How do you set up voicemail for Cingular Samsung phone?

I don’t know the model number or anything. It’s a new camera buzz. There doesn’t seem to be a clear setting for voicemail and what I can find questions for some address or something.
When I dial what seems to be the voicemail number it questions me to enter the center address. What does that mean? I had the same number before with another carrier, could this be the problem?

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