ด้วยว่าผู้ใช้แลนไร้สายซึ่งเกมส์แจ้งว่ามีระดับสัญญาณอ่อน คุณๆจะเสียความเร็วและความเชื่อถือได้ (reliability)ในการสื่อสารข้อมูลไป ทั้งพื้นที่บางส่วนอาจไม่สามารถเชื่อมโยงเครือข่ายได้ ผมขอนำเกร็ดวิชาในการเพิ่มสัญญาณมาฝากเพื่อบวกสมรรถนะ (performance) ของแลนไร้สาย ดังนี้
1. ติดตั้ง AP (Access Point) เก็บที่ใจกลางอาณาที่ซึ่งท่านใช้งาน โดยมองทั้ง 3 มิติ เช่น บ้านมี 2 ชั้น ก็พึงจะติดตั้งให้ลอยสูงจากหน้าดินและอยู่ตรงกลางของพื้นราบ เช่น บันได เป็นต้น ไม่ควรจัดตั้งชิดผนัง หรือใกล้สิ่งกีดขวาง เช่น ตู้เหล็กเก็บแฟ้ม เป็นต้น
2. เลือกเสาอากาศของ AP ให้สมกับพื้นที่ เช่น เสามาตรฐาน (Standard antenna) ติดตั้งไว้ที่ใจกลางอาณาบริเวณซึ่งท่านใช้งาน ถ้าติดตั้งที่ผนังซึ่งอีกด้านไม่ใช่อาณาบริเวณชองท่าน ควรใช้ Hi-gain antenna
3. เกลี่ยกำลังส่งของเสาอากาศ (Antenna transmit power) ให้งอกงาม
4. ใช้ AP จำนวนยิ่งกว่าเดิมและปรับให้ใช้เป็นเครื่องทวนสัญญาณ (repeater) เข้าประจำที่ไว้กลางระยะทาง
5. แลนไร้สายใช้วิธีผลัดกันรับ/ส่ง กล่าวคือ เครื่องคอมพิวเตอร์ส่งสัญญาณวิทยุมา AP จะเป็นผู้รับสัญญาณเท่านั้น จนกระทั่งเครื่องคอมพิวเตอร์ส่งเสร็จ AP จะส่งสัญญาณวิทยุไปบ้างซึ่งเครื่องคอมพิวเตอร์จะเป็นผู้รับสัญญาณเท่านั้น การที่สัญญาณอ่อนจึงต้องพิจารณาปรับปรุงการ์ดแลนไร้สาย (wireless network adapter) ของเครื่องคอมพิวเตอร์ด้วย โดยอาจเลือกเชื่อมต่อการ์ดใหม่ด้วย USB แต่กรณีคอมพิวเตอร์วางตัก (laptop) ยี่ห้อดังๆ สินค้า แบรนด์เนม ที่ใช้งานไม่นาน (ไม่เกิน 1 ปี) จะมีการ์ดแลนไร้สาย (wireless network adapter) คุณภาพดีอยู่แล้ว
6. เปลี่ยน wireless channel ที่ AP โดยทั่วไปควรเลือกใช้ช่อง (channel) 1, 6 และ 11 เพราะสัญญาณจะไม่กวนกัน ดูว่าช่องไหนให้สัญญาณดีกว่า ซึ่งเราต้องดูว่า AP เพื่อนบ้านเขาใช้ช่องไหนอยู่ หลีกเลียงอย่าใช้ซ้ำกันครับ หลักการคล้ายกับการฟังวิทยุเลือกช่องที่ชัดเจนครับ มีข้อควรระวัง ห้ามเลือกช่อง 12,13 และ 14 เพราะเครื่องคอมพิวเตอร์อาจไม่รองรับมาตรฐานญี่ปุ่น แล้วท่านจะต้องต่อสายแลนไปคอนฟิกช่องใหม่ (ใช้แลนไร้สายไม่ได้)
7. ไม่ใช้อุปกรณ์อื่น เช่น โทรศัพท์ไร้สาย ที่ใช้สัญญาณวิทยุที่มีความถี่ใกล้เคียงกับแลนไร้สาย เช่น 802.11a ใช้ความถี่ 5.8 GHz, 802.11b ใช้ความถี่ 2.4 GHz หรือ 802.11g ใช้ความถี่ 2.4 GHz เป็นต้น
8. ปรับปรุง firmware ของ AP และไดร์เวอร์ (driver) ของการ์ดแลนไร้สายที่ติดตั้งลงบนเกมส์ เช่น ผมได้ปรับปรุง firmware ของ D-Link 2640T เป็น Current Firmware Version : V3.02B01T01.EU-A.20080725
9. ควรเลือกกินอุปกรณ์เครือข่ายยี่ห้อเดียวกัน จะเกื้อกูลกัน เพราะแต่ละบริษัทมีเทคโนโลยีต่างกัน
10. เลือกใช้ 802.11g เทคโนโลยีใหม่ เร็วกว่า ที่มี backward-compatible กับ 802.11b
http://game.numsai.com
Wireless Info
2010-11-01
WNDR3400 N600 - High Performance Wireless Router for Gaming and Streaming
Gaming and video streaming demand high-performance router. The router must be able to deliver high-speed for smooth gaming response, jitter-free, and lag-free. This should also apply to High Definition video streaming, no other data traffic can disturb the performance of the router while you are experiencing the gaming and streaming.
