NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned a rating of 'BBB' to the proposed senior unsecured 5 and 10-year issuances by Digital Delta Holdings, LLC, a subsidiary of Digital Realty Trust, Inc. (NYSE: DLR). The notes will be fully and unconditionally guaranteed by Digital Realty Trust, Inc. and Digital Realty Trust, L.P. The company expects to use to the net proceeds to fund a portion of the $1.9 billion acquisition of Telx announced in July 2015. A full list of Fitch's current rating