Appendix 8: CU-SeeMe & Reflector

1. What's CU-SeeMe and Reflector?
  • CU-SeeMe S/W : 1-to-1 A/V Conference tool for Windows/Mac on TCP/IP stack
  • Reflector S/W : Enable 1-to-many/many-to-many conference using CU-SeeMe 

2. Communication

  • 1-to-1 : Direct communication by specifying IP address
CU-SeeMe 'A' ---------------------CU-SeeMe 'B'
   (Direct communication) 
  • 1-to-many, many-to-many : through Reflector.

For example, if there are 4 participants in conference room, 

CU-SeeMe 'A'          CU-SeeMe 'C'
          \            /
           \          /
             Reflector
           /           \
          /             \
CU-SeeMe 'B'            CU-SeeMe 'D'

3. MBone과의 연동 

  • Reflector를 통한 Multicast packet 중계
MBone--------- Reflector-------- CU-SeeMe
(Multicast Packet)     (Unicast Packet) 
  • Reflector 실행 system : UNIX, Windows NT/95

multicast capability 필요

  • Reflector parameters : NV-MC-OUT, NV-MC-IN, VAT-MC-IN, VAT-MC-OUT
  • Reflector configuration example

NV-MC-PORT 4444

NV-MC-IN 224.0.172.41

NV-MC-OUT 1 224.0.172.41

VAT-MC-PORT 3333

VAT-MC-IN 224.0.172.41

VAT-MC-OUT 1 224.0.172.41

VAT-CONF-ID 0

4. Reflector간의 연동

  • Unicast/Multicast/Broadcast
  • Reflector parameters : ADMIT-BCC-CLIENT, ADMIT-GENERAL-BCC,

OBTAIN-BCC, OBTAIN-GENERAL-BCC, MC-OUT,

MC-IN, UNICAST-REF, MC-GROUP

  • Reflector configuration example

ADMIT-BCC-CLIENT 163.239.130.60 /* Primary Reflector */

OBTAIN-BCC 143.248.195.20 /* Secondary Reflector */


5. Software

  • CU-SeeMe(Free) ftp://mice.ed.ac.uk/pub/videoconference/CU-SeeMe

ftp://cosmos.kaist.ac.kr/videoconference/CU-SeeMe 

  • Enhanced CU-SeeMe http//:www.wpine.com/cu-seeme.html

- Commercial product (2.01) for Windows : $69

- Beta test version (2.0b2)for Mac : 30day demo 

  • Reflector demo version http://www.wpine.com/cu-seeme.html(need serial No.)

Reflector free version ftp://mice.ed.ac.uk/pub/videoconference/CU-SeeMe

ftp://cosmos.kaist.ac.kr/videoconference/CU-SeeMe

6. System Requirement (Enhanced CU-SeeMe)

  • Windows

- H/W, S/W requirement :

486 processor with 66MHZ clock

10 MB hard disk

8 MB RAM

Windows 3.1, 3.11, Windows NT or Windows 95

TCP/IP (Winsock compliant)

- Connection Requirement :

14.4K modem for audio

28.8K modem for video and audio

PPP

Ethernet or ISDN

- Audio/Video Requirement :

To Send Video : Digital camera

Video Digitizer ( not required for

Connectix QuickCam Cameras )

To Send Audio : Microphone

Sound board and drivers

To Receive Audio : Sound board and drivers

Speakers or headset 

# More information is at http://goliath.wpine.com/sysreq.htm

  • Mac

- H/W, S/W requirement :

68020 processor with 25MHZ clock or better

10 MB hard disk

5 MB RAM mininum

System 7.0 or greater

TCP/IP (MacTCP or Open Transport)

- Connection Requirement :

14.4K modem for audio

28.8K modem for video and audio

PPP

Ethernet or ISDN

- Audio/Video Requirement :

To Send Video : Digital camera

Video Digitizer ( not required for

Macintosh AV models or

Connectix QuickCam Cameras )

To Send Audio : Microphone ( built in some Macintosh )

To Receive Audio : Speakers or headset ( built in some Macintosh) 


7. Tip

  • Reflector S/W for Solaris is too buggy, especially in multicast Audio

conference using VAT.

WhitePine Reflector V2.0.1 for SunOS4.1.X, Linux, FreeBSD work well.

  • When you use NV program and participate in CU-SeeMe conference,

make sure NV video stream is encoded as 'CU-SeeMe'.

Otherwise, number of participants will increase abnormally. 

  • VAT <--> CU-SeeMe audio conference works only if encoding schemes are

"Intel DVI(CU-SeeMe)" and "DVI,DVI2 or DVI4(VAT)". 

  • In Reflector configuration, VAT-MC-OUT & VAT-MC-IN should be identical.
  • When we use BCC option, Secondary Reflector can't recognize multicasting

VAT client of Primary Reflector. 

8. References

  • CU-SeeMe WELCOME PAGE, available from <http://cu-seeme.cornell.edu>
  • Enhanced CU-SeeMe USER GUIDE for Mac users, available from

<ftp://ftp.wpine.com/pub/product/demo/cuseeme/cuseeme-pdf.sea.hqx>

  • Enhanced CU-SeeMe USER GUIDE for Windows users, available from

<ftp://ftp.wpine.com/pub/product/demo/cudeene.cu201pdf.exe>

  • WhitePine Reflector Conference Administrator User Guide Version 2.0,

available from <ftp://ftp.wpine.com/pub/product/demo/reflector/

  • White Pine home page, available from <http://www.wpine.com>