| VOIP and Taxes |
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from: http://www.freenum.org/
ISN provides an easy way for campuses, enterprises, and ASPs to
acquire globally-unique subscriber numbers to support new
communications services. ISNs are free, fast, and forever yours;
they may be used to support SIP, XMPP, H.323 or other
communications; and, they provide a domain-based, "Internet-style"
number that looks more like an email address than a traditional
E.164 telephone number.
An ISN is formed by joining a domain-local subscriber number to an
ITAD (Internet Telephony Administrative Domain) number, using an
asterisk as the delimiter. For example, subscriber 1234 in ITAD
256 would have ISN: 1234*256.
Think of an ISN as an Internet-style phone number, where the
asterisk is analogous to the @ sign in an email address.
Internet Telephony Administrative Domains (ITADs) were defined in
Telephony Routing over IP (TRIP) [RFC 3219]. But, since TRIP never
gained much traction, ITADs didn't either. ISN gives ITADs new
life.
more links:
http://www.internet2.edu/sip.edu/isn/
Note: These folks have graciously let me join in their grand
experiment, but I'm in no way a spokesperson for them. It just seems
like an idea who's time has come and I'm happy to try to spread the
word.
Wolfgang S. Rupprecht http://www.wsrcc.com/wolfgang/