ceiling of 75 Mbps Wireless-N

Similar Questions

• Router LinkSys WRT160N V2 does not recognize my USB SMC EZ Connect 11 Mbps Wireless

  I have a Linksys WRT160N V2 router. So far I have correctly connected, using two 'wired' connections, my laptop and the printer. I was able to add two DS, Wii, wireless, another laptop and a PC. The laptop that connected wireless uses the D-Link wireless device and the PC uses an other SMC wireless device. All these things correctly connect through wireless connections. The last PC I tied to conenct uses USB SMC EZ Connect 11 Mbps Wireless. This computer can actually 'see' the Linksys router and this is the SSID. When I try to connect to him, he thinks about it for about 5-10 seconds and then fate and says "Detected wireless networks". Ironically, a neighbor also has a Linksys router. Its protected by WEP, but for some reason, my PC is ready to connect to the Linksys router (has a different SSID), but since I do not know the WEP key (I don't want to actually connect to sound at least) it shows the strength of connection 11 Mbit/s and of course, does not have an IP address. Why my router does not recognize my Wireless Linksys router? I even used the LELA 'Search' application for new devices, and he can't find it, all the while my PC 'sees' the router and fails to connect. Someone knows why? FYI, the PC in question just had XP loaded on it (total reconstruction) and has never been only once on the interent.

  If you have disable wireless security is disabled, and if still you are not connect to your wireless network, then I think you should try upgrading the drivers for your SMC card, once you update the drivers for you adapter after this you can try to connect to your wireless network.

• 189 45 Mbps Wireless and wired

  I have a Huawei recently installed (Optical Network Terminal). When my ISP technician moved, he received 191 Mbps and upload 19.50 Mbps, it worked well for two days...

  I have a Time Capsule 37 b for a Wi Fi network. And now 45Mbps wireless...   Wired 189Mbps. What's wrong with the settings?

  Thank you

  3 TB does not define the model... so is this height with AC TC wireless?

  You test speed on a computer with card WiFi AC near the TC? If you test remotely, it is likely that have traded to 2.4 ghz because the signal is best... It is a standard installation on TC... your Mac or your idevice will connect to any signal is strongest... not the fastest 5 GHz band...

  To be able to 5 GHz force give the band a different name.

  However we often find the TC has problems with connections fiber... especially if you use PPPOE for authentication.

  What authentication method uses your installation?

  The Huawei router as well or the installation of TC as a router?

• x 301 only connection to speed Wireless G (54 Mbps) Wireless-N network

  Need help to understand this.  Just got my new x 301 running Windows 7 Professional 64 bit - big machine.  So far only one problem - does not connect to the faster that 54 Mbit/s to my router (DLink DIR-655).  The wireless adapter on the PC is Intel(r) wifi link 5100 agn.

  I have 2 other computers that are connecting at speeds between 130 and 270Mbps according to their mood (or wireless card) wireless-N so I'm reasonably confident the router settings (for example, WPA2 encryption, mode dual n/g, channel width Auto 20/40) are usually very good.    Despite this - the x 301 is stuck at 54 Mbps.  When I look at the adapter for x 301 diagnostic output, he claims that my network access point is of "unknown type".  When I look on the router status page it says that PC is connected wireless G.  When I look at the dial-up connections it say that the network is a Wireless-N.  In all cases though 54 Mbps is reported as the connection speed.  I have tried everything I can think and seen in various one for (for example, mirror adapter settings claim work, download and update driver Intel, etc.) but may not make a difference.

  Any ideas about what I'm missing would be appreciated.

  Thank you.

  Thank you.  I had finally it works.  WMM router parameter was not active and changing who did it (no idea what it does well).  Who + play for a long time with different settings of the adapter and the router, I got a reasonably stable high speed connection.  Still not perfect as speed fluctuates more that should be, but reasonable performance.  Get this job shouldn't be that hard, but I guess it is.  If I had known before time to be an engineer to understand network that I would have stuck with a stable connection 54 Mbps and not worried about it.

