American Telephone & Telegraph Co. Chairman John D. deButts said today he sees no recession through 1980.

And his company reported continued growth in profitability during the quarter ended Nov. 30, despite setting aside a substantial sum to reflect possible adverse tax consequences and customer refuneds in a controversial California case.

In an interview, deButts also revealed that AT&T is conducting negotiations with the Soviet Union on construction of two major manufacturing facilities in that Communist nation.

With telephone messages running last month at an annual rate of 15,2 billion-the highest in Bell

"While greater oil prices will have an impact, it won't be so great as was indicated by the reaction of the marketplace" earlier this week, he said, referring to the decision of oil-producting nations to boost oil prices next year by 14.5 percent.

He cited strength in housing, retailing, inventories and industrial production as evidence that the economy remains unusually strong. And AT&T's own economic forecasts are much more optimistic than the consensus of business and private forecasters.

Kenneth Militzer, economist for AT&T, is projecting a real grwoth in gross national product of 3.3 percent (compared with the consensus of 2.3 percent) and average unemployment of 6 percent (vs. the consensus 61/2 percent.)

AT&T's earning help explain the relative optimism at the Bell System headquarters here. In the recent three months, profits were $1.36 billion ($1.97 a share) compared with $1.15 billion ($1.74) in the smae quarter of 1977. Revenues soared to $10.6 billion from $9.4 billion.

For the 12-monh period ended Nov. 30, the nation's largest business enterprise (in terms of assets, employes and investment) earned $5.24 billion $7.71 a share) compared with $14.4 billion ($6.78) and revenues gained to $40.7 billion from $36 billion.

As impressive as these figures are, they mask an actual decline in quarterly earnings per share when compared with two prior periods in 1978-the result of a decision to set aside funds for the california case, involving Pacific Telephone & Telegraph Co., an AT&T subsidiary.

The cumulative effect was to lower AT&T profits by $71 million for the latest 12-month period, by $62 million for the prior 12 months and by $80 million for the period of 1974 through Nov. 30, 1976.

California's Public Utility Commission has ordered Pacific Telephone to lower rates and make refunds, after finding that the customers and not the firm should benefit from income tax benefits of accelerated depreciation and the federal investment tax credit-benefits that apply to utitlities elsewhere. The Supreme Court has declined to review the California action and AT&T today set aside the funds to comply, although resolution of the conflict could take years.

DeButts called the California situation "a revolting development," and said the Internal Revenue Service now is auditing AT&T accounts for 1974 nd vowed to go the U.S. tax court with an appeal if the IRS finds that Pacific Telephone is ineligible for the federal tax benefits under the California decision.

In a related development, the General Services Administration today asked the Federal Communications Commission to investigate AT&T's earnings. GSA Administrator Jay Solomon said his agency believes the giant communications company is earning more than the 9.5 to 10 percent return limit on its rate base.

Solomon said AT&T's authorized rate of return should be reduced to 9 percent.

AT&T reported today that its earnings in the last 12 months ending Nov. 30 resulted in a 9.65 percent return on total capital investments fo $82 billion.

The AT&T chairman, who will retire on Jan. 31, also said in company will spend a record $14.8 billion next year to modernize its facilities, an increase of $1.2 billion from 1978. He cautioned that AT&T may not experience the same rate of growth in demand for communications services next year as today but forecast improved earnings for all lf 1979.

Russian leaders, he said, have approached AT&T about building plants to manufacture telephone equipment and the American firm now is seeking approval from the Carter administration to make an agreement. Clearance is required for the deal because it involves a sale of tecrnology, but deButts emphasized that "we are not offering anything not available elsewhere."

DeButts had no estimate for the cost of the venture but said the Soviet Union would put up the money while the U.S. company would build the plant, design equipment and train Russian workers.