An Alternative to QoS | Going Wi-Fi: A Practical Guide to Planning and Building an 802.11 Network

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TeleSym brings the advantages of Internet phone calling to mobile computers. The company's SymPhone System software enables clear, cost-effective voice communications on wireless mobile computers. The SymPhone codec uses TeleSym's patent-pending Edge Quality of Service technology, providing high quality without requiring QoS in the network. It can maintain a call, even when subjected to a 50 percent loss in data packets.

The SymPhone System extends the functions of the office phone to any location with Wi-Fi connectivity. Users can make and receive calls over the Internet from a mobile computer (laptop, tablet-PC or PDA), throughout a building or campus, at home and at a public Wi-Fi HotSpot. Wireless factory and warehouse users can also use SymPhone as an intercom or cordless phone, using the same computer they use to access their company email.

"In the course of the next year, wireless connectivity for computers will become the rule, rather than the exception," explains Raju Gulabani, TeleSym's chief executive. "At that point, it makes perfect sense to include voice calling as part of every networked device, particularly in the enterprise environment."

For mobile workers in wireless enterprises, the SymPhone System extends the functions of the office phone to a mobile computer, such as a laptop, a tablet PC or a PDA, allowing users to roam throughout the building or campus, into HotSpots or in the home, while making and receiving calls over the Internet. Wireless factory and warehouse users can also use SymPhone as an intercom or cordless phone, using the same device they use to access their company data and emails.

Breakthrough sound quality distinguishes SymPhone from other telephone systems and "soft phone" Internet calling software. In calls between SymPhone users across the open Internet, the audio fidelity is said to be "near-CD-quality," with no perceived latency (delay). Moreover, according to TeleSym, this quality is maintained even in the rugged wireless network environment.

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