Halftones and resolution settings - why and reasons?

I am taking continuous tone images, color and B&W, converting to greyscale then halftone dots so that the images will print better via desktop laser printer of some dpi value output.
Photoshop applies a Bitmap resolution, then asks for and 'Output' resolution.
The dot style menu then asks for a dot resolution value.
I understand that the smaller dpi produces a more contrasty, newspaper type image. Conversley, a higher dpi will allow for a better gradation of tonality, but may block up depending on the reproduction method.
Do these two resolution values correlate?
Are you resampling the Bitmap resolution when you input a different value?
Will a higher Bitmap resolution provide greater tonal range if using a higher dpi?
Since the printer output will define how well a particular dot will be built up during printing, is there a relationship or method for entering dpi values that will provide a good output?
Thanks, Leadmann12

Can't you control DPI and LPI in the printer settings without destroying the image in Photoshop? You are making Photoshop do something it should not need to do.
The difference that you observe in newspaper images relates to lower LPI, not necessarily a change in DPI.
http://en.wikipedia.org/wiki/Lines_per_inch

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