Article

Vizio VIA – Tablets with special features (photos) – CNET Reviews

My Comments

Previously, I thought that there would be very little that manufacturers can use to differentiate their Android tablet computers from one another. Typically, this will end up with the tablets working in the same way and having some sort of cosmetic difference.

Here, the customer would be able to think of a 7” model for the coat pocket or a 10” model for the briefcase or coffee table. They may be able to choose between the models that have Wi-Fi only or models that also have built-in- wireless broadband; as well as different memory capacities.

But some companies have worked further on this by making sure some of their tablet computers are able to stand out from the pack. In this article, Sony had a unit that used two screens in a similar vein to the Nintendo DS handheld games console while Vizio ran with a model that has an infrared emitter and universal remote-control app which would allow it to earn its place on the coffee table. As well, Panasonic had run with a ruggedised tablet that suits those environments that may yield rough treatment to the typical tablet device.

What I have seen of this is that there is a chance for manufacturers to try new features for the Android tablet platform and use these features to make their models different not just cosmetically but in a functional way.

Articles

What You Need To Know About IPv6 – PCWorld

My Comments

There has been a lot of talk about IPv6 as becoming the next major change for the Internet ecosystem.

This talk increased since late 2010 with the fact that the Internet is running out of globally-assignable IPv4 addresses, which are used to identify Internet services to other endpoints on the public Internet. There would then be the requirement to frequently reuse these addresses which can lead to a confused Internet setup.

It has also been augmented by the “World IPv6 Day” taking place on June 8 2011 where most of the popular sites had to run a dual IPv4/IPv6 setup to test whether IPv6 is ready for prime time. This test passed with flying colours for all of these sites and some of them still run with IPv6 compatibility in one form or another,

It is a technology that will be put on the map more so with the arrival of next-generation broadband setups, either as a way of opening up more IP addresses or as a statement to say the these services are all about “next generation Internet”,

What does IPv6 offer?

Greater number of IP addresses

There is a greater number of unique IP addresses available in the IPv6 Internet than there would be for the current-technology IPv4 Internet.

This requires the use of long address strings that may be hard to understand. For example, a typical IPv4 Internet address would be something like 211.234.5.1 whereas the IPv6 Internet address would be something like 2001:0530:ac12:2333:03aa:12f3:fe21:53f2 . This is why some shorthands have been introduced like the one mentioned in the next paragraph.

If an address had four zeros in it like 0000, the shorthand for this would be two colons as in fe80::ac12:2333:03aa:12f3:fe21:53f2 being equivalent to fe80:0000:ac12:2333:03aa:12f3:fe21:53f2 . It is worth noting that any IPv6 address that starts with fe80:: (fe80:0000: in longhand) is a stateless link-local address that would be “worked out” between network devices unless there is an IPv6 router that has a DHCPv6 server handing out the addresses.

Different network addressing setup

In the current IPv4 world, an ISP would allocate each customer’s network an outside IP address like 211.234.5.1 with a netmask of 255.255.255.0 . All devices within the network would be allocated a site-local IP address and it would be the job of the router to map through using Network Address Translation a “port number” to an inside device’s address. This has often caused problems for network setup whenever a device had to receive information from the Internet, an activity that is becoming more common with applications like Internet gaming and IP telephony.

An ISP can now issue a network prefix to a subscriber like this: 2001:0530:ac12:2333 and the DHCP server in an IPv6 router can allocate a unique “full” IPv6 address for each of the network devices. There isn’t even the need for netmasks anymore because a network can be singled out by the use of the IPv6 prefixes.

It will also therefore provide for proper direct access to each unique node on an IPv6 network.

Therefore, you will end up with more unique IP addresses for your home or small-business network than the whole of the current-generation IPv4 Internet.

Different take on network security

The fact that each network device in an IPv6 network can be globally accessible requires a rethink of the role that the network-Internet “edge” device provides.