2010-10-25
Defacto Wireless Distribution LLC Announces the New AirMatrixHigh Power Outdoor
The AirMatrix Home 14 HP is the perfect CPE solution. By utilizing Pacific Wireless's 14 dBi low profile Rootenna and the router functionality of AirMatrixOS software, AirMatrix has created a rock solid 250 mW CPE that delivers higher performance and greater functionality than other CPE solutions. AirMatrix Home 14 HP is also an incredibly cost-effective solution.
2009-06-14
3 Tips for Sending Special Messages
Staying in touch with family and friends has never been easier with the speed and efficiency of today's technology. We live in a world of e-mail, text and instant messages and mobile conversations.
While such options make it easy to stay in touch, these technologies have also lessened the emotional aspect of our communications.
Here are a few suggestions on how to use technology to stay close to loved ones and, at the same time, bring back the personal element in your communications.
* Send a personal DVD message. Now you can give the gift of vivid, colorful memories by creating personalized DVD messages for your friends and family. It's a fast, easy and fun way to stay in touch.
Can't make it to your high school reunion? Use a Sony DVD Handycam camcorder to record a special message to old classmates. You can even get special Sony DVD mail envelopes to share your discs.
Encourage friends and family to reciprocate. When you receive their DVDs, just pop them into your player as you would a movie.
* Make a Webcam chat date. A picture tells a thousand words, but real-time video speaks volumes. While nothing can replace an in-person conversation, you can get awfully close to the real thing with a Webcam chat.
Gather your loved ones in front of the Webcam to talk, view photos or share advice.
First time carving the turkey? Get Dad on the Webcam - he can probably walk you through it. Schedule your chat on a special occasion - perhaps on a birthday or holiday - and don't forget to plan your next one. You can even make it an annual event.
* Create a video file on your digital still camera. Forgot your mom's birthday or couldn't attend your child's school play? Send your loved ones a video clip so that they'll know how much you care.
Be creative, shake things up and share your ideas. It's never been so easy to "be there when you're not." - NU
'No Audio Device' Error
If you have experienced a Windows "No Audio Device" error, it most likely means that your sound card is not installed properly। Even though other problems can cause this error, an improperly installed sound card is the most common reason. If the audio card isn't properly connected in the motherboard or you do not have an audio controller connected, you will get this error. Also, it is possible that the device you are trying to use is not compatible to the motherboard you are using. Troubleshooting the most common errorHere are a few steps to take to solve the most common error, an improperly installed card:You will first need to find your audio controlling device or controller. This controller is what gives you the ability to adjust the sound for everything. From your start menu, go to your control panel. Then, go to add hardware and search for the hardware yourself. Don't let the computer search for it automatically, because if it is improperly installed it may not be seen. Then, scroll down to sound devices and search for your audio controller. Check the properties of the device, and see if it is installed properly. If it isn't installed properly you will see a yellow highlighted question mark beside the device's name• The best way to solve this problem is to uninstall your sound card and drivers. You will reboot, enter the bios, disable the onboard audio, game port, and midi. Then boot back into windows, go to add remove programs and make sure that any programs for the device was removed.Next, you should reinstall the sound card and drivers. It is possible driver updates have been made since the sound card was manufactured and released, so it is a good idea to visit the manufacturer's site and see if there are driver updates. Once you do this, restart the computer again. The problem is (more than likely) the default device in audio properties is still the onboard, you can select the creative devices and it will probably work, but it will be better to disable the onboard all together.Uninstalling and reinstalling the sound card will more than likely fix your problem.Other troubleshooting tipsIf you are still experiencing difficulties, try these other troubleshooting ideas.• If you think your sound card may be 'dead', before buying a new one, I would recommend borrowing one that is fully functioning from a friend, if possible, and installing that one to see if the error is in the card itself.
