I'm trying to use the flash for 3way calling via provider. Flash, get 2nd dial tone, make call, flash again,hang up, both outside parties are connected. Works with test set direct on the co.I have tried to set the flash timer (413) to everything from 100ms all the way to the high end of 1200. when I hit flash I can hear stutter on line then goes back to original call.
Funny thing is when I hit the flash button about 3 or 4 times in a row real fast I'm getting my 2nd dial tone. Another strange thing is when I use flash (just hitting the flash button once) on a call I originate it works every time. Only when I try to flash a call I have received I have trouble. Could there be a difference in the way the co is treating outbound calls verses incoming?