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The prodigal son hesitantly calls his father from a phone booth in the rain. He wants to come home. Ecstatic Dad rings up his other son to pass on the good news. But Son No. 2 isn't too happy and calls up Mom to gripe. Mom suggests, "Call him." What's going on? Will the next phone call explain the family feud?

Watch out, Dallas and Dynasty. Repeating a formula it originated last fall, New England Telephone last week launched two drama-packed TV advertising mini- series that could almost pass for prime-time soaps. Last year similar ads sparked a furor. Their novelty attracted attention and a faithful following. But Adweek magazine columnist John Carroll charged they were "overwrought" and handed them the publication's Badvertising Award. Besides, if viewers must cling to the edge of their seats awaiting the next installment, when will they find time to raid the refrigerator?