  Agree with the notion that sometimes less is more - especially if a values personal time away from various configuration pages.  Opportunity for someone to create simple, 5th year level software that can take care of such things.

  All this aside - my new x 301 is by far the best computer I've had, so not all bad.

• Drivers for NETGEAR WG311v3 54 Mbps Wireless PCI Adapter will not work.

  Windows 7 installs the drivers for the WG311v3 automatically, but after installation, the hardware does not work and I have an exclamation mark next to the card wireless in Device Manager.  I then looked at the properties and saw in the device state that "the device cannot start. (Code 10) "this device worked under vista, but doesn't work on 7. I installed the drivers that came with him and tried all compatibility modes, but nothing works. Any Suggestions?

  My hardware is
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  -motherboard: Asus PN5D

  Have a look here

  http://KB.NETGEAR.com/app/answers/detail/A_ID/11127/kW/Windows%207/r_id/100109

  above the link for the driver

  http://forum1.NETGEAR.com/showthread.php?t=41978

  I have not updated my, but did some research on the whole.

• Satellite Pro A200-16YT - update wireless adapter card for 802.11n

  Satellite Pro A200-16YT (PSAE1E) with Windows XP Professional SP3 from the East.
  I tried to increase my existing 54 Mbps wireless network speed by replacing the Atheros AR5007-EG existing with 802.11n 802.11a/b/g more quick adapter.

  The Atheros driver is v9.2.0.439 (08/04/2011) it's later. I tried to install an Azurewave AR5BXB72 (Atheros AR5008) as a substitute, but without success. As well as trying the standard Windows wireless configuration, I used the Atheros Client Utility (ACU) which confirms that the card and the driver are installed and activated, but the radio does not, so no there is no association/connection to the wireless network!

  Reinstall the original AR5007 works without any problem. If someone experienced similar problems or can offer a solution, it would be greatly appreciated. Thank you

  Hello

  Not sure about this Wlan card but I read in the forum that some people had similar problems, allowing the new card Wlan.

  Check this thread for example:
  http://forums.computers.Toshiba-Europe.com/forums/thread.jspa?MessageID=253505

  It seems that the problem is related to the assignment of the WLan card pins.

• Satellite A200-1TS - get only 117 Mbps on Draft N

  Hey there,

  I have a Linksys WAG160N (large router).

  The problem is here, in my laptop (running on Windows 7), he gets up to 117.00mbps...

  But on the other hand, sister of desktop PC (very old haha xD) with an of D-Link USB wireless adapter, he gets up to 320mbps (or 240mbps one of those who do not remember) but way higher than my laptop.

  Why?

  I really want my laptop by wireless but I want him to have several Mbps wireless-n, that should I do or what is the problem?

  Hello

  Depends on the speed of transmission of data to the server where the data would be received. This means that your download speed is different. Sometimes it could be higher, and sometimes it might be lower.
  In addition, it seems that you share the connection with other computers.
  This could affect the speed too.

  Finally and above all your OS is not a final version. There are still many bugs.
  I put t know if it s related to your Win 7 but nothing is impossible

  Cheers mate

• Tecra A10 - 11 M unable to connect wireless with protocol draft n

  I have a Tecra A10 - 11 M, which has the Atheros AR5007EG wireless card. My OS is WIndows 7 64 bit.
  Although it connects up to 54 Mbps Wireless, I can not get connect with draft n, which is supposed to support Toshiba Tecra peculiarities.
  I have installed the latest driver for my wireless card with (ver.8.0.0.258). Can someone help me with this?
  My router is ok because I connect my other laptop with 802.11n without problem.

  Hey,.

  Where you can find this information as the Tecra A10 - 11 M N support project?

  If I search on the Toshiba Web site for several models Tecra A10, take all support 802. 11 b / g only.

• The wireless network appears as having acquired the IP on Windows XP.

  The card is XOOOOEJSM5:5060188042. Down, I loaded the supplied driver. The system recognizes that the jury of the signal strength is excellent

  at 54 Mbps but the status are the acquisition of address monitoring.

