Wireless LAN Specifications

D-Link TM-G5240 WLAN 802.11g wireless router, Cisco EZXS88W Ethernet switch, MFJ-1278 multi-mode data controller.

D-Link TM-G5240 802.11g wireless router, Cisco EZXS88W 8-port Ethernet switch, and MFJ-1278 multi-mode data controller.

Wireless Local-Area Networks, known as Wireless LAN or simply WLAN technology, provide network connections over microwave links typically around 2.4 and 5 GHz. Most of what is called WLAN today is based on the IEEE 802.11 family of standards and marketed as Wi-Fi.

Another general family of wireless network technology is based on digital mobile telephony, carrying IP networking over the worldwide GSM internetwork. Look here for an example of GSM IP networking in Bulgaria, where in 2011 they had the third-fastest Internet service in the world.

WiFi and WiMax Characteristics

Standard Frequency Max data rate Spectrum sharing Modulation
802.11 (Wi-Fi) 802.11a 5.15-5.825 GHz
54 Mbps OFDM BPSK, QPSK, 16-QAM, 64-QAM
802.11b 2.4-2.5 GHz
11 Mbps DSSS CCK
802.11g 2.4-2.5 GHz
54 Mbps OFDM BPSK, QPSK, CCK
802.11n 2.4-2.5, 5.15-8.825 GHz
248 Mbps OFDM 64-QAM
802.16 (WiMAX) 802.16d Licensed: 2.5, 3.5 GHz
Unlicensed: 5.2, 5.8 GHz
70 Mbps OFDM BPSK, QPSK, 16-QAM, 64-QAM
802.16e Various: 2.3, 2.5, 3.3, 5 GHz 70 Mbps SOFDMA BPSK, QPSK, 16-QAM, 64-QAM

Digital Mobile Telephone Specifications

System Band, MHz Uplink, MHz Downlink, MHz Channel Number Regions of Use
GSM 400 450 450.4 — 457.6 460.4 — 467.6 259 — 293 Tanzania
GSM 400 480 478.8 — 486.0 488.8 — 496.0 306 — 340 Tanzania
GSM 850 850 824.0 — 849.0 869.0 — 894.0 128 — 251 USA, Canada, many other countries in the Americas.
GSM 900
(P-GSM)
900 890.0 — 915.0 935.0 — 960.0 1 — 124 Europe, Middle East, Africa, most of Asia, Brazil, Falklands, St Pierre & Miquelon, some Caribbian countries
GSM 900
(E-GSM)
900 880.0 — 915.0 925.0 — 960.0 975 — 1023
(0, 1 — 124)
Europe, Middle East, Africa, most of Asia
GSM R
(R-GSM)
900 876.0 — 915.0 921.0 — 960.0 955 — 973
(0, 1 — 124,
975 — 1023)
Europe, Middle East, Africa, most of Asia
GSM 1800
(DCS 1800)
1800 1710.0 — 1785.0 1805.0 — 1880.0 512 — 885 Europe, Middle East, Africa, most of Asia, Brazil, Uruguay, some Caribbian countries
GSM 1900
(PCS 1900)
1900 1850.0 — 1910.0 1930.0 — 1990.0 512 — 810 USA, Canada, many other countries in the Americas.
Soviet Багта-50 telephone interfaced to the GSM network.

A Soviet Багта-50 rotary-dial telephone from around 1955, which I have interfaced to the GSM network.

OpenBSD with Linksys WPC55AG 802.11a+g WLAN card, with Atheros chipset capable of 802.11i / WPA2 security.

OpenBSD notebook with Linksys WPC55AG WLAN card. Its Atheros chipset is capable of 802.11i/WPA2 security.

Acronyms

OFDM Orthogonal Frequency-Division Multiplexing
SOFDMA Scalable Orthogonal Frequency-Division Multiple Access
BPSK Binary Phase-Shift Keying
QPSK Quadrature Phase-Shift Keying
QAM Quadrature Amplitude Modulation
CCK Complementary Code Keying
Kismet sniffing packets and detecting wireless activity.  Running in a BSD xterm window.

Kismet running in an OpenBSD xterm window, sniffing packets and observing wireless network activity at the Greyhouse coffeeshop in West Lafayette, Indiana. And yes, they really want you to use their WLAN, so you'll hang out there and buy more coffee.

Also see my page about the RF spectrum.

WPA2 / 802.11i Secure Wireless Networking

Wide-Area Network (WAN) Specifications

How to program Cisco Catalyst and 3com 3000 switches

Cisco Catalyst 2900 XL Ethernet switch disassembly and repair

UNIX, MacOS, Cisco IOS, and Windows TCP/IP commands

Network and Telecommunication Cables

Back to the networking page

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