Ads
related to: sim900a gsm module description and price
Search results
Results from the WOW.Com Content Network
The history of the GSM module dates back to the 1980s when the GSM network was first introduced. The first GSM module was designed to work with analogue phones, and it was not until the late 1990s that digital GSM modules were introduced. Today, the GSM module is an essential component used in various communication systems.
The Global System for Mobile Communications (GSM) is a family of standards to describe the protocols for second-generation digital cellular networks, [2] as used by mobile devices such as mobile phones and mobile broadband modems. GSM is also a trade mark owned by the GSM Association. [3] "GSM" may also refer to the voice codec initially used ...
A base transceiver station (BTS) or a baseband unit [1] (BBU) is a piece of equipment that facilitates wireless communication between user equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless Internet connectivity, or antennas mounted on buildings or telecommunication towers.
GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM. Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.
Siemens A52: monochrome, GSM 900 / GSM 1800, no GPRS, no USB, IrDA or Bluetooth. [10] Same as A55/A56; Siemens A53; Siemens A55: monochrome, GSM 900 / GSM 1800, no GPRS, no USB, no IrDA or Bluetooth. Shares same hardware as C55 and can be upgraded to C55 by firmware flash. Siemens A56: monochrome, GSM 850 / GSM 1900, no GPRS, no USB, no IrDA or ...
Qualcomm MSM8230AB Snapdragon 400 (GSM), Qualcomm MSM8930AB Snapdragon 400 (LTE) 5MP: Batman: Nokia Lumia 1520: 6" IPS: Nokia world 2013: D: Windows Phone 8:
The GSM standards are defined by the 3GPP collaboration and implemented in hardware and software by equipment manufacturers and mobile phone operators. The common standard makes it possible to use the same phones with different companies' services, or even roam into different countries. GSM is the world's predominant mobile phone standard.
UMTS phones can use a Universal Subscriber Identity Module, USIM (based on GSM's SIM card) and also work (including UMTS services) with GSM SIM cards. This is a global standard of identification, and enables a network to identify and authenticate the (U)SIM in the phone.
Ads
related to: sim900a gsm module description and price