  Original title: I have a 54 MBPS Wireless PCI Adapter Card 802.11 G W/F who does not seem to be able to get my network address. What should I do now?

  Hi John,.

  This can often be a problem with a security encryption. There may be a wrong key entry or the client adapter does not support the encryption is used.

  To try to resolve this first change the SSID for your laptop is obliged to create a new profile. Set security based WEP 64-bit, and then try to connect again. Update the drivers of wireless adapters.
  I have

  f you have a third-party firewall, try and disable them temporarily to ensure that they are not block it.

  Good luck

• Update Wireless Networking card (P7 - 1037c)

  Hello.  I have Pavilion P7 - 1037c that I would like to upgrade the wireless card on.  The Board of Directors in this regard has 3 pci-express X 1 and a mini-map pci-express slots avaiable.  I need a card that is compatible dual band.  I know there's a mini-map installed 2.4GHtz.  Someone at - he was successful in this kind of upgrade?  It would be my first upgrade of minimap, so I thought I should ask.  TY

  Ok. I have a ASUS 53 PCE 300 Mbps Wireless PCI-e x 1 card that runs well with Windows 7. You can find the map to many suppliers. I found a reliable solution in point 8.1 of Windows.

• EA3500 responsible N750 of ceiling in my internet speed?

  I use the EA 3500 router through which my main computer is connected (wired) - wifi being disabled on this router (I have another access point elsewhere in the House).

  My ISP (cable) just upgraded me from 20 Mbit/s download / 10 Mbps upload at 30 Mbps / 10 Mbps last week.  However, my speed test keep (from this computer plugged direct into the EA3500) saying that I'm still 20/10...

  We have reset the cable modem ISP (ISP-driven), tried many other sites, nothing helps.

  Their technology has suggested it * could * be the router Linksys that would "put something" (unintentionally) to put a ceiling of 20 Mbps, since their modem indicate it is programmed for 30.  Now, I'm looking in the web interface of the router and do, indeed, the appearing speed test it displays a scale which stops at 20 Mbps...

  Is it really the case with this router? Or is there a setting somewhere in the router settings I need to change to allow for more high speed internet?...

  I would like to dismiss this troubleshooting step and move on...

  Thank you

  Rob

  Hi, lanstrad. Are you referring to the prioritization of the media? If so, you can do one of 3 options. One, set the downstream and upstream to 0 bandwidth. Second option would be to re-establish the order of precedence. Turn off Finally, prioritization of the media. That should give you at least 30 Mbps or more. I hope this works. Keep us informed. Information. Share it. Learn the lessons.

• WRT54GS - wireless performance problem

  Dear someone

  I am currently having performance problems with my WRT54GSv1.1

  Just received my new internet connection to 30Mbit. Unfortunately, I am not able to download at that speed. If I connect via one of the linksys router's ethernet ports, I'm a happy person, but using the wireless makes me a little less happy.

  Wireless: 15Mbit/s

  Through the cable: 27Mbit/s

  Network information:

  The distance between the router and the computer laptop 3-4 meters

  Linksys WRT54GSv1.1 - Firmware Version: v4.71.4

  Network wireless - g only mode

  TV - 6 (because all the surrounding neighbor use 10-11, I noticed using Cain Abel & wireless discovered 4.9.29)

  Security: WPA2-Personal (TKIP + AES)

  All other settings are default (just reset to the factory settings).

  Laptop:

  Windows Vista Business SP1 32-bit

  Intel PRO/Wireless 3945ABG (installed the latest drivers from the website of intel, default settings)

  When you check the diagnostic of Intel tools, it tells me the link is 54 megabits and pushes meter packages of 54 megabits, while all lower speeds remain the same.

  More diagnostic information:

  Percent missed beacons: 0

  Percent transmit errors: 18

  Current Tx power: ~ 32 mW (100%)

  Supported power levels: 1.0 mW - 32.0 mW.

  Hope someone can help me here.

  Thanks in advance!

