TORONTO - Rogers Communications announced Friday it has filed a preliminary short form base shelf prospectus with applicable securities regulators in each of the provinces of Canada which will allow the company to make offerings of debt securities of up to $4 billion during the 25-month period after the shelf prospectus becomes final.“Rogers also announced it has filed a separate preliminary short form base shelf prospectus with the Ontario Securities Commission and a corresponding registration statement with the United States Securities and Exchange Commission. These filings will allow Rogers to make offerings of debt securities of up to US$4 billion...