Make sure it actually works at the line. Pick up a cheap single line phone with a flash button and make sure you can activate the feature at the demarc. If you cannot, then it must be a SP issue.

If you can then this would point to a timing issue in your equipment. You might have to adjust the flash timer a little bit to get this to work consistently.

If it used to work and then just quit (assuming no relocation or other major change has occurred), my guess would be SP.


Michael Meyer