  Kind regards

  Ski Klesman

  Although wireless g "connects" to 54 Mbit/s, the maximum possible wireless "data rate" (in ideal laboratory conditions) is only about 20 to 25 Mbit/s.  Unfortunately, the phrase "in ideal laboratory conditions" generally excludes home intrusion!

  The aerial transmission for wireless connections is higher than for wired connections.   Thus, most individuals find that their Wi - Fi connection works at 50% to 70% of their speed of wired (LAN).  Your wired LAN being 27 Mbps connection speed, your 15 Mbps wireless speed is within normal limits.

  You might be able to tweak a bit more speed from your wireless network by optimizing all your wireless settings.  Here are a few suggestions:

  I guess you want actually to WPA2 encryption.  If so, set to AES only.   When you set the router to TKIP and AES, you actually tell the router to accept a WPA or WPA2 connection.

  Also, give your network a unique SSID. Do not use "linksys". If you use "linksys", you can try to connect the router to your neighbor. Also set 'SSID Broadcast' to 'active '. This will help your computer to find and lock on the signal from your router.

  Bad wireless connections are often caused by interference from other 2.4 GHz devices. This includes cordless phones, baby monitor wireless, microwave ovens, wireless mice and keyboards, wireless speakers and wireless network from your neighbor. In rare cases, Bluetooth devices can interfere. Even some 5 + GHz phones also use the 2.4 Ghz band. disconnect these devices and see if that solves your problem.

  In your router, try another channel. There are 11 channels in the band of 2.4 GHz channel 1, 6 or 11 generally works better. Discover your neighbors and see what channel they use. Because the channels overlap, try to stay at least + 5 or - 5 channels of your more powerful neighbors. For example, if you have a powerful neighbour on channel 9, try any channel 1 to 4.

  Also, try putting the router about 4 to 6 feet above the ground in an open area. Do not place behind your screen or other computer equipment or speakers. The antenna must be vertical.

  In addition, in the computer, go to your wireless software and go to 'Favorite networks' (sometimes called 'Profiles'). There are probably a few listed networks. Remove any network called "linksys". Also remove any network that you don't recognize or that you no longer use. If your current network is not listed, enter its information (SSID, encryption (if any) and key (if any)). Select your current network and make your network by default, then set it to auto login. You may need to go to 'settings' to do this, or you may need to right click on your network and select 'Properties' or 'settings '.

  If you continue to have problems, try the following:

  For wireless g routers, try setting the "baud rate" at 54 Mbps.

  If you still have problems, download and install the latest firmware for your router. After an update of the firmware, you must reset the default router, and then configure the router again from scratch. If you have saved a router configuration file, DO NOT use it.

  I hope this helps.

• Dv6 notebook with atheros 9285 Wireless does not

  model: pavilion dv6-3052

  operating system: win7 HP SP1 x 64-bit

  My 640 GB HARD drive failed and was replaced by a 500 GB seagate we. Since I had lost my recovery disks, installed real win7x64 bits.

  WiFi adapter: atheros 9285

  problem: wifi connection fails more than one meter of the router at home or elsewhere

  Troubleshooting does not help you

  my technical expertise is intermediate at best

  Here is the download link for the new version of card Wifi Atheros v9.2.0.480

  http://www.sendspace.com/file/yjo4ig

  I downloaded the file on the link above.

  Uninstall any previous version of this driver in Device Manager and download the file and then unpack it using winrar or another zip utility and open the folder and double-click SETUP. EXE to start the instalation.

  Driver WiFi Atheros AR5xxx/9xxx
  Date: 10/01/2012 Version: 9.2.0.480
  Size: MB 27,33 provider: Atheros Communications Inc.