• Try using a different PCi slot, that way windows may detect it as new instead of trying to reconfigure it on the slots its currently on. This can also help you to determine whether one of the slots are bad.• If you have an onboard sound card but are trying to use a sound card you bought separately, ensure the onboard one is disabled.Always ensure the sound card you purchase is compatible with your board. If it doesn’t say on the packaging, do a little research online prior to the purchase.
तेग : 'No Audio Device' Error
Como Encontrar Pareja si Estas Solo o Sola
Encontrar pareja es algo no tan fแcil de hacer. Todo depende en las posibilidades y opciones de cada uno. Como buscar departamento por ejemplo, requiere saber como buscar, en que sitios, en que inmobiliarias, etc.
En el caso de una pareja, es importante tener en claro a donde buscar. Los sitios en Internet se han convertido en una de las mejores opciones en los ๚ltimos a๑os de su popularidad. Gente como vos y yo que no encuentran al amor de su vida, encuentran en sitios para conocer gente en lํnea muchas opciones que en la vida cotidiana no pueden o no pretenden buscar.
La ventaja principal de estos sitios es que te permiten dejar atrแs muchos prejuicios que llevamos a la hora de encontrarnos con alguien cara a cara. No te importa decir lo que piensas o enfrentar a alguien que quieres porque sabes que no pierdes nada si lo haces, solo puedes ganar.
Los sitios tambi้n son divididos en inter-grupos, es decir si eres de alguna religi๓n o origen ้tnico, nacionalidad, hobbies, preferencias sexuales, etc. Si buscas a alguien que sea como tu, en los sitios de Internet lo puedes encontrar.
Otro de los beneficios de encontrar pareja en lํnea, es que lo puedes hacer en cualquier momento del dํa, desde cualquier computadora que desees. Si no puedes dormir, y estas sin nada que hacer, sabes que hay alguien del otro lado del monitor que se encuentra igual que ti. Puede ser en tu ciudad, o en cualquier otro lugar del mundo. Es tambi้n una manera muy prometedora para abrir tu mente y conocer otras culturas fuera de la tuya.
He oํdo muchas historias de parejas amigas que se conocieron por Internet en sitios como JDate, Date.com, y otros. Algunos viven juntos, otros estแn casados y muy felices, otros por supuesto no funcionaron pero lo intentaron.
Especialmente para aquellos que trabajan hasta tarde, y no tienen tiempo de salir a bares y conoces a alguien hacerlo en lํnea es ideal. (Especialmente sabiendo que en bares, la mayorํa de la gente busca solo encuentros cortos de una noche, y no mas que eso.)
Otra de las ventajas de estos sitios es que la mayorํa de los que estแn alistados realmente buscan pareja y no solo una noche de diversi๓n. Algunos buscan solo diversi๓n, pero encontraran a otros alistados en la misma secci๓n, sin decepcionar a los que buscan pareja. Es todo muy organizado y fแcil de llevar a cabo.
Este sistema es desde ya un gran cambio para los mayores de 40, que estaban acostumbrados a otro tipo de interacci๓n para encontrar pareja. Sin embargo, no hay duda que Internet hace este proceso mucho mas fแcil y posible para muchos. Pru้balo y veras!
En el caso de una pareja, es importante tener en claro a donde buscar. Los sitios en Internet se han convertido en una de las mejores opciones en los ๚ltimos a๑os de su popularidad. Gente como vos y yo que no encuentran al amor de su vida, encuentran en sitios para conocer gente en lํnea muchas opciones que en la vida cotidiana no pueden o no pretenden buscar.
