Category: network

CISCO CFP-100G-LR4

Cisco CFP-100G-LR4

The Cisco CFP-100G-LR4 is a 100 gigabit single mode fiber Ethernet adapter which is used with their 9500 series enterprise switches. These adapters usually cost around $5000 each and usually have a lifetime warranty. Optical fiber uses 2 connection, TX and RX to simplify designs. Most fiber based  hardware uses extremely powerful lasers to overcome the …

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HITRON CGNM-2250

HITRON CGNM-2250

The Hitron CGNM-2250 is a residential gateway model designed for use with cable TV networks, Two USB 2.0 host, supporting Network Attached Storage (NAS) functionality Supports 32 SSIDs (16 SSIDs per radio) IPv6 Support 802.11 a/b/g/n/ac 20/40/80 MHz channels The CGNM-2250 delivers speeds of up to 960 Mbps with twenty-four bonded downstream channels over its …

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802.11AF

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802.11af is beside developed to use the unused television channels in urban ares. These range from 54 MHz to 790 MHz. The standard employs cognitive-radio technology and geolocation database access to ensure that there’s no interference to local TV signals or other services operating in this region.  The base station queries a database to see what …

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802.11AC

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The specification has multi-station throughput of at least 1 gigabit per second and single-link throughput of at least 500 megabits per second (500 Mbit/s). This is accomplished by extending the air-interface concepts embraced by 802.11n: wider RF bandwidth (up to 160 MHz), more MIMO spatial streams (up to eight), downlink multi-user MIMO (up to four …

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INTEL CENTRINO WIRELESS-N 1000

intel wi-fi link 5100 112bnhmw

The Intel Centrino Wireless-n 1000 is a half length mini PCI Express network adapter. This adapter is sold widely to the mobile machine market. Model 112BNHMW 802.11bgn PCI Express interface 1T2R 2.4 GHz 300 Mbps maximum no bluetooth Windows XP and above are supported The 112BNHMW is a standard n300 card that is used in Lenovo, …

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802.11U

802.11u

802.11u is an extension to the Ethernet standard to make it easier for mobile devices to connect to Wi-Fi services. Generally the street calls this Hotspot 2.0. The main idea is to help provide more cellular offloading. Generally 802.11u assumes that the user already has an existing internet arrangement. As an example the local cable …

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IT’S TIME TO ABANDON 2.4GHZ

The 2.4 GHz band with the introduction of 802.11n has been so overwhelmed that it is almost completely unusable. The wider 20Mhz channels simply overwhelm the channels originally designed for 802.11b and 802.11g. Notice how overlap from adjacent channels makes such a mess of the signals, Given the interference that 802.11n provides, it’s clear that …

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CISCO DPC3825

The Cisco DPC3825 is a cable modem featuring an 802.11n access point. The product is actually made by Scientific Atlanta but private labeled for Cisco. The Cisco DPC3825 wireless speed is adequate for the gigabit LAN speed. The use of an intranet works properly as well. The upstream port is a standard F type connector …

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WIFI 5GHZ CHANNELS

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CHANNEL BASE FREQ WIDTH 38 5190 5170–5210 40 40 5200 5190–5210 20 42 5210 5170–5250 80 44 5220 5210–5230 20 46 5230 5210–5250 40 48 5240 5230–5250 20 50 5250 5170–5330 160 52 5260 5250–5270 20 54 5270 5250–5290 40 56 5280 5270–5290 20 58 5290 5250–5330 80 60 5300 5290–5310 20 62 5310 5290–5330 …

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802.11N

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802.11n is an amendment to the IEEE 802.11-2007 wireless-networking standard. Its purpose is to improve network throughput over the two previous standards—802.11a and 802.11g—with a significant increase in the maximum net data rate from 54 Mbit/s to 600 Mbit/s (slightly higher gross bit rate including for example error-correction codes, and slightly lower maximum throughput) with …

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