mmedia Jose María Fontanillo Muñiz mailto: Jabber-id: GDS: RedIRIS CERN 12 de Feb CSSM Working Group

2 Jose María Fontanillo Muñiz – 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.

3 Jose María Fontanillo Muñiz – CERN 2004 GDS RAS RTP / RTCP H 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

4 Jose María Fontanillo Muñiz – CERN 2004 GDS

5 Jose María Fontanillo Muñiz – CERN 2004 GDS GK Mundial GK EEUU GK Holanda GK España UC3M UIB... GK Directorio GK Instituciones UnIY

6 Jose María Fontanillo Muñiz – CERN 2004 GDS Defines 00 as the international prefix. It uses well known ITU international telephone prefixes: The GDS also defines an alphanumeric dialplan Spanish national plan: <number> = [<escape prefix>] <international part> <national part> <international part>=0034 <national part> = <institution prefix><endpoint number>[<sufix>] <endpoint number> = nnnn

7 Jose María Fontanillo Muñiz – CERN 2004 GDS-Prefixes PrefixInstitution 1000RedIRIS 1001UC3M 1002UIB 1003CESGA 1004UM 1005UPC 1006XTEC 1007IFAE 1008ESADE...

8 Jose María Fontanillo Muñiz – CERN 2004 GDS-Our Implementation Cisco 2600 router with the MCM extension of IOS as national gatekeeper Gnugk ( as gatekeeper for our endpointswww.gnugk.org

9 Jose María Fontanillo Muñiz – 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 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