[allyant]

Do not do this - I believe it may even be illegal in the UK without per-arranging.

In the UK you need to email BT (who operate the emergency system) and arrange a window to place a series of test calls to both 999 and 112. They will give you a time, a date and a script to exactly follow. If you pre-schedule with them it's supported.

Their email is [e-mail]

Not sure if US have a system like it.