Motorola Inc. took another step toward its roughly $300 million purchase of RiverDelta networks with an outline of the stock transaction should the merger close on Oct. 12.

Motorola announced the merger in July noting that its Motorola Broadband Communications Sector wanted RiverDelta's routing technology, spokeswoman Jeanne Russo said then. "It's a nice addition to our CMTS platform."

RiverDelta's products include the BSR 64000 broadband services router for large-scale deployment of DOCSIS 1.1. The acquisition will let Motorola offer high-density solutions combining high-availability, integrated routing and per-flow QoS, as well as modular configurations for small/distributed networks, Motorola said.

In a filing yesterday, Motorola says RiverDelta stockholders will receive $300 million, subject to such adjustments as a deduction for RiverDelta's present $27 million debt. The company warns that could run as high as $45 million, plus interest.

Motorola says holders of Series B preferred stock will receive the first $62.7 million, with the rest paid to holders of RiverDelta Series A preferred stock and common stock. Holders of Series A preferred stock will receive the same amount they would if they'd converted to common stock, the company says.

Also under the deal, 10 percent of Motorola's common stock will go into an escrow account to compensate Motorola for purchase price reductions or other issues.

Russo had no comment on yesterday's filing. "We are waiting until the acquisition closes to provide detailed updates," she says.