MMDS (Multichannel Multipoint Distribution Services)

A point-to-multipoint microwave tech-

nology operating in five bands in the 2.15–2.68 GHz range in the United States and Canada and in the 3.5 GHz range elsewhere, MMDS was developed for television transmission. MMDS subsequently was tweaked for two-way Internet access applications but is bandwidth-limited at only 200 MHz, which does not compare favorably with most alternative access technologies. MMDS operates on the basis of a macrocell up to 31 miles (50 kilometers) miles in radius.The transmit antenna is placed on a hilltop, tall building, or other point with maximum lookdown in order to maximize line of sight (LOS).The antenna may be omnidirectional or may be sectorized in order to improve spectrum efficiency. MMDS has been rendered obsolete and incorporated into WiMAX. See also bandwidth, Internet, LOS, macrocell, microwave, point-to-multipoint, spectral efficiency, and WiMAX.

• NFPA 70
• NGI (Next Generation Internet)
• NHRP (Next Hop Resolution Protocol)
• nibble
• NIC (Network Interface Card)
• NID (Network Interface Device)
• Nigerian Connection
• Nigerian Scam
• NII (National Information Infrastructure)
• NIR (National Internet Registry (NIR)
• N-ISDN (Narrowband ISDN)
• NIST
• NIST (National Institute of Standards and Technology)
• NIU (Network Interface Unit)
• NLOS (Non-Line-Of-Sight)
• nm (nanometer)
• NMS (Network Management System)
• NMT 450 (Nordic Mobile Telephone 450 MHz)
• NMT 450 (Nordic Mobile Telephone 450 MHz)
• NMT 900 (Nordic Mobile Telephone 900 MHz)
• NMT 900 (Nordic Mobile Telephone 900 MHz)
• NMT (Nordic Mobile Telephone)
• n (nano-)
• NNI (Network-to-Network Interface)
• NN (Network Neutrality)