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toh:buyerguide [2014/03/02 17:12]
megaman_player
toh:buyerguide [2014/10/26 23:37] (current)
pablog
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 ==== LAN ==== ==== LAN ====
-    * **How many [[wp>​Network interface controller|NICs]]** does the [[wp>​System on a chip]] incorporate?​ Common are **one** or **two**, very seldom more.\\ These are implemented as [[doc/​hardware/​SoC]]-integrated Ethernet-[[wp>​Media access control|MAC]]-blocks,​ which are each connected over a [[wp>​Media Independent Interface|xMII]] to a distinct [[wp>PHY (chip)]].+    * **How many [[wp>​Network interface controller|NICs]]** does the [[wp>​System on a chip]] incorporate?​ Common are **one** or **two**, very seldom more.\\ These are implemented as [[doc/​hardware/​SoC]]-integrated Ethernet-[[wp>​Media access control|MAC]]-blocks,​ which are each connected over a [[wp>​Media Independent Interface|xMII]] to a distinct [[wp>PHY (chip)]].\\ **''​Note:''​** Do not confuse the number of Ports with the number of NICs.
     * Which Ethernet-Layer-1 standard does the NIC/NICs support?\\ **BASE100-TX** (i.e. 100MBit/s, [[wp>​Fast Ethernet]]) or\\ **BASE1000-T** (i.e. 1000MBit/s, [[wp>​Gigabit Ethernet]])?​     * Which Ethernet-Layer-1 standard does the NIC/NICs support?\\ **BASE100-TX** (i.e. 100MBit/s, [[wp>​Fast Ethernet]]) or\\ **BASE1000-T** (i.e. 1000MBit/s, [[wp>​Gigabit Ethernet]])?​
     * Is there an **integrated Ethernet switch**?     * Is there an **integrated Ethernet switch**?
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 ==== Wireless ==== ==== Wireless ====
 (Please consult the [[doc:​howto:​wireless.overview|Wireless Overview]]) (Please consult the [[doc:​howto:​wireless.overview|Wireless Overview]])
-  * How many [[wp>​Wireless network interface controller|WNICs]]?​ Common are **one** or **two**.\\ These can be SoC-integrated, distinct chips and also [[wp>​MiniPCI]]/[[wp>​MiniPCIe]]-cards.+  * How many [[wp>​Wireless network interface controller|WNICs]]?​ Common are **one** or **two**. These can be 
 +    * SoC-integrated: this is commonly called WiSoC 
 +    * Onboard: the wifi chip is the same used in MiniPCI/e cards but soldered on the main PCB 
 +    * [[wp>​MiniPCI]]: the wifi card can be extracted, and replaced by another different MiniPCI model 
 +    * [[wp>​MiniPCIe]]: the wifi card can be extracted, and replaced by another different MiniPCIe model
   * Which substandards of the [[wp>​IEEE 802.11]]-family shall the wireless hardware support? Most common ones are 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac and 802.11s   * Which substandards of the [[wp>​IEEE 802.11]]-family shall the wireless hardware support? Most common ones are 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac and 802.11s
   * Capabilites:​ 1T1R, 2T2R, 3T3R or 2T3R ..   * Capabilites:​ 1T1R, 2T2R, 3T3R or 2T3R ..
   * Frequencies (or bands):   * Frequencies (or bands):
-      * 2.4 GHz or 5 GHz or both? (see e.g. [[wp>​Electromagnetic_interference_at_2.4_GHz|Electromagnetic interference at 2.4 GHz]] or [[wp>​Fresnel zone]] or [[http://​www.smallnetbuilder.com/​wireless/​wireless-basics/​31883-how-to-buy-a-wireless-router-2012-edition?​start=1|Throughput and Range]])+      * 2.4 GHz or 5 GHz or both? (see e.g. [[wp>​Electromagnetic_interference_at_2.4_GHz|Electromagnetic interference at 2.4 GHz]] or [[wp>​Fresnel zone]] or [[http://​www.smallnetbuilder.com/​wireless/​wireless-basics/​32316-how-to-buy-a-wireless-router-2014-edition?showall=&​start=1|Throughput and Range]])
       * For the AP to be capable to run in 2.4 GHz and 5 GHz at the same time, the router must support //<color green>​dual band simultan</​color>//​ aka //<color green>​DBDC (DualBand-DualConcurrent)</​color>//​. This tag shall help you find suitable devices more quickly: {{tag>​802.11abgn_simultan}}       * For the AP to be capable to run in 2.4 GHz and 5 GHz at the same time, the router must support //<color green>​dual band simultan</​color>//​ aka //<color green>​DBDC (DualBand-DualConcurrent)</​color>//​. This tag shall help you find suitable devices more quickly: {{tag>​802.11abgn_simultan}}
       * At 2,4GHz you only have **3** distinct channels without overlap, in the 5GHz band there are **19** (EU)/ **13** (USA)/ **??** (Japan) channels without overlapping available       * At 2,4GHz you only have **3** distinct channels without overlap, in the 5GHz band there are **19** (EU)/ **13** (USA)/ **??** (Japan) channels without overlapping available
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   * Do the current capabilities of the [[http://​wireless.kernel.org/​en/​users/​Drivers|Existing Linux Wireless drivers]] for your WNICs satisfy your requirements?​   * Do the current capabilities of the [[http://​wireless.kernel.org/​en/​users/​Drivers|Existing Linux Wireless drivers]] for your WNICs satisfy your requirements?​
   * Are the [[doc:​hardware:​antennae]] detachable? If so, you could replace them with ones with a better gain, or with (home-made) directional antennae.   * Are the [[doc:​hardware:​antennae]] detachable? If so, you could replace them with ones with a better gain, or with (home-made) directional antennae.
 +  * [[wp>​FLOSS]] drivers: this is very important for a correct wifi performance/​behavior. For years Broadcom didn't supply enough quality FLOSS drivers (or hardware specifications) and it seems won't ever happen, propietary wl drivers often causes crashes or incorrect behaviors, then avoid Broadcom'​s wifis. As recommended by many people, **Atheros or Ralink** wifis are probably the best choice.
  