  Operating systems:
  Windows Vista
  Windows Vista x 64
  Windows 7
  Windows 7 x 64

  Detailed description:
  Not available

  Devices supported below:
  11 a/b/g Wireless LAN Mini PCI adapt II
  11 a/b/g Wireless LAN Mini PCI Express fit
  11 a/b/g/n Wireless LAN Adapter
  11 a/b/g/n Wireless LAN Mini-PCI Express Adapter
  11 b/g Wireless LAN Mini PCI adapt
  11 b/g Wireless LAN Mini PCI Express fit
  11 b/g Wireless LAN Mini PCI Express adapt II
  11 b/g Wireless LAN Mini PCI Express card III
  11 b/g/n Wireless LAN Mini-PCI Express Adapter
  11 b/g/n Wireless LAN Mini-PCI Express Adapter II
  11 b/g/n Wireless LAN Mini-PCI Express Adapter III
  Allied Telesyn AT-WCC201g wireless card Bus Adapter
  Allied Telesyn AT-WCP201g Wireless PCI adapter
  Askey WLAN and BT combo card
  Atheros 802.11 a/b/g/n Dualband Wireless Network Module
  WB - EG Atheros AR1111 wireless network adapter
  Atheros AR1111 wireless network adapter
  Atheros AR2427 wireless network adapter
  Atheros AR5005G wireless network adapter
  Atheros AR5006 802.11a/b/g WiFi adapter
  Atheros AR5006EG Wireless Network adapt
  Atheros AR5006EGS wireless network adapter
  Atheros AR5006EX wireless network adapter
  Atheros AR5006EXS wireless network adapter
  Atheros AR5006G Wireless Network adapt
  Atheros AR5006GS wireless network adapter
  Atheros AR5006X wireless network adapter
  Atheros AR5006XS wireless network adapter
  Atheros AR5007 802. 11 b / g WiFi adapt
  Atheros AR5007EG Wireless Network adapt
  Atheros AR5007G wireless network adapter
  Atheros AR5008 Wireless Network adapt
  AR5008WB-EG Atheros wireless network adapter, #1
  AR5008WB-EG Atheros wireless network adapter, #2
  Atheros AR5008X Wireless Network adapt
  Atheros AR5009 802.11a/g/n WiFi adapt
  Atheros AR5B116 wireless network adapter
  Atheros AR5B125 wireless network adapter
  Atheros AR5B91 Wireless Network adapt
  Atheros AR5B93 wireless network adapter
  Atheros AR5B95 wireless network adapter
  Atheros AR5B97 Wireless Network adapt
  Atheros AR5BMD225 wireless network adapter
  Atheros AR5BWB225 wireless network adapter
  Atheros AR9002WB wireless network adapter
  Atheros AR9002WB-1NG wireless network adapter
  AR9002WB-1NG Atheros #1 wireless network adapter
  AR9002WB-1NG Atheros #2 wireless network adapter
  AR9002WB-1NG Atheros #4 wireless network adapter
  AR9002WB-2NG Atheros wireless network adapter
  Atheros AR9227 wireless network adapter
  Atheros AR922X wireless network adapter
  Atheros AR9280 wireless network adapter
  Atheros AR9281 802.11b/g/n WLAN HMC network
  Atheros AR9281 wireless network adapter
  Atheros AR9283 wireless network adapter
  Atheros AR9285 802.11b/g/n WiFi adapt
  Atheros AR9285 wireless network adapter
  Atheros AR9287 802.11b/g/n WiFi adapt
  Atheros AR9287 wireless network adapter
  Atheros AR928x Wireless Network adapt
  Atheros AR928X Wireless Network adapt
  Atheros AR9380 802.11a/g/n WiFi adapt
  Atheros AR9382 802.11a/g/n WiFi adapt
  Atheros AR938x wireless network adapter
  Atheros 802.11b/g/n WiFi AR9485 adapt