The role of these devices in a small IPv6 network will typically be to work as a security firewall for the logical network that is behind it. It will also be asked to work as a bridge between the IPv4 network, the IPv6 network and Internet services that work purely with IPv4 and IPv6. It will be augmented with Improved designed-in security with IPSec secure-network support.

What is the reality with IPv6

Most of us may think that our small networks in our homes, shops and small offices won’t touch IPv6. But there is a strong likelihood that it will be part of next-generation broadband Internet sometime in the near future.

Compatibility setups

The dual-stack network

The fact is that some of the devices you use for the Internet may be infact ready to work with the IPv6 Internet. They will typically work with the IPv6 Internet in a “dual-stack” form where they can support IPv6 or IPv4 network traffic over the same interface. This means that each device will be known on the network via an IPv4 address and an IPv6 address. It also leads to the fact that the network will work as though it is two different networks – an IPv4 network and an iPv6 network with the same physical infrastructure.

If you establish a network with two or more dual-stack IPv4/IPv6 devices with the IPv6 function enabled, you will end up with a dual-stack network with each device being known by a stateless IPv6 address. This is even though the network has a router that can only support IPv4 network setups and hand out IPv4 IP addresses from its DHCP server.

Inter-protocol tunnelling

As well, most routers that support IPv6 will implement tunnel setups that interlink data between regular IPv4 host systems and IPv6 host systems both within and outside the network. These are typically in the form of ISATAP or 6to4 protocols which manage this process automatically. Here, the routers will set up VPN-like tunnels between IPv4 networks over the IPv6 networks to link the resources that are behind these networks.

Who’s ready and who isn’t

Standard computers, tablets and smartphones

The regular computer and the smartphone will be ready for IPv6. This has been achieved with inherent operating-system support in the newer versions of the popular desktop and smartphone operating systems.

For example, Windows has inherent support from Vista onwards and has a “kludged-in” support arrangement for Windows XP. Macintosh users will have IPv6 support from at least MacOS X Snow Leopard onwards.

The two popular smartphone platforms, iOS (iPhone) and Android have inherent support in their current versions. This is because some of the mobile carriers run IPv6 networks for their wireless-broadband services.

Network-enabled equipment

Most small-business printers that are released by the big names over the past two years are IPv6 ready.This doesn’t hold true for consumer network printers or most consumer network media hardware for that matter. It also holds true for network-capable consumer electronics like the Internet radios that I have reviewed.

A selection of high-end consumer and small-business routers do support IPv6 in some way; usually in a dual-stack method  and/or providing IPv6/IPv4 routing functionality according to one or more common algorithms like 6to4 or ISATAP. It is still worth checking with your router vendor whether there will be IPv6-capable firmware available for your existing equipment or equipment that you plan to buy.

What I will be doing at HomeNetworking01.info is that when I review network-enabled equipment and find that it has IPv6 capability, I will identify it as being IPv6-ready in its connectivity list. This will allow users to know that the equipment they plan to buy or specify can he ready to work in the IPv6 age.

Internet services

At the moment, nearly all residential and small-business Internet services aren’t running IPv6-compliant Internet services. They may run an IPv6 network as part of their backbone or own-office infrastructure bot won’t enable IPv6 with their customer-facing services or the network links that reach their customers.

This situation may change with ISPs that are part of a next-generation broadband service or who provide “geek-friendly” Internet service with the latest and the greatest technology. But I would suspect that most ISPs will provide a dual-stack Internet service when they get around to providing the customer-facing IPv6 service.

Access to and hosting the Web

If you do set up a Web page with a service provider, you may have a different IPv6-readiness issue. Most Web hosts will run IPv6 on their backbone networks and may run IPv6 as a beta-testing service which isn’t all that “polished”; but they won’t have fully-functional IPv6 for their customer-facing Web sites or the sites that they host. This is because, at the moment,  most systems and networks won’t cope properly with “dual-stack” (IPv4 / IPv6) Web-host setups because of the primary reliance on IPv4 infrastructure.

