Aironet cb21ag vs intel 3945abg

I purchased a Cisco Aironet CB21AG PC-Card because it comes with a decent site survey tool to determine signal strengths, etc. I also thought it was supposed to be a really decent card.
I'm using it in a laptop that has a built in Intel Pro 3945ABG wireless card, and it seems like the Intel Pro 3945ABG card is always showing a stronger signal to the network than the Cisco card.
How reliable is the Signal Stength value that shows up on the wireless icon in the taskbar. For example, the laptop is stationary, not moving, etc. and the signal strength of the Cisco card is showing LOW, yet the signal strength of the Intel card is showing VERY GOOD.
At these readings, the Cisco site survey tool is showing the signal strength at -77dBm and SNR at about 18-20dBm with the link speed set at 24Mpbs. I do not know the exact signal stength readings of the Intel 3945 card because Cisco's tool doesn't report on that card, just on the Cisco card. So I have to base my opinions off the icon in the taskbar that shows signal strength at VERY GOOD.
So I guess I'm looking for input here as to whether the Intel card is possibly more sensitive and can achieve a better connection than the Cisco card, or whether it's more likely that the reported numbers on the Cisco card or just more accurate...
Any thoughts?
JR

Just a quick followup.
For example.
On my laptop with the built in 3945abg card, and a Cisco Cb21AG PC card installed, when both devices are communicating with the same WLAN, the Cisco card is showing a -77dBm signal strength (+/-1 dbM varies) according to the Cisco Aironet Site Survey Tool while the Intel 3945ABG card is showing a -66dBm signal strength (+/-1dBm varies) according to the Intel ProSet Tools.
Same AP, same laptop, just different wireless devices... reporting a 10-11dBm difference between them.

Similar Messages

  • Cisco Aironet CB21AG, LEAP Software & ACS - No DHCP

    We got our first CB21AG cards last week, and I've been playing with it to get it to work with the APs and ACS server that we have setup. I've installed the software and configured it exactly as the LEAP software for the older A cards is setup but the APs don't seem to want to assign a DHCP address to the computer. However, if I assign a static/alternative IP to the computer, and reauthentic, the wireless connection works great. Also, the Authentication window doesn't come up immediately after I hit Ctrl-Alt-Delete to login into the machine, as it did with the older software.
    Steps I've tried: Removing and reinstalling the Cisco LEAP software, Reauthenticing the machine to the AD Domain, and Starting with a Static IP and then converting to DHCP.
    Laptop: Panasonic ToughBook CF-29, WinXP, CB21AG Card.
    APs: Aironet 1200s, A & G Radio equipped
    Any help or ideas would be appreciated.

    Thanks for the nudge in the right direction. My guess is that this will solve it, but I'll know sometime next week, once we get a chance to flash the APs.

  • Satellite L100 - Upgrade Intel 3945ABG to 4965 AGN WLAN card?

    I would like to know if in a Satellite L100 is posiible to change the 4965AGN wifi card for one 3945ABG or there may be problems or incompatibilities with the motherboard chipset which is an i945 GM GM.
    Thanks in advance

    Hello enoac
    You wrote you want to CHANGE WLAN card.
    If you want to use internal WLAN card and get it work please let us see what can be done with it.
    Your postings dont offer much info and I dont understand what the problem is exactly.
    Is card installed and listed in device manager properly?
    Can you enable or disable WLAN card using FN+F8 key combination?
    Is WLAN LED on when you enable WLAN card?
    Can you scan area and see available WLAN networks?
    What happen if you try to connect to your WLAN network?
    Have you tested WLAN with different routers?
    Please dont discuss using one or two sentences. Explain exactly what happen and what have you tried to do already.

