GL Communications (News - Alert) Inc., a major player in providing PC-based test, analysis and simulation products and consulting services to the worldwide telecommunications industry, has introduced its product ATM IMA Emulator – Inverse Multiplexing of ATM Cells.
“The Inverse Multiplexing over ATM (IMA) Emulator application can simulate the inverse multiplexing of an ATM cell stream over multiple physical links and retrieve the original stream at the far-end from these physical links,” said Jagdish Vadalia, senior Manager of the company. “The multiplexing of the ATM cell stream is performed on a cell-by-cell basis across the multiple physical links. Traffic source can be sequence number, HDL files (containing packets/frames), flat binary file, user-defined frames (ASCII HEX file), and Ethernet data.”
The ATM Inverse Multiplexing technique, according to Vadalia, involves inverse multiplexing and de-multiplexing of ATM cells in a cyclical fashion among links grouped to form a higher bandwidth logical link whose rate is approximately the sum of the link rates.
This technique provides an effective method of combining the transport bandwidths of multiple links (e.g., DS1/E1 links) grouped to collectively provide higher intermediate rates.
The system is referred to as an IMA grouping.
“Along with AAL0 and AAL5 IMA supports AAL2, which provides bandwidth-efficient transmission of low-rate, short and variable length packets in delay sensitive applications,” said Vadalia. “AAL2 also provides for variable payload within cells and across cells by using segmentation and reassembly technique. AAL type 2 is subdivided into the Common Part Sub layer (CPS) and the Service Specific Convergence (News - Alert) Sub layer (SSCS).”
GL’s ATM IMA Emulator is available as optional client-server based application with GL’s T1/E1 Analysis hardware. GL also offers ATM analysis application for real-time capture and analysis of ATM IMA cells over T1 E1 lines.
TMCnet in August reported that GL Communications also unveiled its enhanced PacketScanWeb, a centralized IP and VoIP switch network monitoring system.
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Edited by Braden Becker