  Atheros AR9485 wireless network adapter
  AR9485WB-EG Atheros wireless network adapter
  Atheros AR9580 wireless network adapter
  Network wireless Atheros Osprey emulation adapter
  Osprey Simulation Atheros wireless network adapter
  Osprey Atheros wireless network adapter
  Atheros wireless network adapter
  Belkin N1 Wireless Notebook Card
  1535 Dell Wireless N wireless adapter
  D - Link AirPlus DWL - G520 Wireless PCI Adapter(rev.) (B)
  D - Link AirPlus DWL - G650 Wireless Cardbus Adapter(rev.) (C)
  D-Link AirPremier DWL-AG530 Wireless PCI adapter
  D-Link AirXpert DWL-AG520 Wireless PCI adapter
  D - Link DWA - 547 RangeBooster N650 Desktop network card
  D-Link DWA - 552 Desktop XtremeN adapt
  D-Link DWA - 556 Xtreme N PCIe Desktop adapt
  D-Link DWA - 643 RangeBooster N Notebook ExpressCard adapt
  D-Link DWA - 645 RangeBooster N650 Notebook adapt
  D-Link DWA - 652 XtremeN Notebook adapt
  D-Link RangeBooster N
  D-Link RangeBooster N 650
  NIC D - Link WDA - 1320 Desktop
  NIC D - Link WDA - 2320 Desktop
  D-Link Wireless 108 G DWA - 520 Desktop network card
  D-Link Wireless 108 G DWA-620 Notebook adapt
  D-Link Xtreme N
  Foxconn 802.11 a/b/g/n wireless adapter system
  Gigabyte GN-WI01GT (mini) PCI-E card WLAN
  Gigabyte GN-WI01HT (mini) PCI WLAN Card
  Gigabyte GN-WI03N (mini) PCI WLAN Card
  Gigabyte GN-WI06N (mini) PCI Express WLAN Card
  Gigabyte GN-WI07HT (mini) PCI-E card WLAN
  Gigabyte GN-WIAG/GN-WPEAG (mini) PCI WLAN Card
  Gigabyte GN-WIAH (mini) PCI WLAN Card
  Gigabyte GN - WLMA102 Cardbus WLAN card
  Gigabyte GN - WM01GT Cardbus WLAN card
  Gigabyte GN - WM02N Express card WLAN
  Gigabyte GN - WMAG Cardbus WLAN card
  Gigabyte GN-WP01GT (mini) PCI WLAN Card
  Gigabyte GN-WP02N PCI Express WLAN Card
  Gigabyte GN-WS50G (mini) PCI-E card WLAN
  Gigabyte GN-WS53HN Wireless LAN Mini PCI Express fit
  Gigaset PC Card 108
  Gigaset PC Card 300
  HP 802.11a/b/g Wireless Network adapt
  HP 802. 11b / g Wireless Network adapt
  IEEE 802. 11a / g Wireless LAN adapt (A)
  LAN adapter wireless WHG-AGDN/CB I - O DATA
  LAN-Express AS IEEE 802. 11a / g miniPCI adapt
  LAN-Express AS IEEE 802.11 g miniPCI adapt
  LAN-Express AS IEEE 802.11 g PCI-E fit
  Linksys Dual-Band Wireless A + G PCI adapt
  Linksys Wireless A + G Notebook adapt
  Linksys Wireless A + G PCI adapt
  Linksys Wireless-G Notebook adapt
  NETGEAR 108 Mbps Wireless PC Card WG511T
  NETGEAR 108 Mbps Wireless PCI adapt WG311T
  NETGEAR Double 108 Mbps Wireless card WG511U PC
  NETGEAR RangeMax Wireless PC Card WPN511
  WN711 NETGEAR RangeMax Wireless - N Expresscard adapter
  Option GTM67x PCIe WiFi adapter
  Speedport Gigaset 54Mbps
  TP-LINK 11 a/b/g wireless adapter
  TP-LINK 11 b/g wireless adapter
  Adapter for Wireless N 150 Mbps TP-LINK
  TP-LINK 300Mbps Wireless N adapter
  TP-LINK wireless adapter
  N TP-LINK wireless adapter
  Through the 802.11b/g/n PCIe wireless network adapter
  WG - 311 T 802. 11b / g 108 MB/s wireless adapter
  WNC CM9 Wireless LAN mini-PCI Network adapt
  WPN311 RangeMax Wireless PCI adapt

