Custom Dialplan for Dynamic VM Blast

A recent forum post from forum newbie @mattch asked an interesting question, how do you go about creating a VM Blast group where the group membership is not predetermined by the Admin in advance. I’ve cobbled together this dialplan which is working but would definitely benefit from some actual testing and review.

There are two components, a feature code prefix and the dyn vm blast destination. The feature code prefix allows any local 4 digit extension to dial **55<ext#> to add the extension to the dynamic VM group. A hint is also generated so it can be used with a BLF button. Dialing again removes from the group. The destination pulls all the toggled extensions from the astdb and sends them to a VM blast group.