After “World IPv6 Day”, most of the big sites like Google and Facebook had found they could operate as a dual-stack arrangement without "keeling over” or having negative impact on the end-user experience. This is even though most traffic that visits these sites originates from IPv4 networks. Therefore some of the major sites are still running dual-stack or maintaining their test IPv6 site as a separate subdomain.

What will this lead to

It may lead to the ability for many devices to be globally addressed in a small network and this may be of importance if these devices are to be directly accessible from the Internet. This will be of importance with gaming and remote-access applications, and may encompass the ability to have networks addressable through a premises-unique easy-to-remember subdomain.

It could also allow for multi-premises setups to be easier to establish and maintain due to the fact that a logical network can be set up to cover the different locations. This is as long as they work on one service account. It may not hold true of portable devices that are typically serviced by different providers’ accounts.

It may yield some controversies concerning individuals’ privacy and security because of the ability to provide globally-unique addressability for each device. This is along with the arrival of cost-effective network-based monitoring setups that could track every individuals’ movements.

Conclusion

This article is informing you about what is to be expected out of the IPv6 technology that is being highly talked about through this year. It also may be of relevance as we move towards households and small businesses being served by next-generation broadband services such as the many fibre-optic networks.

Introduction

I am reviewing the HP LaserJet Pro M1536dnf monochrome laser multifunction printer which is another printer in this class that provides most of today’s expected features to the professional user. It is based on the print engine that HP has implemented in the LaserJet Pro P1560 direct-connect printer that I previously reviewed and the network-connectable duplex-capable LaserJet Pro P1600 printer.

Prices

Printer

The machine’s standard price: AUD$548.00

Toner

Other Costs

The HP ePrint “print-to-email” service is free of charge. This includes maintaining your printer’s email address and the documents that you receive through that address.

The printer itself

The HP LaserJet Pro M1536 supports the functionality that is desirable for a multifunction laser printer targeted at the small business or professional, like duplex printing, proper fax functionality for regular fax services as well as connectivity to an Ethernet network.

Typically the fact that a printer doesn’t support Wi-Fi wireless networking may count against it as far as network functionality, especially “no-new-wires” networking, goes for this market space. But the Ethernet connectivity allows this printer to work with a HomePlug network or Wi-Fi network as long as you use one of those “homeplugs” or a Wi-Fi client bridge. As well, the LaserJet, like most current-model small-business printers that connect to a network, is able to work with an IPv6 network, thus making it future-proof for next-generation networks.

Setup

This printer was easy to set up without any need for convoluted procedures, which is an advantage of HP’s integrated cartridge design used in all of the small-business LaserJets. This included connecting it to a typical small network via Ethernet. There is the option to manually configure the network settings for difficult networks.

Walk-up functions

The HP LaserJet M1536dnf can work as a convenience photocopier or a fax machine and, like most of the machines of this type, it supports “ID copy” functionality for copying documents like driving licences. As well it can digitally enlarge or reduce documents with this function being accessed from one button. Similarly, the user can do “double-sided” copying as long as they flip the original document over.

Like the HP LaserJet Pro CM1415 that I previously reviewed, this LaserJet printer uses flash memory rather than RAM to store received and pending faxes. This provides for a “power-safe” operating environment where if the power fails or fluctuates, you don’t lose received faxes that are to be printed or faxes yet to be transmitted. It also works well with the private-receive function which uses this memory as a “fax vault” where the machine receives faxes but doesn’t print these faxes until you enter a PIN code to release them. This is a feature that I would consider important if you work with confidential material in a premises that has uncontrolled access to the office technology.

Like most of the current-model HP multifunction printers and an increasing number of Canon high-end multifunction printers, this printer offers a “quick forms” feature where the printer can turn out notepaper, graph paper, music staves or similar ruled paper at the touch of a button. This is only available through the Setup menus  You still have the problem of a limited choice of ruled paper. Examples of these limitations include 10 staves for portrait-format music paper (which affects writing for certain music ensembles like vocal and piano or quartets) as well as the inability to print certain “quick forms” like notepaper or checklists on both sides.

