fundamentals of wireless communication


fundamentals_of_wireless_communicationsfundamentals of wireless communication  fundamentals_of_wireless_communications.pdf

The “fundamentals of wireless communication†written by David Tse of the University-of-California and Pramod Viswanath of the University-of-Illinois is a must read. This book is intended for use on graduate courses in electrical and computer engineering and will also be of great interest to practising engineers.â€

The “fundamentals of wireless communication†is published by the Cambridge.University.Press with ISBN: 9780521845274.  It is available online through stores such as Amazon.

An extract from another website puts the objects of this publication very succinctly:
“The past decade has seen many advances in physical layer wireless communication theory and their implementation in wireless systems. This textbook takes a unified view of the fundamentals of wireless communication and explains the web of concepts underpinning them at a level accessible to an audience with a basic background digital communication. Topics covered include MIMO (multi-input, multi-output) communication, space-time coding, opportunistic communication, OFDM and CDMA. Each concept is illustrated using numerous examples from real wireless technologies such as GSM, IS-95, IS-856 (1 x EV-DO), Flash-OFDM and UWB (ultra-wideband). …………..

At TelephoneSystemsDirect we have taken on board the fundamentals of wireless communication when talking to our clients to determine which particular technology will suit their specific scenario.

For more information on Wireless Phone System solutions please call us on 0800 652 8052.

dect phone


dect_phoneJust think that in the year 2000 a dect phone wasn’t very common.  Today you’ll find at least one dect phone in most people’s homes as well as them being ubiquitous in any office environment.

dect_phone_smsChoosing a domestic dect phone is now down to the style that pleases the eye, rather than its features.  Most dect phones today have an adequate range for houses and small offices.  Where choice becomes more difficult is where you want a single dect phone or multiple handsets to operate over a larger area, such as a school or hospital.  In these cases repeaters have to be installed, and you need someone qualified to ensure there are no radio black spots; otherwise you might get cut off in the middle of an important call.

Telephone Systems Direct has a dect phone solution for all scenarios from a solitary dect phone with ansaphone to a 128 user network.  We’ve been in the telecoms industry since 1992 with installations throughout the length and breadth of the UK.  dect_phone.pdf

Ydect_phone_2_line_cordless_phone_systemou can buy your dect phone online through our e-commerce store with 25% discount (that’s on the DECT5120)
or by phoning us on 0800 652 8052 where we’ll discuss the best deal on your dect phone.

dect sms phone


dect_sms_phoneThe BT Verve 410 DECT SMS phone is styled and designed for use in the home, as well as the office.

DECT SMS phone: The BT-Verve 410 is available in Single, Twin, Trio and Quad packs.  dect_sms_phone.pdf

By dialling 0800 652 8052 it gets you through to the team at Telephone Systems Direct who can offer you a good price on this and a selection of DECT SMS phone models. 

Have your credit card to hand when you ring so we can arrange instant dispatch.

DECT SMS phone Spec: 10 hour talk time; 100 hours standby; SMS text messaging, 200 number directory, Built-in speaker phone, Polyphonic tones, Ringer / Handset volume controls, On hook calling, Call-timing, Out-of-range warning, Incoming and Outgoing logging, Transfer, Redial, Paging, Hold and Recall, Speed dial, battery indicator, Missed calls log, Display (LCD), GAP compatible, 1 Year Manufacturer Warranty.

We think you’ve found the cheapest prices here, so don’t look elsewhere!

dect sms quad phone


dect_sms_quad_phoneThe BT Verve 410 DECT SMS quad phone is an ideal candidate for style and design in the home, as well as the office too.

DECT SMS quad phone: The 410 is available in Single, Twin and Trio packs if you don’t need the Quad. dect_sms_quad_phone.pdf

DECT SMS quad phone Spec: 10 hour’s talktime; 100 hours standby time; SMS text messaging, 200 phone book locations, Built-in speakerphone, Polyphonic ringtones, Last number redial, Ringer and Handset volume controls, On hook dialling, Calltimer, Out of range warning, Incoming and Outgoing call list, Transfer, Paging facility, Hold and Recall button, Speed dial, Low battery indicator, Missed calls log, Liquid Crystal Display (LCD), GAP compatible, One Year Manufacturer Warranty.

0800 652 8052 gets you through to the advisors at TelephoneSystemsDirect who can give you a good deal on a selection of DECT SMS quad phone models.  We’ve listed this because it’s the most popular at present.

Have your credit card to hand when you ring so we can arrange instant dispatch.

cordless wireless


cordless_wirelessCordless Wireless technologies have freed users to roam anywhere.  Cordless Wireless phones allow us to communicate immediately wherever we are in the World through either DECT, Wi-Fi, GSM, CDMA, OFDM or other emerging standards……..

cordless_wireless_5120For cordless wireless answers for the office you should ring TelephoneSystemsDirect on 0800 652 8052.  From a single cordless wireless handset with ansaphone to installations with up to 128 handsets we have the solutions.  cordless_wireless.pdf

There’s a publication “The fundamentals of wireless communication†written by David Tse of the University-of-California and Pramod Viswanath of the University-of-Illinois which might be worth reading. This book is aimed at graduate courses in electrical and computer engineering and will be of great interest to comms engineers.

Getting back to basics:  Our warehouse has cordless wireless telephones and cordless wireless headsets all at attractive prices. 
By dialling 0800 652 8052 our advisors will guide you through the complexities of choosing the right cordless wireless unit for the application you have in mind.

We’ve been in this business since 1992 and our team has dealt with cordless wireless implementations for companies large and small.  This is one of the reasons why we’ve been accorded the SME Reseller of the Year recently.  We also recommend the “What to Buy for Business†magazine BEST BUY phone systems which have cordless wireless packages with 25% discounts.

