1 / 20

Video Conferencing

Video Conferencing. Global Dialing Scheme (GDS). Zeeshan Aamir. What is video-conferencing?. Transmission of image and speech back and forth between two or more separate locations. Similar to making a phone call An opportunity to talk to and see others in real time. Zeeshan Aamir.

candice-hebert
Download Presentation

Video Conferencing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Video Conferencing Global Dialing Scheme (GDS) Zeeshan Aamir

  2. What is video-conferencing? • Transmission of image and speech back and forth between two or more separate locations. • Similar to making a phone call • An opportunity to talk to and see others in real time Zeeshan Aamir

  3. What are the benefits of video-conferencing? • The visual interaction can enhance communication • Increases connections with the world • It can save time and other valuable resources • It can heighten motivation Zeeshan Aamir

  4. How is video-conferencing being used? • Meetings • Education • Telemedicine • Courts and judicial system • Telecommuting • Security Zeeshan Aamir

  5. What is a gatekeeper? • Physically it is a server that can be located anywhere on the network • Functionally very similar to a DNS server that does Address lookup • Adds some control functionality • Creates an “H.323 zone”

  6. H.323 Zone Definition • A single gatekeeper and all of the end points (clients, MCUs, and gateways) that register with the gatekeeper. • Typically is a community • E.g. University or organization Zeeshan Aamir

  7. GatekeepersProvide: • Admission Control • Call Authorization • Address Translations • Bandwidth Management • Zone Management • Call Signal Routing • Management Functions Zeeshan Aamir

  8. Basic Operation • Endpoints register with gatekeeper -This is a one time administrative task • Endpoint asks gatekeeper for permission to place call to another endpoint • Endpoint signals call with other endpoint • Endpoints exchange media directly • Endpoints disconnect, notify gatekeeper Zeeshan Aamir

  9. Technical description • Uses TCP port 1720, UDP Port 1719, 1718 • 1720 for Q.931 call control • 1719 H.225 Registration, Admission, and Status messages (RAS) • 1718 GK discovery • Deals with H.225, H.245, Q.931 • H.225: RAS as above but also call control and call setup messages • H.245: Media control and Transport signaling Zeeshan Aamir

  10. GatekeeperFunctionality • Services: • Gives access to multipoint conferences and gateways • Neighbor Gatekeepers: • Provides inter-zone communication • Network Topology: • Allow administrator to employ traffic shaping Zeeshan Aamir

  11. Internet2 Commons specific settings • Adopted GDS • Only need two neighbors • North American Root main: 192.148.244.130 • GDS serves as Dial Plan • Open registration mode • “Direct” routing mode • Services are 001189 + XXX + YYYY • XXX digits to identify MCU and conference • YYYY digits for a specific users conference • Have not adopted LDAP or H.350 • Currently is a Radvision ECS • 500 concurrent calls, 3000 concurrent registrations Zeeshan Aamir

  12. Global Dialing Scheme (GDS) • A structure for peering between gatekeepers, such that any endpoint associated with a ViDeNet zone may dial an endpoint in any other ViDeNet zone • ViDeNet Version 3 Dial Plan • A numbering plan for global video and voice over IP • Video Development Initiative (ViDe) • Founded by representatives from universities and education networks Zeeshan Aamir

  13. Four parts of a GDS Number • International Access Code (IAC) always 00 • A Country Code (CC) • Follows the ITU international access code system • An Organizational Prefix (OP) • In North America, ViDeNet lets you chose between E164 space and Super Space (more later) • Some countries use area code/exchange prefix • An Endpoint Number (EN) • A unique number assigned to each endpoint following organization practices • GDS numbers are dialed: IAC CC OP EN (without the spaces) Zeeshan Aamir

  14. Benefits of GDS • Provides a static address in a dynamic world • If you have a DHCP IP address, your GDS number can stay the same • If you travel, your GDS number can travel with you • All Internet2 Commons Conferences have GDS Dial Strings Zeeshan Aamir

  15. Making a GDS Call Zeeshan Aamir

  16. Gatekeepers Available on the Market • Standalone Gatekeeper • (e.g., RADVISION ECS) • System Blade • (e.g., RADVISION ECS on a blade of a ViaIP) • Embedded in an Endpoint • (e.g., A gatekeeper embedded in a RADVISION OnLAN MCU or gateway) • Backup Gatekeeper • (e.g., RADVISION Alternate Gatekeeper) • Other Gatekeepers: • Polycom PathNavigator • Tandberg Gatekeeper • GNU Gatekeeper (Based on Open323) • Cisco (RADVISION code running on Cisco IOS) • VCON Media Exchange Manager, MXM Zeeshan Aamir

  17. Registering with a Gatekeeper • Register with a GDS Gatekeeper, if you need to borrow space go here: http://commons.internet2.edu/reggate • Make sure you are connecting at 384 kbps • Dial 001189 700 1234 (no spaces) • Call 614-292-xxxx for technical support • Many new users have never done this • Typically an administrative chore and requires administrative access to the endpoint’s settings • This does take a few minutes and can require some rebooting, so be prepared • If your campus is already GDS, make a note of that on the cheat sheet in VC room Zeeshan Aamir

  18. How to register with the Commons Gatekeeper • In your videoconferencing endpoint unit, navigate to the H.323 settings menu • Enter your email address as your endpoint’s H.323 Name • This gives administrators some idea of who is registering and from where • Assign yourself an E.164 number in this format • 001189 + your 10 digit phone number • If your phone number is (111) 555-0000, your GDS number would be 0011891115550000 • Your endpoint's system may need to be rebooted. • Navigate back to the H.323/Gatekeeper setting • Enter the following IP address: 192.148.244.115 • Again, your endpoint may need to be rebooted • Congratulations! You should now be registered with the Internet2 Commons Gatekeeper Zeeshan Aamir

  19. Global Dialing Scheme The Global Dialing Scheme (GDS) provides a structure for peering between gatekeepers, such that any endpoint associated with a ViDeNet zone may dial an endpoint in any other ViDeNet zone. http://commons.internet2.edu/sitecoordinators.html http://commons.internet2.edu/reggate http://commons.internet2.edu/gds.html See www.vide.net Zeeshan Aamir

  20. Special Thanks Some information on the slides used from the presentation of Megan Troyer Technology Coordinator The Ohio State University Site Coordinator Training:VC by VC Zeeshan Aamir

More Related