10B Wireless Troubleshooting V1 1

Slide1: 

Wireless Troubleshooting

This presentation Covers:: 

This presentation Covers: Wireless overview Wireless Standards WEP Wireless Adapters How to troubleshoot wireless issues

IEEE: 

IEEE IEEE: Institute of Electronics and Electrical Engineers -is an international non-profit, professional organization for the advancement of technology related to electricity. -is the world’s largest professional association advancing innovation and technological excellence for the benefit of humanity. -is the trusted “voice” for engineering, computing and technology information around the globe. It has the most members of any technical professional organization in the world, with more than 365,000 members in around 150 countries.

Wireless overview: 

Wireless overview 802.11 x The X shown in the 802.11 X above is the term used to describe the family of 802.11 standards 802.11 and 802.11x refers to a family of specifications developed by the IEEE for wireless LAN (WLAN) technology 802.11 specifies an over-the-air interface between a wireless client and a base station or between two wireless clients. The IEEE accepted the specification in 1997.

Wireless Standards: 

Wireless Standards A,B,G,N 802.11a - an extension to 802.11 that applies to wireless LANs and provides up to 54-Mbps in the 5GHz band. 802.11b - an extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission in the 2.4 GHz band. 802.11g — applies to wireless LANs and is used for transmission over short distances at up to 54-Mbps in the 2.4 GHz bands. 802.11n —The additional transmitter and receiver antennas allow for increased data throughput through spatial multiplexing and increased range. The real speed would be 100 Mbit/s (even 250 Mbit/s in PHY level), and so up to 4-5 times faster than 802.11g.

Frequencies: 

Frequencies In 1985, the United States allocated three frequency bands to Industrial, Scientific, and Medical use. These frequency bands, called ISM for short, are the 902-928 MHz, 2.400-2.4835 GHz, and 5.725-5.850 GHz bands. TWC’s SBG900 will operate on the 2.4 GHz range: With that said the SBG900 will run 802.11 B or G. This could run interference with any other device running on that 2.4 GHz range. If an agent runs into this issue we can log into the modem and change the CHANNEL of the SBG900.

Channels: 

Channels The 802.11b standard defines 14 frequency channels in the 2.4GHz range, but only eleven are allowed for unlicensed use by the FCC in the US. Each channel spreads the data over the channel that extends 11MHz on each side of the center frequency, and - this is important - the channels overlap. This table depicts the center frequency of each channel.

WEP : 

WEP WEP – Wired Equivalency Privacy The privacy protocol specified in IEEE 802.11 to provide wireless LAN users protection against casual eavesdropping. WEP refers to the intent to provide a privacy service to wireless LAN users similar to that provided by the physical security inherent in a wired LAN. What Does WEP do? It simply secures your network. Customer’s with a 64 bit encryption WEP = 10 digit home phone number SSID = Four zero’s There are Two Character modes of Encryption when setting up WEP Alpha/AscII = 5 Letters Hexadecimal = 10 Numbers

Troubleshooting Issues : 

Troubleshooting Issues No wireless light Needs WEP key Unable to connect to wireless Unable to see wireless network Need to set up WEP Connected / Unable to browse No Lights on wireless adapter

No Wireless Light : 

No Wireless Light Log into modem make sure wireless interface is enabled If not – Enable it If Yes – Possible causes : Firmware upgrade/ Bad Modem

Unable To Connect To Wireless Network: 

Unable To Connect To Wireless Network Disable Firewalls & test Try to let Windows control the wireless settings & test Make sure DHCP/DNS is set to automatic Do Winsock Fix & test Reinstall wireless adapter software & test Switch USB ports & test (Windows XP) If none of the above work customer may have Spyware/ Viruses

Unable To See Wireless Network: 

Unable To See Wireless Network Power cycle modem & refresh network list Check to see if there is a 2.4 GHZ cordless phone in range If there is a hard wired connection to modem log in and change wireless channel & test Change Network Name

Need To Set up WEP : 

Need To Set up WEP You can do this two ways Walk sub through the process Have sub enable remote access feature You want to change Channel, ESSID, and setup WEP

Connected /Unable To Browse: 

Connected /Unable To Browse Disable firewalls & test Make sure DNS is set to automatic Do Winsock Fix & test Try pinging by IP address If none of the above work customer may have Spyware/ Viruses

No Lights On Adapter : 

No Lights On Adapter Make sure device manager is picking up the device Try a new USB port If no light come – adapter may be bad

Questions?: 

Questions?