I had to test some videoconfrencing equipment the other day and found the Polycom test number to be very useful.
http://www.polycom.com/resource_cent...w-3534,FF.html US, Asia Pacific, and European numbers available.
Australia
• System Type: iPower 680
• Capabilities: up to 128K
• Test Number: 61-2-9978-8054
• System Type: iPower 970
• Capabilities: up to 512K
• Test Number: 61-2-9978-8088
• System Type: 550
• Capabilities: up to 384K
• Test Number: 61-2-9978-8060