  • Intel 3945ABG wireless adapter

    I have a wireless adapter problem.
    I am unable connect to my wireless modem using the wireless adapter. I can only connect with the Ethernet adapter and cable. I am unable to renew or release an IP address or get a manually set IP to work on the wireless network. Another laptop computer connects to the wireless modem fine.
    I tried downloading and installing the adapter driver from Lenovo, but that failed halfway through unpacking and transferring to the hard drive, with the message "access is denied" on C:\SWTOOLS\DRIVERS\WLLANINT\Vista\Apps\v32\Thumbs.db.
    Does anyone have any ideas about my wireless network problem or how to successfully install a new driver?
    Many thanks
    Gil Lambert

    delete the thumb file then try to re-install.
    by the way, do not forget to switch the wireless button ( probably front side of your computer ) and make sure you activate wireless by pressing fn + f5 ( also make sure your function keys are working, if not, re-install power management )

  • Satellite M100: Slow WLan data transfer with 3945ABG Intel Wlan card

    Have just popped a brand new M100 with XP upgraded to SP2 onto our network and am having trouble with the Wifi.
    Everything works, just really really slowly. Takes about 5 minutes to drag an MP3 off the file-server, web pages download at the speed of a dial-up modem and my beard doubles in length waiting for even a modest flash file to load.
    Have tried the following so far...
    - Speed is good on the ethernet cable, just not on the wifi.
    - Connection speed is good on the wifi (11Mbps) and signal strength is excellent.
    - All other laptops on the network are working fast
    - I have updated the drivers to the latest provided by intel, no change
    - I have applied all service packs and updates to XP (was a brand new box yesterday)
    - Disabling various modes on the driver make no difference
    - Switching off the QoS mode in the network panel doubled the trickle of data
    I see from earlier posts that I'm not the only one who has had this problem with the Intel 3945ABG chips, but I don't see a solution posted. Has anyone had success is solving this kind of problem.
    The data throughput is barely usable for internet access and quite inoperable for LAN filesharing or Skype.

    Sounds weird. If PCMCIA WLan card gives you good speed it means that there is nothing wrong with your Internet connection, just with built-in wlan card.
    You probably should use your warranty services or better yet to return it to the shop and get a new one straight away.
    In my country if something brakes within a few days after purchase you don't need to send it to repair under warranty because the shop usually agrees to replace it with new one if they have it in stock.
    There is one thing I think you better try: Take it to your friend who has wireless network or to the nearest free hot spot, connect to internet from there and see what speed you get.
    It could be, though longshot, that your router has compatibility issues with this specific built-in wlan card.
    For example I also have a slight compatibility issue between my d-link router and built-in intel wlan card, but it is about security protocols and not the speed.
    Overall it seems to me that this intel wlan card is not that good.

  • Iwconfig have no results since 2.6.24 kernel update with intel 3945

    Hello,
    Since the last update of the kernel (2.6.24) in x86 with an intel 3945ABG wireless chipset,
    I have no wireless extention in iwconfig.
    I have just l0 and eth0 (ethernet).
    what I supposed to do to have my wireless come back ?
    Is it a module to load at boot or something else ?
    Thanks

    I presume that you're using the ipw3945 or iwlwifi drivers? If so, when you updated the system, the correct newest version should have been pulled in along with the kernel update. (Mine gave me a newer ipw3945 and catalyst drivers, for example).
    Try 'pacman -S ipw3945 ipw3945d' or 'pacman -S iwlwifi' and see if it gives you your updated driver/modules.
    If you are using the non-standard 'vanilla' 'tp_plus' 'rt' or 'dkms' kernels, there might also be newer drivers floating around, otherwise it's up to you to compile them...
    Edit: Actually, according to this post the iwlwifi drivers are included in the kernel, so if you saw something like this:
    :: Starting full system upgrade...
    :: Replace iwlwifi with core/kernel26? [Y/n]
    And answered 'Y' then you already have them. A simple matter of 'modprobe iwl3945' should bring your interface back.
    HTH
    Last edited by wyvern (2008-02-12 15:05:18)

  • WRT110 crashes with Vista SP1 and Intel 3945

    I have a WRT110 with the latest firmware 1.0.4, an a Dell XPS1330 with the Intel 3945abg wireless card and the latest drivers in Intel. When ever my laptop tries to connect the router crashes and drops all other connections with other wireless devies and wired devices. I also have another laptop running XP that works great on the wireless connection. It's same to say the problem is limited to the Vista machine and the Intel 3945 wireless card. Now sure what to do?

