topblog Ivoire blogs

27/02/2013

ZTE MF880 and MF820T 4G LTE TDD USB Modem

As one of the most important 4G vendors, ZTE has released many 4G LTE modems. ZTE MF820T and MF880 are two of the popular TDD models.  

 

Just like other 4G LTE modems from ZTE, ZTE MF880 and MF820T followed the same design as ZTE MF820 4G LTE FDD Surf stick. The modem body is a little bit larger than usual 3G USB stick. And taking them in hand, users can feel the weight is more than 3G modems.

 

   

 

What is a pity that both ZTE MF820T and MF880 don't have the connectors for external antenna. Perhaps at the big inning when engineer designed the mode, they didn't take this factor into their blueprint. As we can see, in the serials of ZTE MF820D, MF821, MF821D, MF820S2, MF820T, MF880, they all incorporates no antenna ports. As the key features of MIMO connection, we are afraid it may not be as good as the modems with MIMO antenna for data transmission.

    

 

ZTE MF820T and MF880 both work for 4G LTE TDD network, perhaps due to for different providers, they support different TDD frequency bands as below:    

 

ZTE MF820T 4G LTE TDD Single Mode USB Modem:

* Single mode LTE TDD 2300/2600MHz  

 

ZTE MF880 4G FDD TDD USB Modem:

* FDD 800/2600MHz

* TDD 2300/2600MHz

* DC-HSPA+/HSPA+/HSPA/UMTS 2100/900MHz

* EDGE/GPRS/GSM 850/900/1800/1900MHz

   

This should the key difference between ZTE MF820T and MF880. Per current information, ZTE MF880 had need presented to public under provider "3" from UK. And ZTE MF820T should be for China Mobile. What should focus is that ZTE MF880 could also support FDD LTE band 800/2600MHz. It means MF880 could switch between FDD and TDD networks, so ZTE MF880 is somewhat like a enhanced ZTE MF820T.      

 

Regarding the data transmission speed, they both support download speed at 68Mbps and upload at 17Mbps under TDD –LTE network. ZTE MF880 seems more powerful because when working at FDD network, the peak speed could reach to 100Mbps for downlink while uplink could reach 50Mbps.  

 

In conclusion, ZTE MF880 seems more powerful than ZTE MF820T, so if you want to want buy ZTE 4G LTE TDD USB Modems, welcome to www.4gltemall.com    

13/02/2013

LTE Dongles, CPE and Modules for Band 38(2.5-2.6GHz)

Band 38 is one of the most popular bands for TD-LTE network, the running spectrum is 2570-2620 MHz, usually, people would like to say it band 26000MHz. And it’s 50MHz.

Below are the UE that could work for Band 38(TDD LTE 2600 MHz):

LTE CPE:

1.      Asiatelco ALR-W190, indoor, b38, b40.. 2012.09..

2.      Asiatelco ALR-W191, indoor, b38, ..2012.09..

3.      Nokia Siemens Networks CPE outdoor 7210, 2012.10

4.      Nokia Siemens Networks CPE indoor 7212, 2012.10

5.      Huawei B593s-82 indoor CPE ..2012.06..

6.      Huawei E593u-91, ..2012..

LTE Surfsticks/Modems/Dongles:

1.      Asiatelco ALT-C180 ..2012.09..

2.      Asiatelco ALT-C186 b38 and b41 ..2012.09..

3.      Asiatelco ALT-C187 b38 and b39 ..2012.09..

4.      Huawei E392-92 multiband ..2012.09..

5.      ZTE MF820S2 ..2012.09..

Modules:

  1. ZTE MF291 LTE modul, 2012.10,

Below are the operators worldwide for Band 38 (TDD 2600MHz):

Commercial systems:

1.      Brazil, Sky Brasil Servicos

2.      Japan, Softbank Mobile XGP/LTE

3.      Poland, Aero2

4.      Russia, MTS, 2012.09-.. 25 MHz, 2595-2620 MHz (Moscow and Moscow region only, to launch LTE network before Dec.29, 2013, the concession is valid until Dec.29, 2016)

5.      Saudi Arabia, Mobily

6.      Sweden, 3 Sweden

Planned:

1.      Austria, 3 Austria, tests 2012.09

2.      Austria, A1, from 2010.09.20

3.      Belgium, BUCD, 2012

4.      China, China Mobile, 2012.10

5.      Germany, E Plus, 2012.09

6.      Russia, Megafon, 25 MHz, 2570-2595 MHz (Moscow and Moscow region only)

7.      Spain, COTA, plan commercial launch Nov. 2012

26/01/2013

Should You Buy Huawei B683 or Huawei B593?

These days, we found some customers are in trouble of how to Choose the wireless router between Huawei B683 and B593?  

 

Frankly speaking, it's a good question for those users who are committed to Huawei brand. Based on reliable quality and performance in network connection, Huawei routers had crashed to CISCO   WLAN routers to some extent.

 

Then how to determine which router among Huawei routers? Take Huawei B683 and B593 as example, which one is better? For most users who want to buy router, the question should be “which one is appropriate?"  

 

To answer "which one is better" is easy; Huawei B593 is 4G LTE CPE which supports maximum download speed up to 100 Mbps and 50Mbps at uplink. With latest new technology, users could surf at revolutionary speed without latency. The two MIMO antennas can help B593 to reach the fastest possible speed.    

 

However, Huawei B683 3G Wireless Router could only run on 3G UMTS and 2G network, it can't work with 4G LTE network. And the maximum speed could reach only 28.8Mbps, which is only a quarter of speed from B593. There is only one external antenna connector on Huawei B683. So there is no doubt that Huawei B593 is much better than Huawei B683.   But should you buy Huawei B593 rather than Huawei B683?As the professional consult in wireless solution, the writer suggests users should have a second thought and the decision depends.    

 

If you buy the router for SOHO, home or office, in most of cases, Huawei B683 is enough to support the Internet activities based on the current 3G network. According to the practical test for 4G LTE CPE HUAWEI B593, the peak speed can’t reach 35Mbps with good network environment under LTE network. And to use new 4G service, the service fee is not at the similar price as 3G.  

 

There is no doubt that HUAWEI B593 LTE CPE would finally replace HUAWEI B683 Wireless Router. From a long-term point of view, 4G LTE network will become common. Since the LTE is just at the beginning, for the users concerning about the cost, HUAWEI B683 would be appropriate for current usage.

 

If you need router for the wireless network solution in a project, concerning the future network upgrade and function is more important than cost, HUAWEI B593 LTE CPE should be the first option. This LTE CPE B593 is born to meet the industrial applications after time and time test.   Above is my opinion for user’s reference, if you need them, you could check the site www.4gltemall.com for unlocked routers.