I have found that I save a lot of hassle, time, and frustration by saving conference call numbers in my phone ahead of time. It works like this:
1. Create a new contact. Add the bridge/dial in number.
2. Press the symbol button in the lower left-hand corner. Add either a pause, which displays as a comma, or wait, which displays as a semicolon. According to this blog, a pause stops the dialing for 2 seconds, and the wait does not proceed until you enter more numbers. They both seem to work, but I use pause.
That's it! I have saved a contact for my conference call number as chairperson, attendee. I have saved dozens of other contacts for anyone I regularly chat with on conference calls.
Now for some fun. Here are my two favorite comedy bits on conference calls: David Grady's the conference call and If a conference call happened in real life. Enjoy!