    I have the same problem. Took me a while to figure out that when i connected my Toshiba laptop with Vista and Intel 3945 Router and network crashed couldnot even get the router accessed on hardwired computer. Everything returns back to normal when laptop disconnected from wireless network
    Customer support was not able to help, called them twice. I solved by connecting an old wireless router to one of the ports of Linksys and connect my Vista laptop on that wireless network. That is not really a solution but if you'd like to, return the router until they can at least admit that there is a problem with compatibility, upgrading firmware on wireless adaptor did not help.
    (Mod note: Edited for guideline compliance.) 
    Message Edited by kent07 on 11-06-2008 06:33 PM

  • T61, T60 - BSOD for Intel WiFi cards, Middleton BIOS, & Win 8.1 & 10

    This is an "all-in-one" post. Recently, my trusty T61p started getting Blue Screens of Death (BSOD) with the following message:
    DRIVER_IRQL_NOT_LESS_OR_EQAL in sysnetwlv64.sys This has been frequently reported as a complication of Windows 8.1 (only) when installing the Intel drivers for the 3945 and 4965 WiFi cards.  Both Intel and Microsoft state that these cards, plus the 5200 are no longer supported, but the 6200, 6300, etc. are. Suggested remedies are:
    1. For the T61's, reflash with the Middleton BIOS (2.29 plus mods - no white list, SATA 2 works).  Then install a more recent WiFi card that has supported drivers for Win 8.1.
    2. Change cards in both the T60 and T61s to the IBM/Lenovo ThinkPad 11a/b/g/n Wireless LAN Mini-PCI Express Adapter 42T0825 (this is an Atheros AR5008 5418 AR5BXB72). In recent posts I have seen about Win 10, the old Intel drivers that used to work for Win 8.0 (but didn't in 8.1) appear to work in Win 10.  (However, since it is still before July 29, I can only assume this is in preview versions, not RTM).  If anyone has actually in installed the Win 10 RTM and had no problems, this whole thing may be a "non-issue".  Is there any experience with this? If I follow the remedies suggested above:
    1. Using the replace the card approach with the Middleton BIOS, what is a good card to get?  The other benefit of the Middleton BIOS is to allow the harddrives in the T-61's as SATA 2 instead of the dumbed-down SATA 1 as in the stock 2.29, 2.30 BIOS
    2. If I follow the replace with the Atheros cards, I assume the best approach is to see if there are 3 antennas in the T60 (the T61's already have them).  If not, I understand that I can add the 3rd antenna with FRU 42R9909. For specific machine configurations, see the specs at the bottom (they're all "FrankenPads"). Many thanks for looking and your comments... --------------------------------------T-61p -- 15.4" WXSGA+, Win 8.1 64-bit, BIOS 2.30, CPU-T9500 2.6 GHz (Penryn), RAM 8GB DDR2-667 (2x4GB), HD 500GB (7200RPM, SATA 2, WD5000BPKT-00PK4T0), NVIDIA Quadro F570FM (1680x1050 - 9.18.13.2702), DVD-RAM, WiFi Intel 4965 (13.3.0.137), Ethernet Intel 82566MM (9.13.41.3), Ricoh Media Cardbus (6.3.9600.16384), Biometric CPU (1.6.1.341), Conexant Modem (7.62.0.0), Broadcom Bluetooth (12.0.0.8047) T-61 -- 14.1" WXGA+, Win 8.1 64-bit, BIOS 2.30, CPU-T7800 2.6 GHz (Merom), RAM 8GB DDR2-667 (2x4GB), HD 320GB (7200RPM, SATA 3, WD3200BEKX-22B7W4T0), NVIDIA Quadro NVS 140M (1440x900 - 9.18.13.2702), DVD-RAM, WiFi Intel 4965 (13.3.0.137), Ethernet Intel 82566MM (9.13.41.3), Biometric CPU (1.6.1.341), Conexant Modem (7.62.0.0), Broadcom Bluetooth (12.0.0.8047) T-60 -- 14.1" XGA, Win 8.1 32-bit, BIOS 2.27, TPM 1.2, CPU-T7600 2.3 GHz (Merom), RAM 3GB usable DDR2-667 (2x2GB), HD 320GB (7200RPM, SATA 2, WD3200BEKT-00PVM4T0), Intel Graphics 945 Express (1024x768 - 8.15.10.2697), DVD-RAM, WiFi Intel 3945ABG (13.3.0.137), Ethernet Intel PRO/1000PL (9.15.11.0), Biometric CPU (1.6.1.341), Conexant Modem (7.62.0.0), Broadcom Bluetooth (12.0.0.8047)