 ==== Modem ====  ==== Modem ==== 
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   * Occasionally the computing power of the CPU proves to be a bottleneck. To compare you should have a look at the [[:​doc:​hardware:​cpu|CPU]] included on with [[:​doc:​hardware:​soc|SoC]]. Do not compare raw MHz, e.g. a MIPS 34KE@300MHz is in most scenarios faster then a MIPS 24K@400MHz.   * Occasionally the computing power of the CPU proves to be a bottleneck. To compare you should have a look at the [[:​doc:​hardware:​cpu|CPU]] included on with [[:​doc:​hardware:​soc|SoC]]. Do not compare raw MHz, e.g. a MIPS 34KE@300MHz is in most scenarios faster then a MIPS 24K@400MHz.
     * as you can see by referring to the [[doc:​techref:​flash.layout|flash layout]] with a total of 8MiB flash memory, you can use about 5MiB for own packages.     * as you can see by referring to the [[doc:​techref:​flash.layout|flash layout]] with a total of 8MiB flash memory, you can use about 5MiB for own packages.
 +
 +==== Cryptography ====
 +  * [[wp>​Hardware_random_number_generator|TRNG]]:​ Most devices use a software random number generator. Only few are equiped with a true hardware random number generator, see [[http://​wiki.openwrt.org/​tag/​trng?​do=showtag&​tag=TRNG|TRNG]] tag
 +  * [[doc/​hardware/​cryptographic.hardware.accelerators|Cryptographic Hardware Accelerators]]:​ routers equiped with these accelerators may bring you better speed transfers when you plan to use encrypted connections such as OpenVPN.
  
 ==== Ports ==== ==== Ports ====
-    * USB: connect a hub, harddiscs, network printers, ssds, usb sticks, UMTS modems, cameras, sound cards, etc. ->​[[doc:​howto:​usb.overview]]+    * USB: connect a hub, harddiscs, ssds, usb sticks, UMTS modems, cameras, sound cards, etc. ->​[[doc:​howto:​usb.overview]]
     * Serial: very useful for developers, limited uses for end users ->​[[doc:​hardware:​port.serial]]     * Serial: very useful for developers, limited uses for end users ->​[[doc:​hardware:​port.serial]]
     * JTAG: very useful for developers and also for end users  ->​[[doc:​hardware:​port.JTAG]]     * JTAG: very useful for developers and also for end users  ->​[[doc:​hardware:​port.JTAG]]
-    * [[wp>TAE connector|TAE sockets]]: a telephone connector+    * [[wp>TAE connector|TAE sockets]]: a telephone connector ​used mosly in Germany
  
 ==== Buttons ==== ==== Buttons ====
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 ===== Price comparison for currently purchasable hardware ===== ===== Price comparison for currently purchasable hardware =====
-==== Europe ==== 
 Since Christmas 2011, geizhals offers a filter for devices supported by OpenWrt: Since Christmas 2011, geizhals offers a filter for devices supported by OpenWrt:
   * [[http://​geizhals.at/?​cat=wlanrout&​sort=p&​xf=758_OpenWrt#​xf_top|Preisvergleich AT: WLAN-Router]]   * [[http://​geizhals.at/?​cat=wlanrout&​sort=p&​xf=758_OpenWrt#​xf_top|Preisvergleich AT: WLAN-Router]]
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 ==== United States ==== ==== United States ====
-Amazon also lets you search ​by open by Open-WRT: +Amazon also lets you //search// ​for OpenWrt, but you cannot filter for OpenWrt support
-  * [[http://amzn.to/​1dbqupL|Price comparison USAOpen-WRT routers]] +  * [[http://​amzn.to/​1mONYr0|Price comparison USA: OpenWrt ​routers]]
-  * [[http://​amzn.to/​1mONYr0|Price comparison USA: OpenWRT ​routers]]+
  
 **''​Note_1:''​** The filter is not 100% perfect, be sure to double check a router before buying \\ **''​Note_1:''​** The filter is not 100% perfect, be sure to double check a router before buying \\
 +
 +
 +
  
 ===== Tags ===== ===== Tags =====
 You could use the [[meta:​tags]] to quickly find the devices with your desired features. Sadly :-( not many devices have been tagged so far. You could use the [[meta:​tags]] to quickly find the devices with your desired features. Sadly :-( not many devices have been tagged so far.
  
-{{tag>​GigabitEthernet DetachableAntenna USB2.0 USB 128RAM 64RAM 32Flash 16Flash 8Flash 802.11abgn 802.11abgn_simultan 802.11ac rechargeable_battery}}+  * {{tag>​GigabitEthernet}}  
 +  * {{tag>DetachableAntenna}}  
 +  * {{tag>USB2.0 USB 2USB 3USB 4USB}} 
 +  * {{tag>​512RAM 256RAM ​128RAM 64RAM}} 
 +  * {{tag>​gt32Flash ​32Flash 16Flash 8Flash}} 
 +  * {{tag>802.11abgn 802.11abgn_simultan 802.11ac}} 
 +  * {{tag>rechargeable_battery}} 
 +  * {{tag>​portable_router}} 
 +  * {{tag>​ip_camera}} 
 +  * {{tag>​TRNG crypto}}
toh/buyerguide.1393776721.txt.bz2 · Last modified: 2014/03/02 17:12 by megaman_player