Due to how call waiting is currently implemented in our network it isn't possible to provide a * code to turn it off/on per call. We're aware of this limitation but don't have immediately plans to address it, however, a software update from our vendor may have made it possible for us to do so in the future.
Actually, several features can currently be enabled/disabled using a star code. See this FAQ: https://wiki.sonic.net/wiki/Fusion_Voic ... ll_Waiting
Still would be super nice to have it for call-waiting for all the good reasons previously stated. Any update on when or if this can be expected in the future?