This printer supports ePrint “email-to-print” functionality but only for receiving print jobs sent to its email address. This function could also benefit from the same “private receive” function that is available for faxes.

Computer functions

The HP LaserJet M1536dnf’s driver software had loaded very quickly in to my machine and there weren’t any particular problems associated with running it. Even practices like choosing the duplex-printing style are made easier through a “bound-document” graphic which shows how the document will come out after it is printed.

This HP LaserJet doesn’t support control-panel-initiated scan-to-computer functionality unlike most of its peers, so it didn’t need to run a scan monitor program. Other than that, the scanner is a colour unit that is able to do what is expected for this class of equipment. Of course, HP has provided scanning software that allows for “scan-to-PDF”, a function that Microsoft could provide within the Windows operating system.

Useability

The display on this unit is a large backlit LCD display with easy-to-read text. Most of the walk-up functions are a button-press away and the text and icons on the control panel are easy to see.

This laser printer, like the other HP LaserJet printers that I have reviewed, uses an integrated print-cartridge system which has the toner supply and drum unit in one user-replaceable cartridge. This makes it easier to replace the cartridges through the machine’s working life and there isn’t any need to think of having to replace a drum kit. The only limitation with this setup is that the printer isn’t as economical to run as a printer that has a separately-replaceable drum unit like the Brother laser printers.

Here, the user just has to open two lids and pull out the used cartridge and drop in the new cartridge. There isn’t any need to push extra hard to make sure the cartridge is in place.

Like a lot of these monochrome laser printers, there isn’t a way of knowing at a glance where you stand as far as your toner supply goes. Here, you have to go to the printer’s embedded Web server to check how much toner is left or print out a “Supplies Status” report to obtain this same data. There is a light on the printer’s control panel that comes on when you are really low on toner.

Print quality

The documents had come out of the LaserJet M1536dnf with the typical crispness of a laser printer’s output. This is even so with output that has pictures and text.

I had printed a photo through this printer and the picture doesn’t have a strong a contrast as the same picture printed on the previously-reviewed Brother mono laser printers.

As far as print speed is concerned, the HP LaserJet was able to achieve the required speed for a monochrome laser printer. There is still the time penalty associated with duplex printing that is common with most printers that have this feature but this penalty is around twice as long as printing a single side. It is also worth noting that whether the printer has just been used recently or not, the first page of a job is out in 6 seconds with the print mechanism working at proper operating temperature.

Limitations and Points Of Improvement

This printer, like the other HP LaserJets could benefit from the availability of optional extra-cost high-capacity print cartridges. This can allow for a business to use cheaper standard cartridges through normal times yet cater for peak printing times like larger projects.

I would also like to see a “fuel-gauge” indicator on the LCD display that indicates how much toner is available in the print cartridge, so you can know whether you need to buy more toner after those large printing project.

The fax subsystem could benefit from T.37 / T.38 standards-based Internet-driven faxing and a “scan-to-email” function in order to cater for IP-based telephony infrastructure. The ePrint email-to-print, which is an HP-driven concept, does provide some of this functionality but it could offer more.

As well, the flash-memory that is used for the unit’s fax functionality could be used as the printer’s memory this allowing for improved fail-safe printing. It can be augmented through the use of SD cards as a way of allowing the user to expand the printer’s memory as they see fit.

Conclusion and Placement Notes

The HP LaserJet M1536dnf is one of these laser printers that would fit in a very tight competitive market, a unit that would please the professional who needs to turn out many of the documents and reports as part of their business life.

The only major problem for someone who wants these desireable features from an HP LaserJet multifunction laser printer is the price of the unit compared to that of competing models that print the same way offered by other manufacturers like Brother. If a person places value on the HP ePrint service such as to print from smartphones; power-safe flash memory for faxes; a well-built machine or a simple-to-replace toner cartridge, they could go for this printer where as most other people could just opt for the Brother MFC-7460DN for their network-connected duplex-printing monochrome laser multifunction.

