One of the Cheapest Deals around - the Nokia 2630

Filed under: Life Of Telecommunication — admin at 5:48 am on Saturday, August 23, 2008

The 2630 encapsulates all that is good about Nokia. Nokia have done a excellent job on the overall design of this mobile handset. With this mobile phone Nokia have built something which is functional, if a little basic for the price.

There are lots of offers on offer to potential handset customers. By using, for example, a site to compare mobile phones you can get a 12 month free line rental or a mobile phone with a free Sony Bravia 32 inch HDTV.

The 2630 is compatible with 2G GSM 850 / 1900 - US version . The 2630 is fitted with a VGA, 640×480 pixels, video(128 x 96) camera. A WAP 2.0/xHTML compatible browser is also included. A Standard battery, Li-Ion 700 mAh (BL-4B) battery is that is fitted to the Nokia 2630. Regarding the all important battery cell life the Nokia 2630 has 310 hours reserve charge and 6:00 talk time. The available ring-tones enabled on the 2630 are Polyphonic (24 channels), MP3 as well as a vibration alert . The display type on this mobile handset is a TFT, 65K colors. For a handset in its price bracket, in terms of weight, the Nokia 2630 scores well against its competitors at 66 g. The 2630 is very small. Colour wise this handset only comes in Black. This mobile handset is bluetooth enabled making compatibility with a range of contemporary mobile phone devices very convenient. The 2630 also features a few extras, for example , Built-in handsfree, Currency converter, Java MIDP 2.0, FM radio, Calculator and Calendar.

Although this is quite a new model, the Nokia 2630 has lots of competition. This means that it is pretty easy to pick up some great bargains on this handset.

Transceivers: A Primer

Filed under: Life Of Telecommunication, School of Technology — admin at 6:08 pm on Thursday, July 24, 2008

Transceivers: A Primer

A transceiver serves two function; it is both a receiver and a transmitter which are combined together to form one unit and operate using the same circuitry. In some cases the circuitry will not be shared; in this case it is called a transmitter-receiver which was originally invented in the 1920s. Transceivers must combine a large portion of the handling circuitry that the transmitter and receiver share in order to be considered a transceiver and not a transmitter-receiver. If you are reading from an IEEE 802.3 document, then you will often see transceivers referred to as medium attachment units, or MAUs.

Medium attachment units can convert signals over either an Ethernet cable or an AUI signal. For the original 10base5 Ethernet, the medium attachment unit was often clamped directly to the Ethernet cable itself. Standards changed however with the advent of the 10base2. At this point the medium attachment unit was simply integrated within the card. Then in an effort to keep costs low, which was demanded by their consumer base, the entire Ethernet controller device was simply shrunken down into a single chip. Similar to a hub, a medium attachment unit shares much of the same characteristics, expect for the fact that an MAU allows a token to pass between the devices of different networks, even if the network utilizes physical Star topology. In modern Ethernet systems that are either hubbed or switch-based, the MAU and AUI devices are not used, except for in certain unordinary circumstances. They are replaced by the CAT5 cable. This cable connects directly into the Ethernet socket which can be found on the host or the router. Backwards capability exists with certain equipment which utilizes an external AUI interface. Medium attachment units can still be found on units with 10base2 and 10baseT connections.

Transceivers exist in various devices. They are most often used in computers, telephony, and radios. Computers often use transceivers in the guise of the previously discussed medium attachment units. These are often fiber-optic gigabit and 10 gigabit transceivers which are also known as: GBIC, SFP, XAUI, and XFP. Radio technology has made use of transceivers for a long time, although they will often be separate as transmitter-receivers. The Ham radio is a great example and they can be built using the operator’s own equipment. Finally, there is telephony, which uses transceivers via a wired phone or a headset. One such example is the common cellular phone which is, in itself, a transceiver.

The Samsung D900 a contemporary mobile handset

Filed under: Life Of Telecommunication — admin at 2:34 am on Tuesday, July 1, 2008

The Samsung D900 has been really popular with the public making it a success for Samsung With this phone Samsung have produced something wich is reasonably well featured for the price. The Samsung D900 is a very well designed handset with a contemporary feel to it.

The Samsung D900 is fitted to a Li-Ion 800 mAh, battery. On to battery cell usage the Samsung D900 has 260 hours standby time and 6:30 talk time. The D900 has support for 2G GSM 850 / 900 / 1800 / 1900 . A 3.15 MP, 2048×1536 pixels, autofocus, video(CIF), flash is integrated into this phone camera. A WAP 2.0/xHTML compatible browser is also included. The screen is a TFT, 256K colors. This mobile handset is bluetooth enabled meaning it can be used with with a great deal of mobile accessories like hands free sets or a music system. The available ring-tones enabled on the D900 are Polyphonic (64 channels), MP3 along with a vibrating alert. If colour is important to you you may like to know that the D900 comes in, Black, Silver, Blue, Red and Gray. The D900 is 85 g in weight. Compared to other models, the D900 is very small. This phone is also equipped with:

  • TV output
  • Organizer
  • Document viewer (Word, Excel, Powerpoint, PDF)
  • MP3/AAC/ACC+ player
  • Java MIDP 2.0
  • Built-in handsfree
  • Voice memo

    • This is now quite an old phone, but still does a great job. If you can find one, being sold off in a cheap end of line deal it is possible to steal yourself a real buy. The most effective way to purchase a mobile phone these days is from the Internet as opposed to high street shops. Shopping online can save you a significant amount of money, incredibly it is possible to get a one year free line rental deal , which may never cost anything at all.

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