To get some indication of the relative demands of voice and data traffic, consider the following:

a. Calculate the number of bits used to send a 3-minute telephone call using standard PCM.

b. How many pages of IRA text with an average of 65 characters a line and 55 lines a page corresponds to one 3-minute telephone call?

c. How many pages of facsimile at standard resolution, that is, 200 dpi (dots per inch) horizontally and 100 dpi vertically, correspond to one 3-minute phone call?

Assume that the effective page is 8 inches wide and 10.5 inches long. Moreover, assume an effective compression ratio of 10 to 1.