    I'd say go with Middleton BIOS either way (SATA II). In which case, get a newfangled 802.11ac card while you're at it.

  • Intel Centrino 6200N on X60s?

    Hi all,
    I bought this card on ebay (Lenovo branded) hoping it would work with my X100e.  Both are arriving soon.  I see now that the BIOS will not allow the X100e to boot with the 6200 in place.  How about on my X60s?  It currently has an Intel 3945abg card and for that reason, I keep my home wifi "802.11n with g-compatible."
    Any ideas?  Or should I just return the card when it arrives?

    Unlike the x100, for the x60 there's already a bios with the whitelist removed.
    http://forum.thinkpads.com/viewtopic.php?f=29&t=55​837
    So, even if the stock bios doesn't accept that card you can easily fix the problem.

  • Satellite L100-108: Upgrade from Intel 3945 WLan to Intel 4965agn

    Hi,
    It is possible to replace the wifi card that brought the Satellite L100-108 (Intel 3945ABG) for the one Intel 4965AGN?
    Both cards are mini pci-e and the chipset on the motherboard (with the Everest says only that it is Toshiba), is the Intel i945GM.
    Thanks in advance

    Hi
    Why you want to upgrade the WLan card?
    I mean the Intel 3945ABG provide three different WLan standards.
    OK, the Intel 4965AGN provides the 802.11 N standard but this standard cannot be used because the WLan card would need 3 wire wlan antenna
    As far as I know the L100-108 has been equipped with two wires Wlan antenna which is designed for A B and G WLan standard.

  • C3000 N100 and Intel 4965AGN compatibility

    Hi,
    I have a Lenovo C3000 N100 notebook (0768-BQG) which comes with an Intel wireless 3945ABG mini-PCI express adapter. I would like to replace that card with Intel 4965AGN (the same form factor) to use the 802.11n standard at home. I am aware that wireless adapters are authorized by some manufacturers and to avoid error 1802 “Unauthorized network card is plugged in. Power off and remove the mini-PCI network card.” I would purchase a card with the Lenovo FRU number 42T0865 (Intel 4965AGN MM1) which is used in some ThinkPads.
    Here are my two questions:
    1. Is any BIOS version for 0768-BQG machines compatible with the Intel 4965AGN adapter?
    (TV Access Connections from version 4.40 seems to be).
    2. Has someone already made successfully such upgrading?
    I would like to avoid no-1802.com-like solutions.
    Thanks for any help, Peter

    I would also like to upgrade the wireless card in my laptop, which is a 3000 C200.  Currently has the Intel 3945ABG which barely works - always dropping connection even when sitting right next to the router.
    Does anybody know which cards are whitelisted in the BIOS?
    I suppose getting any help from Lenovo on this front would be out of the question? 
    Message Edited by blueskiwi on 10-22-2008 10:15 AM

  • Is Intel 3945 network adapter suitable for 50Mbit/s?

