Dimensions: 93.8 x 28.6 x 13.5mm
Image Gallery | ZTE MF833U1 Data Stick
Supported Frequency Bands (1)
- FDD-LTE Bands: 1, 3, 5, 7, 8, 20, 28
- TDD-LTE Bands: 38, 39, 40, 41
- DC-HSPA+/HSPA/UMTS Band: 1,2, 5, 8
- EDGE/GPRS/GSM Quad Bands
Band and Frequency Megahertz
FDD 1: 2100 MHz | FDD 3: 1800 MHz | FDD 7: 2700 MHz
FDD 5: 850 MHz | FDD 8: 900 MHz | FDD 20: 800 MHz | FDD 28: 700 MHz
TDD 38: 2600 MHz | TDD 39: 1900 MHz | TDD 40: 2300 MHz | TDD 41: 2500 MHz
FDD: Frequency Division Duplex
FDD needs two separate frequency bands or channels. A sufficient guard band needs to separate the transmitting and receiving channels, so they do not interfere with one another and guarantee clear and uninterrupted transmission. A large guard band does not impact capacity. The frequency allocation for the UL /DL capacity is predetermined based on the system needs so that it is the same in either direction. It is not possible to dynamically change capacity. Continuous transmission and high performance are guaranteed with FDD. (6)
TDD: Time Division Duplex
TDD systems use a single frequency band for both transmit and receive. A system shares the same band and assigns alternative time slots for transmit and receive operations. Any data that is transmitted could be 1 byte long or a frame of multiple bytes. Time slots could be dynamically allocated and variable in length based on network needs. A guard period is needed to ensure that UL and DL transmissions do not collide. Swapping capacities in UL/DL degrades the performance of the network. (6)
Comparison of FDD and TDD
Capacity: TDD radios claim capacity numbers in half-duplex, meaning the quoted numbers are half in one direction and half in the other. So 1Gbps of capacity is actually 500Mbps transmit and 500Mbps receive since the bandwidth is shared in a TDD system.
FDD radios claim capacity numbers in full-duplex, meaning the quoted numbers are available in both directions. Therefore, 1Gbps of capacity is 1Gbps transmit and 1Gbps receive since the bandwidth has separated allocated frequencies for each direction in an FDD system.
Latency: Because TDD radios share the same spectrum for send and receive communications, latencies can be high and variable. Latencies will depend on the time allocation of the spectrum for send/receive and may also be dependent on the size of the packets.
FDD systems, on the other hand, which have dedicated, unshared spectrum, have much lower and more predictable latencies.
Peak Data Rates
- FDD-LTE: DL/UL 150/50Mbps(Cat4)
- TDD-LTE: DL/UL 110+/11+Mbps(Cat4)
- HSPA+: DL/UL 21.6/5.76Mbps
- USB2.0 HS
- UICC, 3FF
Image Source: wikipedia.com(4)
The universal integrated circuit card (UICC), also known as a SIM card, is the smart card (integrated circuit card) used in mobile terminals in GSM and UMTS networks. The UICC ensures the integrity and security of all kinds of personal data, and it typically holds a few hundred kilobytes. (5)
In a GSM network, the UICC contains a SIM application and in a UMTS network, it contains a USIM application. A UICC may contain several applications, making it possible for the same smart card to give access to both GSM and UMTS networks, and also provide storage of a phone book and other applications. (5)
References are provided in APA (7th Edition) (3) Style.
1 ZTE MF833U1 4G LTE USB Dongle. (n.d.). 4G LTE MALL. Retrieved January 31, 2022, from https://www.4gltemall.com/zte-mf833u1.html
2 ZTE MF833U1 4G FDD/TD-LTE Cat4 USB Modem. (n.d.). 4G LTE MALL. Retrieved January 30, 2022, from https://www.4gltemall.com/zte-mf833u-4g-fdd-td-lte-cat4-usb-modem.html
3 Streefkerk, R. (2020, November 5). ZTE MF833U1 4G FDD/TD-LTE Cat4 USB Modem. . 4G LTE MALL. Retrieved January 31, 2022, from https://www.4gltemall.com/zte-mf833u-4g-fdd-td-lte-cat4-usb-modem.html
4 File:GSM Micro SIM Card vs. GSM Mini Sim Card. (n.d.). Wikipedia. Retrieved January 31, 2022, from https://commons.wikimedia.org/wiki/File:GSM_Micro_SIM_Card_vs._GSM_Mini_Sim_Card_-_Break_Apart.svg
5 Universal integrated circuit card. (n.d.). Wikipedia. Retrieved January 31, 2022, from https://en.wikipedia.org/wiki/Universal_integrated_circuit_card
6 Understanding FDD vs. TDD Microwave Systems. (2019, September 18.). Aviat Networks. Retrieved February 01, 2022, from https://blog.aviatnetworks.com/technology/understanding-fdd-vs-tdd-microwave-systems/