GL Communications, Inc. TRAU Toolbox™

TRAU Toolbox™ is an ideal tool to test network elements at A-bis and A-ter interface. The tool can be used to create, monitor, and 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 call with various codecs. TRAU Toolbox™ can emulate TRAU node at BSC/MSC end or CCU node at BTS end including the compression/decompre ssion of speech that takes place at TRAU side or Mobile side. TRAU frames are time-aligned according to control information. The traffic generated by a BTS is transported to the corresponding BSC across a network is referred to as the backhaul network. The TRAU Toolbox™ can be used to test this backhaul network. 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 and 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. The information between the Channel Codec Unit (CCU) and the remote TRAU is transferred in "TRAU frames" for every 20 ms, which has both the speech/data and the TRAU associated control signals are transferred. GL's TRAU Toolbox™ is an ideal tool to test network elements at A-bis and A-ter interface. The tool can be used to create, monitor, and 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 call with various codecs. TRAU Toolbox™ can emulate TRAU node at BSC/MSC end or CCU node at BTS end including the compression/decompre ssion of speech that takes place at TRAU side or Mobile side. TRAU frames are time-aligned according to control information. The traffic generated by a BTS is transported to the corresponding BSC across a network is referred to as the backhaul network. The TRAU Toolbox™ can be used to test this backhaul network. Main Features Used to test the backhaul network. Users can create TRAU GSM traffic sessions by specifying the device number, channel & subchannel. Can create multiple sessions of Uplink or downlink 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, & 12.2 kbps), Adaptive Multi Rate-Wide Band (AMR-WB –Rates 6.60, 8.85, 12.65 kbps) and Data, Data 14.5kbps Sync, and Data 14.5kbps(Extended Data). Phase Alignment can be applied to AMR or AMR-WB modes to change the mode to the requested modes. Logical AND, OR or XOR impairments can be applied to a TRAU frames. Idle speech frames can be generated in case of GSM and EFR downlink codec if there is no speech frames to transmit. Capability to apply DTX to 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 generate and analyze test tones, in-band signaling tones such as DTMF, MF, MFR2, playback and record voice files.