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Numbering Schemes | 297 comments | Create New Account
Comments belong to whoever posts them. Please notify us of inappropriate comments.
Numbering Schemes
Authored by: JamesK on Monday, January 21 2013 @ 02:14 PM EST
if one has a static, public IP address

One reason people have DHCP addresses is because of the lack of IPv4 addresses.
Even still, it is possible to use Dynamic DNS, which follows the IP address,
should it change. With my own ISP, my IPv4 address is virtually static and the
host name, derived from firewall & modem MAC addresses, is static. In my
earlier note, I mentioned IPv6 will be required to fully use the VoIP
capabilities. With IPv6 you not only get an address, but a subnet. ISPs are
supposed to hand out subnets that are no smaller that /64. My own, personal
IPv6 /56 subnet contains 2^72 static addresses. That's about a trillion times
the size of the entire IPv4 address space. When it comes to addressing VoIP and
other SIP services, you can use something called "Address of Record",
which may be similar to an email address. All your capable devices connect to
your service provider's server to register. Then when a call or message comes
in, you answer with whatever device is handy. At this point, your provider
exchanges your current IP address with the the other party's provider and get's
their IP address in return, which is then sent to your device. At this point
the server is generally no longer required and the two end devices directly
negotiate for the best connection, which may include video. This negotiation
and following communications are done direct IP address to IP address. So, you
don't have to advertise your IP address for each device. Also, with IPv6, you
can have an address that contains a 64 bit random number, that changes
frequently, to enhance your privacy.

The following program contains immature subject matter.
Viewer discretion is advised.

[ Reply to This | Parent | # ]

  • P2P - Authored by: Gringo_ on Monday, January 21 2013 @ 07:50 PM EST
    • P2P - Authored by: JamesK on Monday, January 21 2013 @ 09:20 PM EST
Numbering Schemes
Authored by: Wol on Monday, January 21 2013 @ 03:20 PM EST
Static addresses are readily available (if you know where to look).

When I first got Internet, back in 1996, I had a static address which I kept
until I went to broadband. I'm not sure whether that address was static, but it
probably was.

I've recently changed ISP and I don't know how the new system works, so I can't
say, but I've probably had a fixed static IP (as part of the default service)
for over half my time on the net, at least ...


[ Reply to This | Parent | # ]

Numbering Schemes
Authored by: Ian Al on Tuesday, January 22 2013 @ 05:17 AM EST
As other commenters explain, IPV6 is likely to result in static IP addresses,
even for domestic users and network aware refrigerators.

If you have more than one device connected to your router, you already have a
private addressing scheme. With Skype, you have a centrally administered private
voip address scheme (only invited participants are permitted to call you) and
centrally administered routing. There is no international phone book of public
numbers for Skype.

Another commenter explained that he had even come up with a way of providing his
own privately administered address and routing scheme using dynamic IPV4
addressing, just not for voip. Any such scheme can be used for any internet P2P
communication protocol including voip.

The advantage of centrally administered voip addressing and routing is the
provision of access (at a price) to gateways into the telephone international
telephone numbering scheme and switching network.

The disadvantage is that the current market leader runs on the Windows operating
system, although I understand there are Android apps available for Skype. Open
standards will eventually lead to Skype being marginalised.

Ian Al
Software Patents: It's the disclosed functions in the patent, stupid!

[ Reply to This | Parent | # ]

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