[AusNOG] Telephone Number Management Systems

[Mark Smith]

>________________________________
> From: Andrew Yager <andrew at rwts.com.au>
>To: ausnog at lists.ausnog.net 
>Sent: Monday, 12 November 2012 10:39 AM
>Subject: [AusNOG] Telephone Number Management Systems
> 
>
>Hi,
>
>
>I'm frequently seeing discussions on-list about IPAM products etc; but was curious if anyone had any good tools for telephone number management?
>
>
>I see that it's very similar to IP address management in many senses, with some additions in that you'd like to probably also store IPND details, and associate numbers against VoIP services.
>
>
>In my case it's that I have many hundreds of unused numbers and am looking for a better way to manage than our custom in-house software; and also looking for better international number support.
>
>
>Thoughts/comments welcome :)
>

If you have an IPv6 capable IPAM, you could reserve one of your /64 prefixes, and then use the remaining 16 digits in the 64 bit Interface Identifier field to encode the E.164 values. e.g. using the documentation IPv6 prefix, and using IPv6 /64 subnet 0xffff for your E.164 values, 2001:db8:0:ffff::618:1234:5678/64 for +618 1234 5678.

Alternatively you could generate a special use ULA for that purpose (http://www.kame.net/~suz/gen-ula.html), and to simplify things, use the 0x0000 subnet.

Another thing you could do with your IPv6 IPAM is use the IPv4 Mapped IPv6 Address format to also use it to store your IPv4 addresses e.g. for 192.168.0.0/24, the IPv4 Mapped IPv6 address form is ::ffff:192.168.0.0/120. You could use one of your /64s or a /64 from within a ULA similarly, however one advantage of using the IPv4 Mapped IPv6 Address format is that if you have the source for your IPAM you could doctor it to hide the ::ffff/96 prefix behind the user interface, so people are entering and seeing IPv4 addresses, even though in the backend database they're really IPv4 Mapped IPv6 Address prefix with a length between 96 and 128 bits. (Sure it'll use up extra disk space, but if you're counting bytes on your storage, you're already sailing too close to the wind.)

>
>Andrew
>
>
>--
>Andrew Yager, Managing Director   (MACS Snr CP BCompSc MCP MCE JNCIA-Junos)
>Real World Technology Solutions Pty Ltd  - IT people you can trust
>ph: 1300 798 718 or (02) 9037 0500
>fax: (02) 9037 0591 mob: 0405 152 568
>http://www.rwts.com.au/
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