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Wireless Systems
DSL Wireless Modem – An All-In-One Device to Build a Wireless Network in Home
Building a wireless network in home or SOHO (Small Office Home Office) is not a very difficult task to do today, even though by someone without computer networking experience. With DSL wireless modem, you can build a wireless network in home easily and securely.
For mostly people without any computer network knowledge, building the wireless network in home is even something that they never imagine before. However, if they know all the requirements to build a wireless network can be replaced by a single all-in-one DSL wireless modem, technical complexities of computer networking, connection, and configuration can be minimized as small as possible.
One of the apparent reasons to build a wireless network in home today is to share the broadband internet connection with many computers in the household. Besides, with the wireless network in home you can browse the internet with your laptop at the pool side, with your Wi-Fi phone or Skype phone - you can make some internet calls anywhere within the house without the need of turning-on the computer, or you can go live game with your XBOX console in the comfort of your living room without the clutter of the wires. All the requirements you need to build a simple wireless network in home or SOHO is a single all-in-one DSL wireless modem. What are actually the requirements to build a wireless network in home?
Firstly, you need a DSL modem. A modem is a digital to analog signal converter and vice versa, and is an interface device between the subscriber premises and the local Telco or the ISP. Generally when you signup for a broadband internet services, the ISP provides you a modem which is connected directly to a single computer using a USB connection or Ethernet connection. A DSL wireless modem includes a built-in DSL modem – the first requirements you need.
Secondly, you need a router or firewall. A router or firewall protects your private internal network from public networks (the internet) against any types of the threats. Typically home routers are powered by the dual-firewall feature – NAT and SPI. Network address translation (NAT) helps you hide the private network from the public network, while the stateful packets inspection (SPI) inspects the incoming packets precisely and thoroughly against any false positive packets. A DSL wireless modem includes the function of dual-firewall – the second requirements you need.
Thirdly, you need a wireless access point. All wireless devices communicate with the wireless network infrastructure using the wireless access point. Access point bridges network devices in the wireless network with the network devices in the wired network. Wireless access points extend your network wirelessly within the wireless coverage. A DSL wireless modem includes the function of the wireless access point – the third requirements you need.
Lastly, you need a LAN Switch that will interface the wireless access point to the wired network. Typically the DSL wireless modem includes a 4-port LAN Switch. With these Ethernet ports, you can also connect the computers directly using the UTP LAN cable; and connect the Ethernet print server to share the printer on the network. The recent products shipped with the 10/100/1,000 Mbps Gigabit port – with auto-sensing Ethernet port. With auto-sensing LAN port, you don't need to worry about the cable type used, either cross UTP cable or straight-through cable – the system will detect the cable type used and adjust the system automatically.
Typical DSL wireless modem includes the above four functions, a DSL modem, a router / firewall, a wireless access point, and a Switch LAN. By purchasing this single all-in-one device – the DSL wireless modem; you can build a simple wireless network in home or SOHO easily and securely. You do not need to buy separate devices to reduce the complexity of the connection, the configuration, and the setting of the wireless network.
Network Setup and Connection
Since DSL wireless modem is a single device – a single solution in building the wireless network, the connection and configuration is simple. By default, with a single connection to the DSL line – the wireless network will be functional. Off course, with the default setting – no security encryption is applied to the wireless connection. Security feature is not enabled by default.
Connect the Internet port (or the WAN port) of the DSL wireless modem to the phone line (the DSL line). Unlike dial-up connection, DSL internet uses the same line as the phone line without interfering each other; both Internet and voice can work together at the same time. Traditional internet using dial-up modem uses the phone line for Internet connection, but at the same time you cannot use the line for the voice (phone calls) until the internet connection is released. With this single connection, your DSL wireless modem is ready to provide wireless roaming within the house and all the computers (with the Wi-Fi enabled) can connect to the network with a simple configuration and even with a simple plug and play.
Each computer on the network needs an IP address to be able to communicate via the network, so how can you provide and configure the IP address? DSL wireless modem includes a DHCP service which is enabled by default. DHCP server provides and leases the IP address configuration to the computers on the network automatically.
There are many DSL wireless modems available at the market today ranging from devices with 802.11g standards and the latest standard is the draft 2.0 802.11n. Draft 802.11n is the future wireless technology which is not ratified yet, but mostly all the wireless manufacturers have shipped their products using 802.11n standards.
By Ki Grinsing
About the Author
Ki Grinsing was graduated from a university with the additions of MCSE and CCNA certifications. He has long years of working experiences in IT. For a complete article please visit DSL Wireless modem and Wireless adapter for XBOX .
How Safe Are Wireless Home Security Systems?