Article

Iliad aims to boost Free Mobile service with free femtocells – FierceWireless:Europe

My Comments

In France, Illiad’s “Free” telecommunications brand is to use femtocells as a way of increasing its effective coverage. These are devices that provide  mobile telephony coverage within small premises, typically one’s house, but use the Internet service as the backbone to the mobile telephone network.

SFR offers a similar service for their “Neufbox Evolution” customers but this requires that they pay EUR99 per month for this service. Instead Free are offering it as a complimentary service to their “Freebox Revolution” customers. Both of the triple-play platforms will have the functionality integrated in their “n-boxes” which combine a network-Internet “edge” device (router) along with a VoIP analogue telephony adaptor.

For France, this will be seen as relevant for the mobile carriers in that country as they face an uphill battle against a strong NIMBY (Not In My Backyard) culture when it comes to deploying mobile-phone towers. This is more exacerbated as the junk science and fears concerning the side-effects of electromagnetic radiation are held as gospel in some French communities.

Issues that can affect current femto implementations

A limitation I have observed with these “femto” implementations is that they will be designed to serve up to four or five handsets, which may be enough for a household. But for a country that has the cafes and brasseries at its heart, there needs to be reference designs for femtocells that can work in a similar manner to a Wi-Fi hotspot service. Here, the device could support around 10 to 15 concurrent users. The service could support multiple-carrier traffic and provide the host carrier or even the business’s owner with a service bounty for customer’s voice minutes that pass through the femtocell.

Similarly, there can be the issue of assuring coverage across the property for a femtocell setup. It may be of concern with larger properties in areas of poor mobile coverage or properties that have radio obstacles like thick brick walls for example. This could be rectified by establishing a mechanism for “multi-femto” arrangements where the same backbone can serve two or more femtocells with proper seamless handover.

Other technologies

Of course there are other technology setups that may work instead of the femtocell. The classic example may be the use of Wi-Fi technology with EAP-SIM authentication and VoIP call-provisioning systems to provide “indoor” mobile-call service. This will typically require the phone to have integrated Wi-Fi functionality which most smartphones do have; but support seamless handover, quality-of-service and accounting between cellular and Wi-Fi networks.

Another issue that will affect this setup is current-generation Wi-Fi transceivers that are integrated in smartphones is energy use when in full activity. Here this will affect the mobile phone’s battery runtime and typically cause the phone to require charging more frequently. Most likely this will be rectified in the upcoming generations of Wi-Fi transceivers available for these devices.

Conclusion

The French femtocell services offered by Free and SFR are worth examining as far as private femtocell and “quad-play” (TV, telephone, mobile telephone and Internet) services go. Here, it would be worth examining the technology and its relevance for mobile-telephony service goes especially where the NIMBY culture thrives; and identify the real problems where it can run into when using it to augment these service in the public and private realms.

Article

Smart TV – why are Blu-ray players second-class citizens?

My comments

I agree with the principal argument that this article had put forward concerning the availability of the “smart-TV functionality” in video peripherals like Blu-Ray players or network-media adaptors. There is due to a reality that most of the consumer-electronics industry has been missing concerning how people have purchased and owned TV sets; something I, like most of you, have seen for myself.

The reality with TV purchasing and ownership

Since the 1970s, the typical colour television set has been able to enjoy a very long and reliable service life, thanks to transistorisation. This had been underscored with the gradual introduction of electronic tuner subsystems that were more reliable than older mechanical tuner systems like the old “click-click-click” tuning knobs that were common in most markets or the “push to select, twist to tune” button arrays common on TV sets sold in the UK in the 1960s.

This long service life then allowed for a “push-down” upgrade path to exist in a similar manner to what happens with the household refrigerator. Here, one could buy a nicer newer fridge and place it in the kitchen while the older fridge that it was to replace could go in the garage or laundry and act as extra cold storage space for food and drink, such as the typical “beer fridge”. In the case of the TV, this would mean that one would buy a newer better TV, most likely with a larger screen and place it in the main lounge area. Then the original set which was to be replaced by the new set typically ended up in another room like a secondary lounge area or a bedroom or even in a holiday house.

