Clearwire had initially hoped to raise as much as $400m in a forthcoming initial public offering, but pulled those plans without giving a reason.

The company, which was founded by cellular pioneer Craig McCaw, announced that $600m of its whopping round of VC was from Intel Capital, the investment arm of Intel Corp.

Clearwire did not, however, disclose the selling price of its NextNet Wireless Inc subsidiary, which develops modems, base stations and other equipment, to Motorola.

Collaborating with Intel and Motorola significantly advances our vision for fixed, portable and mobile wireless broadband services, said McCaw, Clearwire co-CEO, in a statement.

Wireless broadband networks will enable the creation and delivery of differentiated services and applications that enhance the way people communicate and experience the Internet.

Kirkland, Washington-based Clearwire’s orthogonal frequency division multiplex, OFDM, technology provides performance comparable to that expected from WiMax.

NextNet’s so-called pre-WiMax technology is used in at least 30 countries. Notably, the technology drives the nationwide networks of two of Canada’s largest carriers, Bell Canada and Rogers Communications.

Once the NextNet deal closes, Motorola said it would supply equipment for existing and future Clearwire networks.

And Intel said it would include WiMax chipsets in forthcoming mobile platforms to help spur the technology.

All three companies would contribute significant R&D resources to develop NextNet’s pre-WiMax technologies, Clearwire said.

Clearwire co-CEO Ben Wolff said that working with Intel and Motorola would give Clearwire the benefit of a standards-based platform.

Clearwire initially filed for an IPO on May 11. At the time, it said it would use the proceeds for network and market expansion, as well as working capital.

While Clearwire offered no explanation in its filing with US regulators on why it pulled its offering, the dismal IPO performance of the largest US pure-play VoIP provider Vonage Holdings Corp would likely not have been encouraging.

Vonage saw its shares dive 13% in its first day of trading in May and has since lost more than 50% of its value.