It is extensively known that there are three famous brands of optical communication industry, Cisco, H3C and Huawei, whose products take the full advantage of popularity of brand. While the real needs of consumers are easier to be ignored, what do they most care about in fact? Is that Brand or Price? In my view, It is the comprehensive cost performance of products.
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Nowadays, an increasing number of customers takes the compatibility huawei tablet into their consideration, as a result of the fact that the OEM fiber optic transceivers are extremely expensive at price and the second-hand ones usually can not be used over half a year even though the price is low. In spite of compatible products getting popular, there also exists differences in their performance and prices due to the different chips and techniques used by different manufacturers. So here we work out some useful tips to help you have a happy purchase.
How to choose a proper fiber optic transceiver?
1. The after-sales service
Generally, fiber optic transceivers can be used at least for 5 years. For most of them, people can not tell their real performance until the second or third year of use. Therefore, if you buy this product for the first time, you can choose providers with longer warranty. And if it's not the first purchase, you should know the after-sales service is pretty important for a cost-effective purchase. Especially when there is trouble with the product, it is a good chance to identify if you had a right choice. So make the most use of your experiences on after-sales services, which will give you useful points.
2. Compatibility between fiber optic transceiver and device
Because of the diversity of device from different manufacturers, the compatibility between transceiver and device becomes one of the major issues for consumers. This issue can be easily solved through communicating with providers prior to purchase, and you are also suggested asking for a test of the true device before shipping, thus you will have a more accurate evaluation.
3. Compatibility
Types of fiber optic transceivers are getting richer, but the compatibility between different types always makes more or less effect on the network. It should be known that this product is standardized in terms of the related international criteria, so compatibility is not a problem as long as products meet with the criteria and are certificated by FCC.
4. Temperature adaptation
The generated temperature inside fiber optic transceivers is low, while they are more often used in the Switches and computer room, which causes the temperature get high or lower. When temperature gets too high or too low, it will affect the parameters such as optical power, optical sensitivity and so on.
The Blackberry 8520 Purple underlines Blackberrys attempts to make their handsets appeal to a broader spectrum of consumers.
For a long time, the word Blackberry has been synonymous with phones with excellent connectivity options, and this is still the case with the 8520 Purple despite the downscaling. The most attractive example of this is the inclusion of WIFI on the phone, enabling the user instant connection to the internet as long as they are in a WIFI hotspot or connected to a router. Although not offering a 3G facility, the WIFI inclusion goes some way to compensate for this. Bluetooth is also catered for as you would expect as is a micro USB port.
When it comes to using the internet, the Blackberry handles the task very well. Navigation is achieved via the new touch sensitive trackpad. The trackball which was included on many of this handsets predecessors was not without fault, mainly that sometimes it did not respond. This new Trackball is a welcomed upgrade and seems to work very well. Blackberrys own internet browser interface is installed on the phone to make navigation easy. Also pre installed is the Blackberry App World, offering the user access to a whole range of various applications.
The Blackberry 8520 Purple does impress with its battery life. The supplied Lithium ion battery offers up to 17 days in standby and 4.5 hours of talktime. A 3.5mm headphone jack is also a welcome addition on the handset, allowing the user to use their own choice of headphone when listening to their audio files. On the subject of music, the Blackberrys media player as ever works very well. A range of audio formats including MP3, AAC and WMA. On top of the phone you will find 3 dedicated music buttons, designed to make using the phone as an audio player an altogether pleasant and easy experience. Video playback is also supported with MPEG4 and WMV files catered for.
The 2.46" screen displays characters very clearly thanks to its 320 x 240 resolution, despite this being lower than the 480 x 360 that the 8900 featured. This screen covers about half of the front of the handset, the trademark qwerty keypad taking up the other half. This keypad is what attracts many Blackberry users to the device due to the ease of composing messages. Sandwiched between the screen and the keypad is where the touchpad is located. Overall the unit weights just 106 grammes.
The Blackberry 8520 Purple features everything you would expect of such a handset, great connectivity, easy to use keypad and stylish looks. This phone will appeal to the average phone user who wants just a little bit more from their handset, and at an attractive price.