NEW YORK (Reuters) - DISH Network Corp
AT&T and DISH have had a joint marketing agreement since July 2003 to sell the "triple-play" package in AT&T regions.
AT&T said it provided the required six-month notification for non-renewal of its current contract with DISH. "We continue to discuss options with DISH," it said in a statement.
DISH shares fell by 6 percent on the news in after-market trading.
In early April, AT&T said it had expanded its partnership with DISH in territory previously covered by BellSouth Corp, which AT&T acquired in late 2006, and had stopped marketing a similar package with DIRECTV Group Inc
That move prompted speculation that AT&T had entirely dropped DIRECTV in favor of a DISH partnership. But AT&T has repeatedly said it was still talking to both about a long-term partnership for bundled phone, Internet and video services, and that a final decision was due by the end of the year.
AT&T appears ready to set up a bidding war between DISH and DIRECTV to offer video services with its lucrative "triple play" joint marketing contract.
Video partnerships are crucial for AT&T as it competes with cable service providers. AT&T is developing its own high-speed Internet and video service called U-Verse, but its expansion is taking years and analysts say joint services with satellite are key to retaining customers.
AT&T spokesman Michael Coe said: "This is procedural. This is routine."
A DISH spokeswoman declined to comment.
(Reporting by Yinka Adegoke, Kenneth Li and Ritsuko Ando; editing by Jeffrey Benkoe and Braden Reddall)