Why did the phone companies cling to expensive switched network standards even as packet-switched voice grew robust enough to deliver acceptable fidelity at a much lower cost per connection?

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Packet switching works for both voice and data.

FORBES: Grand illusions

The router, called ASR-1000, allows Internet service providers (ISPs), large companies and universities to move data and integrate services that enable security, voice over Internet, deep packet inspection and the authentication of broadband flow to specific subscribers, all in a single piece of hardware.

FORBES: Cisco Seeks An Edge

"Popular online applications like gaming, Voice over IP (VoIP) and HD video are some of the most sensitive to latency and packet loss over Wi-Fi connections, " said Bigfoot Networks CEO Michael Howse.

ENGADGET: Bigfoot brings Killer bandwidth management to laptops via Wireless N module