Openreach has called for broadband providers to devise a formal structure for sharing information.
According to BT's infrastructure division, the coalition would enable the likes of Sky and Vodafone to present a case for investing heavily in new ultrafast broadband deployments.
The move could also smooth relations between Openreach and BT's competitors in the broadband sector, many of whom have expressed concerns about the infrastructure division's governance and independence in the past.
This contributed to BT recently agreeing to Ofcom's demand for Openreach to become a distinct and legally separate company.
The regulator had sought changes to Openreach's governance as it was concerned BT still had control over its decisions, while other telecoms firms were not adequately consulted on investment plans that would affect them.
Openreach will therefore be separated from BT and operate with its own staff, management, strategy and a legal purpose to serve all of its customers equally.
The Telegraph understands that Openreach has called in Stuart McIntosh, the one-time competition director at Ofcom, to take the lead on designing a consultation process on a possible coalition.
Mark Shurmer, Head of Regulation at Openreach, commented: "We’re keen to work more closely with our customers on how we can collectively deliver better service, enhance investment in the network and how we can better meet their customers’ needs in future.
"We can now get on with that –-and some of the commitments we made were about engaging in a different, more collaborative and consultative way with our customers."