Tata Teleservices Limited (TTSL) and the SREI Group are reportedly negotiating with private equity players to sell stake in their joint venture, Viom Networks.

Over the past month, the Tata Group and the SREI Group have held talks with two possible investors, the Sumitomo Corporation of Japan and private equity company TPG Partners.

It is believed that though Viom is managed by the SREI Group, the Tata Group plans to regain management control of the company in 2012 if Viom is unable to list on the stock exchanges by then.