• Inspiron 530 Win XP Home does not start with the TrendNet wireless card

  I just received 5/1 a refurbished Inspiron 530 530 Mini-Tower desktop: Intel Core 2 Quad processor Q6600 (8 MB L2 cache, 2.4 GHz, 1066FSB) Genuine Windows XP Home Edition. The PC didn't have any LAN card and I intend to use a working adapter TrendNet (COMPUSA) 54 Mbps Wireless G PCI I used very well with my old 4300 Dim run also Win XP Home. However, after that I booted up the new PC with the first series, I stopped him. I then opened and installed the card wireless in one of the 2 empty PCI slots. When I turned on the PC, surprise! The PC wouldn't start - it kept beeping with the glowing orange of front power button and turn off every two seconds, I then read the Inspiron 530 manual means that the motherboard has detected an error. Hello. I checked.

  I searched other posts in this forum and I've seen a few references to the boot configuration verification. However, installation of starting my PC doesn't have an option related to the wireless adapter.

  Someone help me please fix this error. I intend to reconnect the card on my old PC wireless again and start just to prove that the card is always good. I only removed a card video of him and the rest of the asis. (I've not carpet in my house is that reduces my chances to have fried the card when you remove or install.) I also touch the chassis of the PC before doing anything.)

  
  

• Why is my slower than wifi ethernet download speed when using the airport extreme?

  Hi all

  This is my first post here, so please bear with me. I currently own stunted 2011 Macbook Pro 13 inch and an extreme A1521 from the airport. My ISP has promised 50Mbps downloading and sending 10 Mbps. When I connect my MPro via ethernet/wi-fi to my modem I get as promised. When I connect my MPro via wi - fi to the extreme I get 48Mbps download download 9Mbps and it's ok. However, when I connect my MPro via ethernet to extreme I get 8-9Mbps download and 9Mbps. Anyone know how to fix this?

  If you check the 'fine print', your ISP has promised "up to" 50 Mbit/s and 'up to' 10Mbps.  The ISP might provide more than that during periods of slow activity, like the days of the week during the day, but much less during evenings when there are many more users on the Internet.

  When I connect my MPro via ethernet/wi-fi to my modem I get as promised

  I assume that you meant to check the Ethernet connection, you disable WiFi on Mac when you do this. And unplug the Ethernet cable when you check the speed of the WiFi, correct?

  If so, this tells you that the Ethernet port to both the modem and the Mac work properly, and WiFi work correctly as well.

  When I connect my MPro via wi - fi to the extreme I get 48Mbps download download 9Mbps and it's ok.

  If this tells you that the Ethernet connection between the modem and the AirPort Extreme works correctly, and wireless works fine on the AirPort Extreme.

  However, when I connect my MPro via ethernet to extreme I get 8-9Mbps download and 9Mbps.

  Well, you know that the Ethernet connection between the modem and AirPort Extreme works because you can register 48 Mbps Wireless.

  Thus, the possibilities are narrowed to two elements at this stage:

  (1) the Ethernet cable is defective or making intermittent contact. Try another Ethernet cable, to ensure.

  (2) If you have turned off AirPort Extreme and rebooted several times, and you know that the cable between the Mac and AirPort Extreme works properly, then you have reduced the question down to the Ethernet on the AirPort Extreme, which is probably defective switch.

  If you have not already done so, try other ports Ethernet on the AirPort Extreme.

  As a last resort, perform a reset material on AirPort Extreme and put up again. To perform the Hard Reset... power on AirPort Extreme for a few minutes, then hold it pushed in the reset button on the back of the unit (near the AC power plug) for 7-8 seconds and release. Allow a minute for the AirPort Extreme restart orange light flashing slow.

  I once went through two consecutive airport extremes with the same question about 8 months ago, so it can happen.

  If you're still having problems, then it is time to take the AirPort Extreme of Apple Store... If you have one near you... or contact the Apple Support directly by clicking on 'Contact the Support' in the upper right area of this web page.

  Good luck!