Days after Airespace’s acquisition had been completed at the end of March, painters shellacked a thick white layer over the company’s sign in its former headquarters in San Jose, California.

Stuck in the front lawn of the Wi-Fi switch maker’s old offices, a newly minted sign displays Cisco’s bright red logo, establishing the network giant’s recent takeover of the startup’s old digs.

And thus continues the Cisco acquisition machine, which is famous in the industry for the rate at which it swallows companies whole. Last year Cisco, which saw annual sales of $22 billion, bought a dozen startups to add to its portfolio.

But the $450-million Airespace purchase was no tiny morsel. The deal is so far the year’s largest venture-backed acquisition in the communications space, according to VentureOne, and the third-largest startup exit across all venture-backed industries this year. The company beat out rivals in an industry that grew increasingly competitive as business-based Wi-Fi networks became a must-have technology.

Now that Airespace investors are counting their cash and former employees will soon begin commuting to the 300-acre Cisco Campus, also in San Jose, the startup’s life offers lessons on how to build a company in a post-bubble era, while keeping an industry giant in its cross-hairs.

The Exit

When the Cisco offer finally came, no one had more to gain than the company’s original founder Tae Hea Nahm, also a general partner at Storm Ventures. Mr. Nahm’s investment brought Storm more than $100 million in returns—more than 200 times the $500,000 Series A investment, and the firm’s biggest return to date.

Sitting in Storm’s plush office space perched among the venture firms of Sand Hill Road in Menlo Park, California, Mr. Nahm describes how he formed the company to survive the scarcity of the bust days.

Spending roughly 50 hours per week for over a year as Airespace’s interim CEO, along with managing his firm’s many other—and substantially larger—investments, Mr. Nahm carefully incubated the company. “Form the idea, build the team, create a business plan,” he says. “Spending so much time on a venture creates a strong emotional attachment.”

It’s also the personal connection that causes Mr. Nahm to call the company’s Cisco fate “bittersweet.” Matthew Howard, partner with Norwest Ventures, which gave Airespace $14.5 million, says, “I imagine it will be a similar feeling when my daughter moves out of the house.”

And those are just the investors talking. Former CEO Brett Galloway is now vice president of Cisco’s wireless division, but admits the Cisco acquisition took some emotional wrestling. “We were very focused on making this a great company and it is hard to let go of that dream.”

The Reality

Airespace’s investors and employees can afford to get nostalgic now that the deal is done. The emotions were likely of a different sort during Silicon Valley’s nuclear winter of 2001. That year M&A deals amounted to only $22 billion, compared to the previous year’s $98 billion.

With only half a million in seed funding, Mr. Nahm had to keep the startup small, hiring only eight employees and keeping costs low.

But working with scarcity proved crucial to the company’s success. Having few employees kept the startup small and nimble and enabled it to change gears at a moment’s notice. When the company incorporated in July 2001, the plan was to create a dual cellular and 802.11 infrastructure, and sell the offering under the name Black Storm.

The moniker lasted as long as the technology. After an embarrassing presentation to a prominent venture capitalist who declared the company’s technology unworkable, Mr. Nahm brought his crew back to the drawing board. “That was a low moment,” he recalls.

Torn by members of the firm who thought Storm should cut its losses, Mr. Nahm decided on a last-ditch effort that would hopefully put the team on the right track.

Technology Wager

Over the 2001 holiday season, the team hunkered down in a conference room to determine the company’s final architecture. In what Mr. Nahm calls the “burn-in process,” the eight members lived off pizza delivery for weeks at a time, debating technical choices and finally reaching a crossroads.

Four members of the team, who came to the startup from the wireless industry, wanted a stand-alone wireless platform. The other four, drawn from the cellular industry, wanted to maintain the dual cellular/Wi-Fi plan.

Betting on the technology he already used in his home, Mr. Nahm went with Wi-Fi. Today it stands as a clearly smart gamble, but at the time the choice wasn’t so obvious. “There were people internally who said that if we go down the 802.11 path, we’ll be making a toy that will be crushed by Cisco,” he says.

The choice also represented the company’s strategic thinking towards Cisco even in the earliest days. All startups build their industry’s giants into the business model and Airespace was no different.

The employees and investors deny the company was built to flip to the networking giant, but as the company’s chief competition, Cisco loomed large in all aspects of the decision-making process—even if that meant lining up other big players like Alcatel and Nortel to create the anti-Cisco club.

The Winning Team

But a startup’s early days are always marked by those key decisions that will make or break the vision. After securing the technology, Mr. Nahm had to make the hard decision to send the four cellular members packing—a choice he called “very emotionally difficult.”

After hiring roughly 20 employees, the next crucial step was to find the CEO replacement for Mr. Nahm, who had been acting as interim CEO for almost a year. The company needed someone with wireless industry experience who also had startup success. If a CEO could make the right decisions through the haze of the bubble, then the person could lead a company during the reality of the post-dot-com era.  

After a laborious search process that lasted several months, Mr. Nahm found Brett Galloway. Mr. Galloway was happily employed as CEO of Packeteer, though, and his choice was not unanimous with the team. “Hiring Brett as CEO was a controversial decision,” says Mr. Nahm.

Brett Galloway is a far cry from the flashy presence of Cisco’s John Chambers, causing Alan Cohen, Airespace’s former vice president of marketing, to call Mr. Galloway “a triumph of substance over style.” But based on Mr. Galloway’s success with steering Packeteer through the bust days, Mr. Nahm rallied hard to bring him onboard.

A Cisco Future

No one is likely arguing about Mr. Galloway’s successful steering today. When Mr. Galloway announced Airespace’s plans to be sold to Cisco, he quipped that they had wanted to build a large company and that dream had just become a reality.

For now, though, Mr. Galloway has left the world of startups for the networking industry’s equivalent of “The Man.” Mr. Cohen says that 97 percent of the staff is also following. With Airespace’s former office just miles from Cisco’s campus, the integration is likely to be relatively painless.

But John Sullivan, a professor at San FranciscoStateUniversity who researches human resources, predicts that only 40 percent of the senior leadership will remain at Cisco once their options are fully converted and exercised. Many will leave for new startups, which strangely enough will likely compete for future Cisco acquisitions.

“It’s almost a way of life in the Valley to be acquired by Cisco, leave after a year or two, and then rejoin them in a few years as part of another startup,” says Mr. Sullivan.

Now that Cisco has almost fully digested the company, and all traces of the Airespace logo are rubbed out of the former office, the acquisition machine will move on to its next target. On April 14 the company announced its intention to acquire switch-maker Topspin for $250 million.

Airespace’s $450-million deal proves that weathering the downturn with careful incubation, a competition-targeted business plan, and a few crucial decisions made at the right time can bring big returns in the days of the recovery.