Usually the only reason most households would scrap a TV set would be if it failed beyond repair or was damaged, Even if a set was surplus to one’s needs, it would be pushed off to another household that could benefit.

Some people may think that this practice has stopped with the arrival of the LCD or plasma flatscreen TV, but it still goes on.

Not all TVs are likely to be “smart TVs”

Not all manufacturers are likely to offer network-enabled TVs in their product cycle. This may be due to a focus on picture quality or the ability to build lower-end products to a popular price point.

It also includes sets like TV-DVD combo units or small-size models that are offered at bargain-basement prices. As well, home-theatre enthusiasts will be interested in buying the latest projector rather than the latest “smart TV”.

Addition of extra functionality to existing televisions with video peripheral devices

The consumer-electronics industry has had success with extending the useability of existing television receivers through the use of well-equipped multi-function video peripherals.

The video recorder as a TV-enablement device

The best example of a device enabling older and cheaper TV sets was the video cassette recorder as it evolved through the 1980s. This wasn’t just in the form of recording of TV shows and playback of content held on videocassettes.

It was in the form of improved television viewing due to the TV tuners integrated in these devices. By model-year 1981 in all markets, the typical video recorder was equipped with a reliable electronic TV tuner. As well, all VHS and Betamax video recorders that implemented logic-control tape transports also implemented a “source-monitor” function when the machine wasn’t playing tapes. This would typically have the currently-selected channel on the machine’s tuner available at the machine’s output jacks including the RF output channel that the TV was tuned to.

Here, this setup gave the old TVs a new lease of life by providing them with a highly-reliable TV signal from the VCR’s tuner. In some cases, users could tune to more broadcasts than what was available on the TV set. Examples of this included cable channels received on an older “non-cable” TV in the USA or Germany; channels broadcasting on the UHF band through a mid-70s VHF-only TV in Australia and New Zealand; or access to Channel 4 on a “4-button” TV in the UK due to more channel spaces.

The ability to change channels using the video recorder’s remote control also allowed a person who had a cheaper or older TV to change channels from the comfort of their armchair, something they couldn’t previously do with those sets.

Similarly, some households would run a connection from the video recorder’s AUDIO OUT to their hi-fi system’s amplifier and have TV sound through their better-sounding hi-fi speakers. This was exploited more with stereo video recorders, especially those units that had a stereo TV tuner integrated in them, a feature that gradually appeared as TV broadcasters started to transmit in stereo sound through the 80s and 90s.

How the Blu-Ray player is able to do this

The typical well-bred Blu-Ray Disc player has the ability to connect to the home network via Ethernet or, in some cases, Wi-Fi wireless. This is typically to support “BD-Live” functionality where a user can download and view extra content held on a Blu-Ray Disc’s publisher’s servers in addition to viewing content held on the disc. As well, the Blu-Ray Disc player can connect to ordinary TV sets as well as the HDMI-equipped flat-screen TVs that are currently in circulation.

Some of the Blu-Ray players, especially recent Samsung, Sony and LG models can also pull down media from the DLNA Home Media Network and show it on these TVs. As well, some manufacturers are rolling out some Internet-ended services to these players.

In the same way as the video recorder was able to extend the functionality of the cheaper or older TV set by offering extended tuner coverage, remote control or access to better sound, the Blu-Ray player or network media adaptor could open the world of Internet–ended entertainment to these sets.

What the industry should do

The industry could work towards achieving similar interactive functionality for the network-enabled video peripherals as the network-enabled TVs. They could achieve this through the establishment of a “platform design” with similar applications and capabilities across a consumer-video product lineup. It is infact what Sony is doing for their consumer-video products at the moment with very little difference in interactive-service lineup between their TVs and their Blu-Ray players.

