INTEL WIRELESS
Wired Stuff
WiFi Tablet Corner
My80211 White Papers (Coming Soon!)

Cisco Wireless Compatibility Matrix (Nov. 2011)

Podcasts / Videos

My80211 Videos

Cisco: 802 11 frames with Cisco VIP George Stefanick

Fluke Networks: Minimize Wi Fi Network Downtime

Aruba: Packets never lie: An in-depth overview of 802.11 frames

ATM15 Ten Talk “Wifi drivers and devices”

Houston Methodist Innovates with Wireless Technology

Bruce Frederick Antennas (1/2)

 

Bruce Frederick dB,dBi,dBd (2/2)

Cisco AP Group Nugget

Social Links
Revolution WiFi Capacity Planner

Anchor / Office Extends Ports

 

Peek Inside Cisco's Gear

See inside Cisco's latest wireless gear!

2.4 GHz Channel Overlap

EXAMPLE 1  

EXAMPLE 2

EXAMPLE 3  

CWSP RELEASE DATE 2/08/2010
  • CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
    CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
    by David D. Coleman, David A. Westcott, Bryan E. Harkins, Shawn M. Jackman

    Shawn Jackman (Jack) CWNE#54 is a personal friend and has been a mentor to me for many years.  I've had the pleasure and opportunity to work with Jack for 4 years. Jack is a great teacher who takes complex 802.11 standards and breaks them down so almost anyone can understand the concept at hand. I'm excited for you brother. Great job and job well done! Put another notch in the belt!

IEEE 802.11a/g/n Reference Sheet

 

LWAPP QoS Packet Tagging

 

 

Interference Types

BLUETOOTH
 

Microwave Oven
 

Cordless Phone

JAMMER!
 

« Basic Cisco AP Debugging - Autonomous IOS | Main | Recover WEP, Admin, Guest account Password from WLC »
Monday
Dec122011

792x phone may not reconnect when invalid 5 GHz beacon received : CSCtk58591

A more recent bug found on 1.4(1) 792x handset code. Something to take note if you're on this code and using voice on 802.11a

CSCtk58591 Bug Details
792x phone may not reconnect when invalid 5 GHz beacon received
Symptom:
792x phone may not reconnect when invalid 5 GHz beacon received.

Conditions:
792x phone going out of range then comes back in range when set to scan 5 GHz.

Workaround:
Power cycle the phone.
Use 802.11b/g only mode.

Status Status
Open

Severity Severity
3 - moderate

Last Modified Last Modified
In Last 3 Days

Product Product
Cisco Unified IP Phone 7900 Series

Technology Technology
Wireless, Mobile

1st Found-In 1st Found-in
1.4(1)
Interpreting This Bug
Bug Toolkit provides access to the latest raw bug data so you have the earliest possible knowledge of bugs that may affect your network, avoiding un-necessary downtime or inconvenience. Because you are viewing a live database, sometimes the information provided is not yet complete or adequately documented. To help you interpret this bug data, we suggest the following:
  • This bug has a Moderate severity 3 designation. Things fail under unusual circumstances, or minor features do not work at all, or things fail but there is a low-impact workaround.
  • This is the highest level for documentation bugs. (Bug Toolkit may not provide access to all documentation bugs.)
  • Severity levels are designated by the engineering teams working on the bug. Severity is not an indication of customer priority which is another value used by engineering teams to determine overall customer impact.
  • Bug documentation often assumes intermediate to advanced troubleshooting and diagnosis knowledge. Novice users are encouraged to seek fully documented support documents and/or utilize other support options available.
  •  

     

    PrintView Printer Friendly Version

    EmailEmail Article to Friend

    Reader Comments (3)

    Worrying! Thanks George

    December 13, 2011 | Unregistered CommenterRob S

    We have a very large deployment of 7925 and just went through major testing with TAC and BU for 1.4.1.. the short answer... DO NOT USE 1.4.1! Stay on 1.3.4 if you can. If you must go to 1.4 as we did for another issue go directly to 1.4.2 which is out in official release as of a few weeks ago. Major bug fixes. We tested engineering releases for a while as well.

    December 13, 2011 | Unregistered Commenterscotty1213

    >>Workaround: Use 802.11b/g only mode.

    Hilarious. If you're in the desert or underground, maybe. :)

    April 5, 2012 | Unregistered CommenterJustin

    PostPost a New Comment

    Enter your information below to add a new comment.

    My response is on my own website »
    Author Email (optional):
    Author URL (optional):
    Post:
     
    Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>