Are wireless home security systems safe? Info from the Brickhouse Security say "Wireless Home Security Systems are fully wireless and have built-in power supplies; even if the phone, power and Internet connections are down, your Wireless Home Security System will continue to monitor and protect your property. This feature will come in handy if an intruder cuts the power and phone lines, or there is a blackout and burglars are on the prowl." Does this mean that the system has its own cell-phone built-in or uses a satellite so it could notify the PD and if so doesn't a burglar need nothing but a signal disrupter? No I'm not a burglar, just curious in how it works and how safe it really is. We all know if you have an alarm set to the phone-line someone can cut the lines, if you have digital phone someone can just turn the power off your house, or do both. So can a disrupter knock out the system signals? The real question is, "How safe are any Home Security Systems?"
Wireless security systems are highly inferior when compared to their Hardwire counterparts. The sad fact is, the only reason alarm companies install wireless is because it is easier and monitored alarm systems are a numbers game... the faster you get them in the more money you end up making. Truthfully, it is a dis-service to the end user.
As far as the supervision of phone lines, there are cellular solutions available, typically these will relay your alarm signal to a clearing station which will then route the signal to your monitoring station. I have a number of accounts in this technology and it works great.
Crooks tend to cut the phone lines then wait to see if there is any response. If nobody shows, they break in, kill the alarm panel (Which is much easier on a wireless toilet alarm) and have their way.
I have written an article on wireless security and it can be viewed in the archive at http://www.keepsafesystems.ca or below. It may seem biased to some, however I have been in the industry for 20 some-odd years and know the truth first hand. This is how I see it.
Wireless Vs Hardwire
This is an ever-growing debate within the security alarm industry; both sides have their opinions as I have mine. Since starting KeepSafe Systems, I have never installed a wireless security system. There are several reasons starting from appearance, reliability and sustainability to never having the need to and always finding a way to get a wire where it is needed.
Appearance is a large concern of many homeowners. Although transmitters have gotten smaller over the years, wireless security systems involve the installation of boxy transmitters around your doors and windows. Wireless security system supporters will often tell horror stories of holes drilled throughout your home or wires stapled all over your walls. Yes, I have seen these types of installations, for the most part, they are done by inexperienced or lazy technicians who prefer wireless security systems. Although some wire runs can be difficult and very occasionally require surface runs, there is no excuse for sloppy workmanship. Pick your security alarm installer very carefully; often the small business owner will take more care in ensuring the quality of the installation.
When it comes to the reliability of security systems, hardwire will always be the more reliable of the two. Wireless security alarm supporters of course will say “modern wireless security systems are supervised”, basically this is passing over the pitfalls of the technology and adding a feature to tell you when the technology fails. This inevitably runs into expensive and time wasting service calls, equipment replacement and potential false alarms. One need only look at the cordless phone to see the pitfalls of the wireless technology. Sure they are great when you first purchase them, however, age and interference take their toll and sooner or later you have a paperweight with buttons and an LCD screen.
Sustainability is potentially the most expensive reason for choosing hardwire security systems over wireless. I can’t even begin to count the changes in wireless security technology and frequencies used since getting into the business back in the late 80’s early 90’s. Even the wireless security system supporters will tell you that technology is always changing (Except they use the word “advancing”… it sounds better in advertising). So how do wireless security system “advancements” affect the owner of a wireless security system? Easy, say for example you were the unfortunate victim of a wireless security system sales person in 1995. Chances are if one of your motion detectors fails you will be hard-pressed to find a replacement. Simply put, you will now have to purchase an entirely new security system (Control panel, detectors, keypad etc) which depending on the size of your security alarm system will cost you as much and possibly more than if you would have installed a hardwired system to begin with. So in all fairness, I feel I should tell you what is in store for you if a hardwired detector fails. Simple, you replace the detector. Hardwire detectors are simple switches and most hardwire security system detectors are interchangeable regardless of the manufacturer.
Another factor within the realm of sustainability is the cost of upgrading. Back to the system installed in 1995. Yes there have been significant changes in security alarm technology since then. In the hardwire security system world, these changes are mostly in the area of convenience, esthetics and features. If all your detectors are in working order, upgrading a hardwire security system simply involves changing the control panel and keypad(s). This is generally a fairly easy process and is substantially less expensive than upgrading a complete wireless system.
One last consideration in choosing hardwire security systems over their wireless counterpart is the selection of detectors. Although you can retrofit almost any hardwire detector to a wireless system, there are far more choices of detector types in hardwire. Take for example Carbon monoxide, water, natural gas, propane, vibration… and the list goes on. Wireless security systems are generally designed around the average security need of the consumer. Since detectors are not interchangeable across manufacturer lines, it would be financially unfeasible for a wireless security system manufacturer to create wireless detectors for every conceivable need. Even in the spectrum of standard detectors, there are some manufacturers who have extremely reliable detectors that only work on hardwire systems. Choosing a wireless security system can often result in you having a detector less suited for your particular application. Once again the average security need factor comes into play.
Inevitably, the choice of whether to have a wireless or hardwire security system installed is entirely up to you. In fact, your only choice may be wireless. Hopefully I have given you some information to help you along with your decision.
Bad A*s-tro A40 Wireless System Review