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Overview

TRAU (Transcoder/Rate Adaptor Unit) at the A-bis interface (BTS to BSC links), and A-ter interface (BSC to MSC links) performs transcoding (speech compression, decompression) for speech channels và data rate adaptation (RA) for data channels within the radio cellular network. This enables the use of lower rates (16 or 8 kbps) over the A-bis interface instead of the 64 kbps.

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The information between the Channel Codec Unit (CCU) and the remote TRAU is transferred in "TRAU frames" for every trăng tròn ms, which has both the speech/data & the TRAU associated control signals are transferred.

onfire-bg.com"s TRAU Toolbox™ is an igiảm giá khuyến mãi tool to lớn chạy thử network elements at A-bis and A-ter interface. The tool can be used to create, monitor, và terminate multiple TRAU/GSM traffic (TRAU sessions). Once the TRAU session is created, different kinds of audio/voice/digits can be generated and analyzed on GSM Gọi with various codecs. TRAU Toolbox™ can emulate TRAU node at BSC/MSC end or CCU node at BTS over including the compression/decompression of speech that takes place at TRAU side or di động side. TRAU frames are time-aligned according to lớn control information. The traffic generated by a BTS is transported khổng lồ the corresponding BSC across a network is referred khổng lồ as the backhaul network. The TRAU Toolbox™ can be used to lớn test this backhaul network.

Main Features

Used lớn demo the backhaul network. Users can create TRAU GSM traffic sessions by specifying the device number, channel & subchannel. Can create multiple sessions of Upliên kết or downlinks in 8/16 Kbps Work on 3 modes: Transmission (Tx) side or only Receiving (Rx) side or both Rx & Tx. Supports speech codec for verification of correct voice transmission which includes GSM codecs such as GSM 6.10(FR), Half Rate (HR), Enhanced full rate (EFR), Adaptive multi Rate (AMR - Rates 4.75, 5.15, 5.90, 6.70, 7.4, 7.95, 10.2, và 12.2 kbps), Adaptive Multi Rate-Wide B& (AMR-WB Rates 6.60, 8.85, 12.65 kbps) and Data, Data 14.5kbps Sync, và Data 14.5kbps(Extended Data). Phase Alignment can be applied to AMR or AMR-WB modes khổng lồ change the mode lớn the requested modes. Logical AND, OR or XOR impairments can be applied lớn a TRAU frames. Idle speech frames can be generated in case of GSM and EFR downliên kết codec if there is no speech frames to transmit. Capability lớn apply DTX khổng lồ EFR and AMR codec Supports Loopback and Pass Through modes Time Alignment Delay or advance can be inserted in the TRAU frames. Graphical display features include the ability to monitor TRAU stream contents using an oscilloscope and spectrum analyzer. Other features allow the user to lớn generate và analyze kiểm tra tones, in-bvà signaling tones such as DTMF, MF, MFR2, playbaông xã and record voice files.

Applications for Data Transmissions


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The following are the TRAU Toolbox™ applications that are used to transfer data on the specified TRAU sessions:

Talk Using Microphone Playbaông xã from File Digit/Tone Generation

The Talk using Microphone application is used to transmit the real-time voice generated using the default audio device (microphone) on the selected TRAU session. Similarly, the Playback from File applications allows the user lớn skết thúc voice files, *.WAV, và *.PCM files. The Digit/Tone Generation application allows the user to skết thúc standard or user-defined tone or digits on a session.

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The following are the TRAU Toolbox™ applications used to lớn capture data:

Play lớn Speaker Record data khổng lồ tệp tin Capture/Digits Tones

The Play to Speaker application will play the incoming voice directly lớn the system"s speaker. On the other h&, the Record Data lớn File application can record the incoming data on a session to lớn a file. The recorded file will be in linear PCM (16-bit linear) format. Capture Digits/Tones allows the user khổng lồ detect digits & tones. It provides option to view all activities or just the captured digits.


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The following are the Monitoring Applications used to monitor the data reception:

Oscilloscope Spectral Display

Oscilloscope displays the PCM codes (amplitude of the incoming signal) for any selected session graphically in real-time as a function of time.

The data received on a specified receive sầu timeslot can be viewed in the spectral domain (spectral amplitude Vs frequency) using Spectral Display application. A Fast Fourier Transform (FFT) is applied lớn successive sample sets of the incoming data và displayed in graphic form. Using FFT length the frequency resolution can be adjusted from 32 points to lớn 8192 points


Resources

Please Note: The XX in the Item No. refers to lớn the hardware platsize, listed at the bottom of the Buyer"s Guide, which the software will be running on. Therefore, XX can either be ETA or EEA (Octal/Quad Boards), PTA or PEA (tProbe Units), UTA or UEA (USB Units), HUT or HUE (Universal Cards), and HDT or HDE (HD cards) depending upon the hardware.

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Other Related TRAU Applications Related Hardware
Item No. Item Description
XX153 T1/E1 Real-time TRAU Protocol Analyzer
TRAU Traffic Playback
TRAU Toolbox™
OLV153 Offline TRAU Analyzer
XX646 Multi-Channel TRAU Tx/Rx Emulation and Analysis
HDT001/HDE001 Legacy HD T1 or E1 (PCI) Cards with Basic Analyzer Software
HTE001 Universal T1/E1 Card with Basic Analyzer Software
UTE001 Portable USB based Dual T1 or E1 Laptop Analyzer with Basic Analyzer Software

Brochure/ Presentation
t1e1 trau xanh protocol analysis emulation brochure
Sample Messages
Product Presentation
Training Presentation


Chuyên mục: Công Nghệ 4.0