info into DNS, of course. -- Eric A. Hall http://www.ehsco.com/ Internet Core Protocols http://www.oreilly.com/catalog/coreprot/