Polycom Video Test Numbers:

http://www.videocentric.co.uk/support/test-dial.shtml

Other video test numbers:
http://www.google.com/search?hl=en&q=video+test+numbers

 

TANDBERG Test numbers: - updating needed

LifeSize Test Numbers: - updating needed

Please note: The video loop-back services are intended as a connectivity test and confirmation that your system is transmitting video and audio. You will experience delay and noise in the picture. The artifacts are caused by the looping-server and not representative of the quality experienced in a normal video conference.

The test numbers and online services are available 24 hours per day, 7 days a week unless otherwise stated. Please keep the connection as short as possible

. . . but they are often very busy and they are subject to change without notice.