© Copyright AARNet Pty Ltd Video How to peer H.323 VoIP Networks APAN Korea August 2003 ViDe.Net...

©Copyright AARNet Pty Ltd

Video How to peer H.323 VoIP Networks

APAN Korea August 2003ViDe.Net sponsored international root H.323 Gatekeepers


Contents

•Overview of H.323 routing

•Gatekeepers in a hierarchy

•What is a dialplan?

•Who is ViDe.Net?

•ViDe.Net sponsored international “root gatekeepers”

•How to peer with the ViDe.net roots.

•The future: ENUM


Overview of H.323 routing

PABXH323Voice

GATEWAY

GATEKEEPERTranslate telephone numbers to IP

addresses

AARNetInternet with

QoS bandwidth

H.323 Terminal

PSTNCarrier

H323 VoiceGATEWAY

Otheradvanced IP

networks


Routing in H.323

• Is done by Gatekeepers.•Gatekeepers turn Telephone numbers (eg 61 2 6222 3555) and H.323 aliases ([email protected]) into IP Addresses (similar to the DNS service).

•Gatekeepers can be configured in a hierarchy, just like DNS servers.

•Gatekeepers/H.323 does not easily handle different dialplans, so best settle on one dialplan, internationally!


PSTN

IP CallServer

IP Phones

International

0 0011 44 2 6222 3555

0011 44 2 6222 3555

44 2 6222 3555PSTN

IP CallServer

IP Phones0 02 6222 3555

02 6222 3555

0 3744 2222

PSTN

IP CallServer

IP Phones

3744 2222

PSTN

IP CallServer

IP Phones

Australian PSTN (Telephone) Number Plan exampleH.323 can not easily change from one dialplan to another


Who is ViDe.net

• www.video.net, ViDeNet comes from the Latin word vide, meaning "to see“, and ViDeNet is a virtual network that helps individuals from around the planet to see and hear one another.

• The key is the co-operation and co-ordination of people who run Gatekeepers.

• The key is the acceptance of a global Dialing Scheme (dialplan). The ViDe.Net dialplan is based on the International Telephone Dialplan (ITU-t E.164) with 00 in the front. So E.164 +61 2 6222 3555 would be a ViDe.Net 00 61 2 6222 3555.

• ViDe.Net have sponsored 4 international root Gatekeepers (like the DNS roots), two in USA, one in Wales, and the other in Australia for the Asia/Pacific time zone.


H.323 Gatekeeper hierarchy

PABX

Gateway

Australian rootGatekeeper

International rootGatekeeper mesh viDe.net

and AARNet sponsored in Asia

MemberGatekeeper

Video conference device

H.323 proxyin parallel with Firewall

IP PhoneCall Server

AARNet publicGatekeeper

Gatekeeper in "routed mode", orBack-to-back IP Gateway

to do number plan translation


Gatekeeper details

• International roots– There are four. – Each is a redundant pair of Radvision ECS Gatekeepers in “direct

mode”. Asia pacific Gatekeeper is at a major AARNet POP, Canberra Australia.

– 203.22.212.235• Australian Root

– Cisco MCM IOS, version 12.2(1a) on a 3640– 203.22.212.242.

• Public GK– Cisco MCM IOS, version 12.2(1a) on a 3640– 203.22.212.245

• Configuration template will be available at http://www.aarnet.edu.au/engineering


How to peer your Countries National Root Gatekeeper

• Visit www.vide.net, select “Enter ViDe.Net”.• Subscribe to the ViDe Announce list for up-to-date news • Read all the material under “I am just looking”.• If you think you are the person to run your coutries national

root gatekeeper then:–Create one or more New Zone Administrator Accounts–Create a Zone for your Country.–Your request will be processed to see if you are and you

will be contacted.

• AARNet will help with the registration and peering, find Don Robertson, John Barlow at the conference. Or contact [email protected], +61 2 6222 3537.


Other networks

• Generally all are moving towards full E.164 (not 00 + E.164).

• ENUM uses full E.164!• What does the Internet2’s VoIP Working Group use? –

A question for Walt Magnussen.• AARNet uses full E.164 dialplan in Australia and is

deploying a ip-ip gateway to do the number translation to peer with ViDe.Net.


ENUM the answer???

• ENUM is many things, but in the context of VoIP it is an extension to the DNS to support telephone number routing. We do not need root gatekeepers!

• Get involved and/or assist your Country to get your Countries E.164 International Country code delegated in the DNS to a nameserver in your country. See http://www.itu.int/ITU-T/inr/enum/index.html

• Suits IETF’s SIP protocol really well.• Do we need an equivalent SIP “roots” while we wait for ENUM?


Thank you

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