NEW YORK (Standard&Poor's) Nov. 15, 2013—Standard&Poor's Ratings Services today assigned its 'A-' issue-level rating to AT&T Inc.'s proposed C$1 billion senior notes due 2020. Net proceeds will be used to tender for certain debt securities issued by AT&T or its subsidiaries. The 'A-' long-term corporate credit rating and 'A-2' short-term rating on AT&T remain unchanged, as does the stable outlook, since we do not expect the transaction to affect key credit measures. The ratings on Dallas-based diversified telecom provider AT&T continue to reflect an overall "strong" business risk profile, bolstered by its wireless business, and a financial risk profile that Standard&Poor's considers "intermediate". Our financial risk assessment is based on the company's substantial free