This is what hasn't worked so far:
Dial the first party, wait until it answers, then push Flash
Dial the second party (our faz number), wait until it answers, then push:
687 - no effect
*687 - no effect
#687 - no effect
The multi-party part of it works great. I'm able to have up to 6 (including the call originator) partys on the line. I'm just trying to figure out how to drop a party if it ends up being an aswering machine or whatever without having to end the whole call and start over.
Is there something else I should check?