mmedia@rediris.es

mmedia

Jose María Fontanillo Muñizmailto: Jmaria.fontanillo@rediris.esJabber-id: fonta@im.rediris.esGDS: 0034 1000 001http://www.rediris.es/mmediaRedIRIS

CERN12 de Feb 2.004

CSSM Working Group

CSSM Working Group

2Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

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.

3Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

GDS

RASRTP / RTCP

H.225.0

H.245

H.323 Application

TCP-UDP/IP

• 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

4Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

GDS

5Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

GDS

GK Mundial

GK Mundial

GK EEUUGK EEUUGK HolandaGK HolandaGK EspañaGK España

UC3MUC3M UIBUIB ......

GK DirectorioGK Directorio

GK InstitucionesGK Instituciones

UnIYUnIY

00341001001003410010010031123400100311234001

00340034 00310031

1001100110021002

12341234

001001

6Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

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

7Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

GDS-Prefixes

Prefix Institution

1000 RedIRIS

1001 UC3M

1002 UIB

1003 CESGA

1004 UM

1005 UPC

1006 XTEC

1007 IFAE

1008 ESADE

... ...

8Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

GDS-Our Implementation

• Cisco 2600 router with the MCM extension of IOS as national gatekeeper

• Gnugk (www.gnugk.org) as gatekeeper for our endpoints

9Jose María Fontanillo Muñiz – mmedia@rediris.es CERN 2004

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 worldExample 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