Here, the interactive-TV software is consistent across the whole lineup of TVs, Blu-Ray players, Blu-Ray-equipped home-theatre systems and other video peripherals. The manufacturer may vary the software according to the device’s function by omitting functions relating to particular hardware requirements like screens, optical drives or broadcast tuners in order to make it relevant to the device class. Of course, there could be support for user-attached peripheral devices like USB Webcams, Bluetooth-enabled mobile phones, UPnP-compliant printers and the like to extend functionality for particular software applications like video-conferencing.

The software may be fully revised every few years to build in new functionality and accommodate better hardware. It may also be a chance to improve the operation experience for the software concerned. Yet this could maintain the branding and skinning that the manufacturer and software partners do desire.

Conclusion

There is a different reality that exists when buying TV equipment and this function should be supported equally in video peripheral equipment like Blu-Ray players and network media adaptors as in TV sets.

Product Page

Netgear WN3000RP

My Comments

There has been some increased Internet publicity about Netgear’s WN3000RP “universal range extender” which is intended to extend Wi-Fi coverage in to a network’s dead spot. Devices like this one are billed as being able to work with any 2.4GHz Wi-Fi network segment such as an ISP-supplied “Internet-network edge” wireless router.

But these devices work in a particular manner that may cause problems with network use. Here, they work as a wireless client bridge to the existing network and set themselves up as a Wi-Fi access point that is its own “extended service set” or Wi-Fi network segment. Most of these devices will typically have an Ethernet connection for use with Ethernet-ended network devices like PCs, network printers or games consoles and work as a Wi-Fi client bridge for these devices.

What can go wrong

Positioning in the wireless network

There is infact a lot that can go wrong in setting up and using these devices. One issue is how the device is positioned in the master wireless segment that is to be extended. You have to locate these devices just off the fringe of that wireless segment in order to avoid unreliable service from the client devices on both network segments. Usually, you would have to keep an eye on two indicator lights – one which shows reception quality relative to the master wireless segment and one which shows the quality of the wireless segment created by the device.

Operation of Wi-Fi client devices

As well, users will need to make sure that their laptop computers, smartphones or other devices point to the SSID associated with the range extender. In the case of the Netgear device that is set up using WPS to the “master segment”, the SSID will be a combination of “master_segment_SSID” + “_EXT”; like “BIGPOND-1234_EXT” for a hypothetical Telstra-supplied Wi-Fi router whose SSID is “BIGPOND-1234”. Of course, the WPA security parameters will be the same as that for the “master segment”. It may also require users to make sure their devices “latch on” to the SSID that is strongest for the area they are in; which may be a problem with laptop computers running some desktop operating systems; or some network devices like some Internet radios.

Bandwidth availability and advanced Wi-Fi setups

Another factor that is also worth considering is that the data bandwidth available in this newly-created segment will be smaller that that available in the master segment due to the device working from a weaker point of the master segment. Of course, never expect these devices to offer advanced network behaviour like client isolation for use with hotspots or support for multi-SSID access points for example. With the latter example, these devices will only work with one of the SSIDs available from these access points.

WPS network setup

A key point of confusion that can occur with Netgear’s wireless range extenders is the way the WPS “push-to-connect” function works. These devices have one WPS button on their control surface, which handles associating with the “master segment” or associating with a client device on its own segment. When you set up the range-extender for the first time with a WPS-enabled access point or router on the master segment, you are meant to press this button on this range extender to start the WPS cycle then press the button on the WPS-enabled access point to complete the process. Then you enroll a WPS-capable client device on this range extender’s segment by starting the WPS-configuration process on that device then pressing the WPS button on this range extender. What can happen is that a person who is enrolling the client device could press the button on the range extender before starting the WPS-setup process on the client and this could make the device assume it is connecting to another master segment rather than enrolling the new client.

