Engineering for Voip with 802.11
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Technology companies have created wifi-based phone systems serving niche markets for several years. Early products were introduced with 11b-only wireless subsystems having maximum phone capacity of approximately 5 voice calls. These systems often used proprietary signaling and proprietary QoS techniques. The wireless phone links would not have been secure, and there would not have been sufficient bandwidth to service data applications and phones simultaneously by current expectations. This paper considers 802.11 (also known as wifi or wlan) MAC protocol issues where they intersect with voip protocols and handset power-save procedures.
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