A joint venture between Verizon, Comcast, and Time Warner Cable to explore the development of innovative new services delivered across cable and wireless networks has been terminated, according to Fran Shammo, Verizon’s chief financial officer.

Speaking on a quarterly results conference call, Shammo acknowledged the companies still have a cross-marketing agreement selling Verizon Wireless service to Comcast and Time Warner Cable subscribers and pitching cable service inside Verizon Wireless stores. A Verizon spokesperson admitted the parties abandoned the effort to co-develop new products and services at the end of August.

Shammo pointed to Verizon’s recent buyout of Vodafone’s share in Verizon Wireless as one of the market changes that led to dissolving the partnership with the two cable companies. Shammo indicated bringing Verizon Wireless under the full control of Verizon Communications allows the company to develop, market, and distribute its own products and services across both Verizon Wireless and fiber optic FiOS platforms.

Had the joint venture continued, Verizon’s FiOS network might have suffered a competitive disadvantage, being unable to capitalize on the exclusivity of new services developed by Verizon to better compete against the two cable companies that share many Verizon service areas.

Verizon FiOS has already garnered a 39% market share with room to grow in major cities like New York City, Philadelphia, and Washington where Verizon has not yet completed its fiber optic buildout.