    Hi,
    Today i installed a modem from Ziggo (Netherlands). My internet speed is now 50Mbit/s download.
    On my laptop A200-1CN PSAECA my wireless download speed is max 20Mbit. Now i think the networkadapter of my laptop is not suitable for this speed. Could anyone confirm this?
    Can this networkadapter be replaced by a faster one? By myself or only at Toshiba service-centre?
    Awaiting your reply.
    Thanks in advance and best regards,
    Paul

    Your notebook is delivered with Intel 3945ABG WLAN cards. Support networks are 802.11a/g. So in g mode you should have this speed, even higher than that.
    But the WLAN speed depends on many different factors:
    Which kind of DSL package do you have?
    Is the right WLAN mode set in router and in WLAN card properties?
    Maybe is data source overloaded and you cannot use this speed for download.
    Generally speaking your notebook should not have problems with this WLAN speed but other factors are very important too.

  • Re: Problem installing WLAN device for Satellite A100-813

    Hello,
    I recently formated my laptop and went to toshiba driver download section.
    And downloaded and installed all of the drives except my LAN NIC and WLAN NIC.
    I tried download all the driver models but still wont install.
    I tried switching the WLAN on and tried again, still no luck.
    Here is a pic from what I still need to install.
    [picture |http://img9.imageshack.us/img9/3751/80023479po1.jpg]
    Thanks in advance
    -Scott

    Hi
    Seems you tried to install the wrong drivers for wrong notebook series.
    The Sat A100-813 belongs to the PSAA8E series and the notebook has been equipped with the Intel 3945ABG WLan card and with Intel Pro/100 LAN card.
    So both are Intel chips.
    Check the Toshiba European driver page again and try to install the drivers again!
    Bye

  • HP Pavilion DV6750er Laptop no longer go into passive cooling

    After flashing BIOS version F.58A laptop stopped completely disable the cooler cooling, although the laptop cool and clean heatsink (tested). Can I get an older version of firmware, when the notebook works better for power.
    Laptop has less to operate from the battery. Please Put a previous version of BIOS, for me it is very important.
    Intel Core 2 Duo Wi-fi Intel 3945ABG NVIDIA GF8400GS

    Hi,
    If the battery of the HP laptop is not in a good condition, sometimes booting problems might happen. To remove any static charges accumulated in the battery, you would have to remove the battery and press the Power button for about 25-35 seconds. Then reset the battery. Even after this, if your laptop is not booting up then you could perform the battery calibration and press F8 key to boot in safe mode.
    Get more information to fix Hp laptop booting issues :
    http://supportforhp.iyogi.com/laptop-not-booting.html
    Hope this information helps you.
    Set peace of mind as your highest goal,and organize your life around it.

  • Looking for a beginners guide ot site survey

    Good evening,
    Getting ready to do a site survey of a rather large facility... About to switch to an entirely different wireless nic (intel 3945ABG) which isnt performing as well as its cousin, 2200BG. Reviewing the stats of the cards it doesnt make sense as intel claims (from my understanding) the 3945 is more sensitive.
    Given the sheer size (220,000+ sq feet) of my facility i want to ensure i do this correctly the first time around. I have the given equipment which will be deploying this card.
    What i have done in the past for resolving some issues is going every 5 feet and recording by hand the SNR using something along lines of netstumbler. Is this correct?
    any suggestions will be great.

    Hi Robert,
    Here is some info that may help;
    Wireless Site Survey FAQ
    http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml
    This Excel macro tool is designed to work with NetStumbler to help you complete a wireless site survey. While running NetStumbler, the macro allows you to timestamp your live access points, collect signal levels of each access point, and export the raw NetStumbler data to create a handy report.
    http://whitepapers.zdnet.com/download.aspx?docid=177121&promo=100400
    Hope this helps!
    Rob

Maybe you are looking for