What could be done to make these devices better

Firmware that suits multi-function operation

Of course the current firmware with these devices prohibits using them as a “pure” Wi-Fi access point with a wired backbone to the network. This is although they work properly as an access point for the new segment with the Wi-Fi “master segment” as their backbone. Rather, I would prefer that these devices have a “multi-function” firmware in place which allows at least three operation modes: a wireless range extender with one wireless segment as the backbone and another covering the area; a wireless access point with a wired backbone; and a wireless client bridge serving Ethernet-connected devices.

Improved designs could use a hardware switch that selects between the operation modes. This can then lead to a logical foolproof WPS operation mode with the WPS button only used for enrolling client devices in modes other than “Client Bridge” whereupon it would be used to enrol with the master segment. The user would be required to set the unit to “Client Bridge” mode when the want to establish a wireless backbone, then set the unit to “Range Extender” mode for operation as a range extender with a distinct satellite segment.

Improved WPS operation

Similarly, these devices could have improved WPS-button logic such as a “long press” for setup with a master segment and a “short press” for client setup. This can avoid further operation complications due to someone who intends to enrol a client device causing these range extenders to “hunt” for new master segments and affecting access to the network by established devices.

Conclusion and my opinion on these devices

If I was to extend the coverage of a wireless network segment, I wouldn’t necessarily use the wireless backbone method that is encouraged with these devices. Instead I would use access points run off a wired (Ethernet or HomePlug AV) backbone. This would then make sure that there is the full bandwidth available across the coverage of the network

Article

BBC News – IBM at 100: From typewriters to the cloud

My Comments

When International Business Machines (IBM) had come on to the scene as an office technology company, there weren’t many technologies around that made office life more productive. Now this company has built up a steady path of innovation in this field and it has culminated with the development and refinement of the mainframe computer through the 1960s and 1970s; and the establishment of a highly-desirable office electric typewriter equipped with an interchangeable “golf-ball” typehead, known as the “Selectric”.

But this company had a strong hand in the personal-computing scene with the arrival of the IBM PC. This desktop computer, which was based on Intel electronics and a Microsoft operating system had set the benchmark for an affordable desktop computer for small businesses.  Through the 1980s, this computer was refined through the use of colour graphics, hard disks and faster processors. Australian readers may know that a lot of these computers sold in that market were built in a factory in Wangaratta, Victoria.

In a similar vein, another company called Lotus had developed the quintessential desktop spreadsheet application known as Lotus 1-2-3. Due to its flexibility and capability, this program became the preferred spreadsheet application to be run on an IBM PC.

But these computers had effectively brought the desktop computer out of the realms of the hobbyist and in to the hands of business. This was initially in to the hands of the bookkeepers and similar employees but, in the late 80s and early 90s with the arrival of cost-effective computer networks, ended up in the hands of most office workers from the top floor to the bottom.

The PS/2 era wa a markedly different era with an attempt by IBM to develop their own operating system and graphic user interface, which was known as OS/2. These computers also used a high-speed interface bus, known as the Micro Channel Bus, that was different from the EISA bus that was used by the rest of the industry. The main benefits that these computers had provided for the industry-standard Intel-based computing environment included the use of micro-DIN keyboard and mouse interface ports, including a standard interface for the mouse; a small power-supply reference design which allowed for the power switch to be located on the front panel; and the use of 1.44Mb 3.5” diskettes on the Intel-based PC platform.

Through the late 90s, IBM had shifted away from its hardware roots and moved towards its role as a hardware-software “solutions provider” for big business. This was evident with them devolving their main hardware lines to other companies; like Lexmark for printing and imaging, Hitachi for data storage, and Lenovo for personal computer systems. It was although they bought out Lotus and implemented Lotus, who had shifted to “Notes” as an information-management system,  in their solutions. Here, it has led to them being able to work on “cloud-based” computing projects that can help these businesses manage their information across many locations.

Infact, I would consider the existence of IBM to be a “milestone to the connected lifestyle” in itself due to its development and refinement of both “back-end” and desktop computing equipment central to this lifestyle.

Happy 100th Birthday, IBM