La ventaja principal de estos sitios es que te permiten dejar atrแs muchos prejuicios que llevamos a la hora de encontrarnos con alguien cara a cara. No te importa decir lo que piensas o enfrentar a alguien que quieres porque sabes que no pierdes nada si lo haces, solo puedes ganar.
Los sitios tambi้n son divididos en inter-grupos, es decir si eres de alguna religi๓n o origen ้tnico, nacionalidad, hobbies, preferencias sexuales, etc. Si buscas a alguien que sea como tu, en los sitios de Internet lo puedes encontrar.
Otro de los beneficios de encontrar pareja en lํnea, es que lo puedes hacer en cualquier momento del dํa, desde cualquier computadora que desees. Si no puedes dormir, y estas sin nada que hacer, sabes que hay alguien del otro lado del monitor que se encuentra igual que ti. Puede ser en tu ciudad, o en cualquier otro lugar del mundo. Es tambi้n una manera muy prometedora para abrir tu mente y conocer otras culturas fuera de la tuya.
He oํdo muchas historias de parejas amigas que se conocieron por Internet en sitios como JDate, Date.com, y otros. Algunos viven juntos, otros estแn casados y muy felices, otros por supuesto no funcionaron pero lo intentaron.
Especialmente para aquellos que trabajan hasta tarde, y no tienen tiempo de salir a bares y conoces a alguien hacerlo en lํnea es ideal. (Especialmente sabiendo que en bares, la mayorํa de la gente busca solo encuentros cortos de una noche, y no mas que eso.)
Otra de las ventajas de estos sitios es que la mayorํa de los que estแn alistados realmente buscan pareja y no solo una noche de diversi๓n. Algunos buscan solo diversi๓n, pero encontraran a otros alistados en la misma secci๓n, sin decepcionar a los que buscan pareja. Es todo muy organizado y fแcil de llevar a cabo.
Este sistema es desde ya un gran cambio para los mayores de 40, que estaban acostumbrados a otro tipo de interacci๓n para encontrar pareja. Sin embargo, no hay duda que Internet hace este proceso mucho mas fแcil y posible para muchos. Pru้balo y veras!
2009-04-21
Wireless Range Extender
Linksys WRE54G Wireless Range Expander
Linksys WRE54G Wireless Range Expander
A wireless range extender increases the distance over which a WLAN signal can spread, overcoming obstacles and enhancing overall network signal quality. Several different forms of wireless range extenders are available. These products are sometimes called "range expanders" or "signal boosters." The Linksys WRE54G (compare prices) 802.11g Wireless Range Expander is shown above. A wireless range extender works as a relay or network repeater, picking up and reflecting WiFi signals from a network's base router or access point. The network performance of devices connected through a range extender will generally be lower than if they were connected directly to the primary base station.
A wireless range extender connects wirelessly to a WiFi router or access point. However, due to the nature of this technology, most wireless range extenders work only with a limited set of other equipment. Check the manufacturer's specifications carefully for compatiblity information.
Linksys WRE54G Wireless Range Expander
A wireless range extender increases the distance over which a WLAN signal can spread, overcoming obstacles and enhancing overall network signal quality. Several different forms of wireless range extenders are available. These products are sometimes called "range expanders" or "signal boosters." The Linksys WRE54G (compare prices) 802.11g Wireless Range Expander is shown above. A wireless range extender works as a relay or network repeater, picking up and reflecting WiFi signals from a network's base router or access point. The network performance of devices connected through a range extender will generally be lower than if they were connected directly to the primary base station.
A wireless range extender connects wirelessly to a WiFi router or access point. However, due to the nature of this technology, most wireless range extenders work only with a limited set of other equipment. Check the manufacturer's specifications carefully for compatiblity information.
Wireless Internet Video Cameras
Linksys WVC54G Wireless Internet Video Cameralinksys.com
A wireless Internet video camera allows video (and sometimes audio) data to be captured and transmitted across a WiFi computer network. Wireless Internet video cameras are available in both 802.11b and 802.11g varieties. The Linksys WVC54G (compare prices) 802.11g wireless camera is shown above.
