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CERN 12 de Feb 2.004. CSSM Working Group. Jose María Fontanillo Muñiz mailto: [email protected] Jabber-id: [email protected] GDS: 0034 1000 001 http://www.rediris.es/mmedia RedIRIS. GDS. Global Dialling Scheme Numbering plan H.323 gatekeeper:

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slide1

CERN

12 de Feb 2.004

CSSM

Working Group

Jose María Fontanillo Muñiz

mailto: [email protected]

Jabber-id: [email protected]

GDS: 0034 1000 001

http://www.rediris.es/mmedia

RedIRIS

slide2
GDS
  • Global Dialling Scheme
  • Numbering plan
  • H.323 gatekeeper:
    • Optional element in H.323.
    • Mandatory functions: address translation, admision control, bandwith control and zone management
    • Optional functions: call authoritation, call management, bandwith management and call control signalling.
slide3

H.323 Application

RTP /

RTCP

RAS

H.245

H.225.0

TCP-UDP/IP

GDS
  • An H.323 Gatekeeper can work in several ways:
    • Only Location (LRQ, LCF and LRJ) without endpoints registered<- directory
    • With endpoints registered and direct signalling between endpoints
    • Routing H.225/H.245 signalling
    • Proxy
slide5
GDS

GK

Mundial

0031

001

0034

GK España

GK Holanda

GK EEUU

GK Directorio

1001

1002

UC3M

1234

GK Instituciones

UIB

...

UnIY

00341001001

00311234001

slide6
GDS
  • Defines 00 as the international prefix.
  • It uses well known ITU international telephone prefixes:

http://www.itu.int/itudoc/itu-t/ob-lists/icc/e164_717.pdf

  • The GDS also defines an alphanumeric dialplan :< station ID>@<fully qualified domain name of the institution>
  • Spanish national plan:

<number> = [<escape prefix>] <international part> <national part> <international part>=0034 <national part> = <institution prefix><endpoint number>[<sufix>] <endpoint number> = nnnn

gds our implementation
GDS-Our Implementation
  • Cisco 2600 router with the MCM extension of IOS as national gatekeeper
  • Gnugk (www.gnugk.org) as gatekeeper for our endpoints
gds applications
GDS-Applications
  • ¿why?
    • Makes independence the id of terminal IP
    • More easy multiconference using an MCU, you only need to dial a number
    • It can be used to videoconference and VoIP
    • Is the facto standard numering plan in research and academic world

Example you can have your GDS number that can follow you , when you are in your office and you have bandwidth you can use your videoconference system, sometimes with a gateway you can redirect the call to a cellular telephone, sometimes to a IP phone in your house, etc

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