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  2. TRAU - Wikipedia

    en.wikipedia.org/wiki/TRAU

    The Transcoder/Rate Adaptation Unit (TRAU) is the data rate conversion unit. The PSTN/ISDN switch is a switch for 64 kbit/s voice. Current technology permits to decrease the bit-rate (in GSM radio interface it is 16 kbit/s for full rate and 8 kbit/s for half rate).

  3. Base station subsystem - Wikipedia

    en.wikipedia.org/wiki/Base_station_subsystem

    The interface between the BSC and transcoder. It is a proprietary interface whose name depends on the vendor (for example Ater by Nokia), it carries the A interface information from the BSC leaving it untouched. Gb Connects the BSS to the SGSN in the GPRS core network.

  4. Transcoder free operation - Wikipedia

    en.wikipedia.org/wiki/Transcoder_free_operation

    In a telecommunication network Transcoder free operation, or TrFO, also known as Out of band transcoder control is the concept of removing transcoding function in a call path. In legacy GSM networks a call between two mobile stations involved two transcoding functions, one at each BSC. This transcoding functionality was generally implemented in ...

  5. Base transceiver station - Wikipedia

    en.wikipedia.org/wiki/Base_transceiver_station

    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.

  6. Binary symmetric channel - Wikipedia

    en.wikipedia.org/wiki/Binary_symmetric_channel

    A binary symmetric channel (or BSC p) is a common communications channel model used in coding theory and information theory. In this model, a transmitter wishes to send a bit (a zero or a one), and the receiver will receive a bit. The bit will be "flipped" with a "crossover probability" of p, and otherwise is received correctly.

  7. Osmocom - Wikipedia

    en.wikipedia.org/wiki/Osmocom

    OpenBSC implemented several MSC components, including the A-bis protocol (the protocol between the BTS and the BSC), AUC, HLR, VLR (both using SQL tables), and a SMS Switching Center. OpenBSC can be accessed using telnet. OpenBSC supported the following BTS devices: Siemens BS11 (microBTS) (E1 Primary Rate interface)

  8. Binary Synchronous Communications - Wikipedia

    en.wikipedia.org/wiki/Binary_Synchronous...

    Binary Synchronous Communication (BSC or Bisync) is an IBM character-oriented, half-duplex link protocol, announced in 1967 after the introduction of System/360. It replaced the synchronous transmit-receive (STR) protocol used with second generation computers. The intent was that common link management rules could be used with three different ...

  9. Base station - Wikipedia

    en.wikipedia.org/wiki/Base_station

    In the area of wireless computer networking, a base station is a radio receiver/transmitter that serves as the hub of the local wireless network, and may also be the gateway between a wired network and the wireless network.