Wireless Internet video cameras work by serving up data streams to any computer that connects to them. Cameras like the one above contain a built in Web server. Computers connect to the camera using either a standard Web browser or through a special client user interface provided on CD-ROM with the product. With proper security information, video streams from these cameras can also be viewed across the Internet from authorized computers.
Wi-Fi Internet video cameras can be connected to a wireless router using either an Ethernet cable or wirelessly. These products include setup software on a CD-ROM that must be installed on one computer to complete initial Wi-Fi configuration of the device.
Features that distinguish different wireless Internet video cameras from each other include:
resolution of the captured video images (for example, 320x240 pixel, 640x480 pixel, and other image sizes)
motion sensors, and the ability to send email alerts when new activity is detected and captured
ability to timestamp images
built-in microphones and/or jacks for external microphones, for audio support
types of WiFi security supported, such as WEP or WAP
Wireless Internet video cameras work by serving up data streams to any computer that connects to them. Cameras like the one above contain a built in Web server. Computers connect to the camera using either a standard Web browser or through a special client user interface provided on CD-ROM with the product. With proper security information, video streams from these cameras can also be viewed across the Internet from authorized computers.
Wi-Fi Internet video cameras can be connected to a wireless router using either an Ethernet cable or wirelessly. These products include setup software on a CD-ROM that must be installed on one computer to complete initial Wi-Fi configuration of the device.
Features that distinguish different wireless Internet video cameras from each other include:
resolution of the captured video images (for example, 320x240 pixel, 640x480 pixel, and other image sizes)
motion sensors, and the ability to send email alerts when new activity is detected and captured
ability to timestamp images
built-in microphones and/or jacks for external microphones, for audio support
types of WiFi security supported, such as WEP or WAP
Wireless Game Adapters
A wireless game adapter connects a video game console to a Wi-Fi home network to enable Internet or head-to-head LAN gaming. Wireless game adapters for home networks are available in both 802.11b and 802.11g varieties. An example of an 802.11g wireless game adapter appears above, the Linksys WGA54G (compare prices). Wireless game adapters can be connected either to a wireless router using an Ethernet cable (for best reliability and performance) or over Wi-Fi (for greater reach and convenience). Wireless game adapter products include setup software on a CD-ROM that must be installed on one computer to complete initial configuration of the device. As with generic network adapters, wireless game adapters must be configured with the correct network name (SSID) and encryption settings.
A wireless print server allows one or two printers to be conveniently shared across a WiFi network. Wireless print servers for home networks generally are available in both 802.11b and 802.11g varieties. Wireless print servers offer the following advantages:
Allows printers to be conveniently located anywhere within wireless network range, not tied to the location of computers Does not require a computer be always turned on in order to print Does not require a computer to manage all print jobs, that can bog down its performance Allows administrators to change computer names and other settings without having to re-configure the network printing settings. A wireless print server must be connected to printers by a network cable, normally USB 1.1 or USB 2.0. The print server itself can connect to a wireless router over WiFi, or it can be joined using an Ethernet cable.
Most print server products include setup software on a CD-ROM that must be installed on one computer to complete the initial configuration of the device. As with network adapters, wireless print servers must be configured with the correct network name (SSID) and encryption settings. Additionally, a wireless print server requires client software be installed on each computer needing to use a printer.
The Linksys WPS54G (compare prices) 802.11g USB wireless print server is shown. Print servers are very compact devices that include a built-in wireless antenna and LED lights to indicate status.
Allows printers to be conveniently located anywhere within wireless network range, not tied to the location of computers Does not require a computer be always turned on in order to print Does not require a computer to manage all print jobs, that can bog down its performance Allows administrators to change computer names and other settings without having to re-configure the network printing settings. A wireless print server must be connected to printers by a network cable, normally USB 1.1 or USB 2.0. The print server itself can connect to a wireless router over WiFi, or it can be joined using an Ethernet cable.
Most print server products include setup software on a CD-ROM that must be installed on one computer to complete the initial configuration of the device. As with network adapters, wireless print servers must be configured with the correct network name (SSID) and encryption settings. Additionally, a wireless print server requires client software be installed on each computer needing to use a printer.
The Linksys WPS54G (compare prices) 802.11g USB wireless print server is shown. Print servers are very compact devices that include a built-in wireless antenna and LED lights to indicate status.
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