Here is the procedure (the * is part of the entry).
1. Call the Local Toll Free Number.
2. Enter the Meeting Number which is the SIN phone number without the country code. So *6879 9118* for APC and *64180670* for everyone else.
3. The PIN codes for the moderators are as before *1999* and *3133* respectively.
4. Make sure you hang up when you are finished.