Call us – today!

dect ansaphone


dect_ansaphoneWe have DECT ansaphone models for every occasion.  In the home or in the office.  A DECT ansaphone provides the ability to give an out-of-office message or a greeting for unanswered calls as-well-as the freedom to take them anywhere.

In business you might use a DECT ansaphone in a very small company to handle callers when everyone else is busy.  At TelephoneSystemsDirect we would recommend you contact us so we can tell you which are the most popular sellers at present, and why, plus low-cost alternatives such as the OfficeServ7030 with integral voicemail.  dect_ansaphone.pdf

Probably the best DECT ansaphone available as this article is written is smooth and black: the great value Panasonic KX-TG5521EB digital phone has a rounded base-unit that incorporates an answering machine and speakerphone. Simply press the soft-touch button and you can talk to your heart’s content as you wander around. Or why not let the rest of the family join in the conversation?

Callers can leave you up to twenty minutes worth of messages and you can even retrieve them via the base unit, handset, or evenly remotely. The KX-TG5521-EB also has an illuminated blue 1.8†easy-to-read LCD screen and keypad, and navigation is through a central menu key that gives easy access to the comprehensive menus.

These are sold in Single, Twin, or Triple Packs.

0800 652 8052 connects you to Telephone Systems Direct for the cheapest deals on a DECT ansaphone.

dect extra handsets


dect_extra_handsetsThe trouble with dect extra handsets is that if you don’t buy them within a few weeks of buying the first pack, they’ve probably been superseded!

At TelephoneSystemsDirect we have access to loads of dect extra handsets including Panasonic, BT, Samsung, Siemens, Kirk, etc……dect_extra_handsets.pdf

By calling our advisors on 0800 652 8052 we’ll be able to get dect extra handsets for you and save you hours of trawling through the Internet, making unsuccessful telephone calls and generally wasting your time!  Let us take the weight off your shoulders.

Telephone Systems Direct provides phone systems and services to the business community throughout the UK – we keep the wheels turning, despite the efforts of the politicians!  Our engineers install DECT and Wi-Fi solutions for businesses ranging from Hotels to Schools, Lawyers to Dentists.

So think carefully when choosing dect extra handsets – spending a bit more initially will make savings later on.  Buy now!

dect head set


dect_head_set_cs60Your dect head set is very personal.  You don’t need your dect head set messing up your hairdo; do you?dect_head_set_cs70

At Telephone Systems Direct we give you the wisest choice of dect head set products from the leading manufacturers such as Plantronics, Sennheiser Doro and Jabra. By contacting our advisors on 0800 652 8052 we’ll advise whether a Plantronics-CS60 dect head set will be most appropriate for a specific individual’s use.dect_head_set_C65

We will inform you which are the most popular dect head set sellers today and why, as well as providing you with possibly the best prices around.

The Plantronics-CS70N dect head set is becoming a favourite with our customers because of its superb range, handset lifter attachment and easy operation. It keeps you in touch with all your callers wherever you are in your office.  These can be fitted to the older Samsung Euro and newer OfficeServ5000 keysets behind DCS, iDCS and OfficeServ phone systems, but also fit many other makers’ models.

0800 652 8052 for dect head set advice and sales.  dect_head_set.pdf

2 line cordless phone


2_line_cordless_phoneThe 2 line cordless phone for business varies from business-to-business.  For the smaller office a solitary cordless phone will allow you to make calls when you’re outside having a break but you won’t be able to shuttle between two separate conversations.  We have loads of these here.

In larger offices a 2 line cordless phone has to be feature-friendly allowing you to answer and transfer a call as well as putting it on hold while making another – without having to have a degree!   2_line_cordless_phone.pdf

2_line_cordless_phone_5120Wi-Fi or DECT? That is the question with 2 line cordless phone technologies?  Normally it’s the latter as dect connects to you phone system with analogue extensions while WiFi integrates through an IP port.  The environment could force you to use one of these technology routes purely due to speech clarity and the lack of black spots as they operate in different frequency bands.

If you already have a wireless LAN then choosing a 2 line cordless phone like the Samsung SMTi-W5120
(25% OFF from TelephoneSystemsDirect), would be a wise choice giving full PABX features throughout your site: no need for additional Wireless Access Points having to be installed – this would result in an overall saving even though handset prices are generally higher.

2_line_cordless_phone_platTelephone Systems Direct has a selection of 2 line cordless phone models from BT, Panasonic, Siemens ………and some others….some come with answer-phone machine built in…..in single, dual, triple, packages…..up to networks of 128 handsets.

Call us on 0800 652 8052 for 2 line cordless phone advice.

digital phone cordless


digital_phone_cordless_3The digital phone cordless for business varies from company-to-company.  For the very small office a solitary digital phone cordless will allow you to take calls when you’re outside having a smoke.

digital_phone_cordless_1In larger offices then the digital phone cordless units need to be a little bit more feature friendly allowing you to receive, make and transfer a call.  Discrete notification of that important message left in your mailbox may well be crucial when you’re in a meeting.  digital_phone_cordless.pdf

The question with digital phone cordless technologies is DECT or Wi-Fi?  Normally it’s the former as it is generally cheaper, but if you already have a wireless LAN in place then choosing, say the Samsung SMTi-W5120, would be sensible.  You get full PABX functionality across your site without additional Access Points having to be installed – thus making a saving.

digital_phone_cordless_2The environment might force you down one of these technology routes purely due to performance as they operate in different frequency bands.

digital_phone_cordlessTelephone Systems Direct has a plethora of digital phone cordless models from Panasonic, BT, Motorola, Siemens………and many more….with answer-phone machine built in…..in single, duo, trio…..up to schemes of 128 handsets.

Call us on 0800 652 8052 for digital phone cordless advice.