Here is a list of test phone numbers that you can call to test your PBX system. When you call you can press 1 to hear the caller ID that is being presented.
| Country | Number |
| Australia | +61 2 9192 0995 |
| United States of America (USA) | +1 628 246 2222 +1 213 621 0002 (miliwatt test tone) +1 202 762 1401 (speaking clock) |
| New Zealand | +64 9 887 6986 |
| United Kingdom (UK) | +44 20 8759 9036 |