A sizzle call and an info call is basically the same thing. A sizzle call can be set up with several menus' (categories) on it.
For instance: your sizzle call could say "Thank You for calling this 24 hour sizzle call. Press 1 to hear about the company, press 2 to hear about the pay plan, press 3 to hear testimonies from different people" etc.
An info line would tell your people what the schedule is for the different conference calls or anything else for that matter.
The voicemail boxes will be coming out in the near future.