Emulator Software simulates inverse multiplexing.
Press Release Summary:
Suited for automated testing using command line scripts, ATM IMA Emulator simulates inverse multiplexing of ATM cell streams over multiple physical links and retrieves original stream at far end. ATM links can be created on full or fractional timeslots, and traffic source can be sequence number, HDL files, flat binary file, user-defined frames, and Ethernet data. Via GUI, user can add virtual channels to IMA groups to perform traffic generation and verification.
Original Press Release:
GL Announces the Release of ATM IMA Emulator Software
Gaithersburg, Maryland, USA - GL Communications Inc. announced today the release of its new ATM IMA Emulator software.
Speaking to reporters, Mr. Jagdish Vadalia, Senior Product Manager said, "Our Inverse Multiplexing over ATM (IMA) Emulator application can simulate inverse multiplexing of ATM cell streams over multiple physical links and retrieve the original stream at the far-end from these physical links. The multiplexing of ATM cell streams 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 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. This is referred to as IMA grouping."
He added, "The IMA Emulator allows grouping multiple link-layer channels into a single network-layer channel. An IMA group can consist of multiple physical links of the same type. Data sent through this channel will be distributed among all the links. It is a technique used to derive larger bandwidth pipe by aggregating smaller bandwidth pipes e.g. from multiple T1s or E1s. Each IMA group can be configured with IMA Frame Length (equal to 32, 64, 128 or 256) and Group Symmetry modes. Users are also allowed to create/delete Virtual Channels to generate/receive traffic on the created virtual channels.
The applications' GUI provides options to add virtual channels to IMA groups to perform traffic generation and verification. Tx parameters are used to generate the ATM traffic and Rx parameters are used as reference to verify the received frames. The results of the verification are displayed in Tx/Rx Verification tab. The parameters for each VC are independently set."
Mr. Vadalia further added, "When the emulator is configured to act as bridge between two networks, all traffic received from the network is encapsulated into AAL5 cells and then are streamed over T1 E1 links. The Emulator on another network removes the ATM header, converts to Ethernet and streams to the destination."
Main Features:
o Performs IMA simulation on up to 16 T1/E1 ports
o ATM links can be created on full or fractional timeslots
o Supports hyper channels with discontinuous (sparse) timeslots
o IMA Frame Length can be set equal to 32, 64, 128, or 256
o Dynamically add/remove (Open/Close) of ATM links without loss in data
o Multiple IMA groups can be created with each group configured with multiple virtual channels for traffic tx/rx.
o Generate and verify end to end traffic on each Virtual Channel
o User configurable ATM Packet size.
o Payload traffic generation and verification using Sequence number, HDL file (containing packets/frames), Flat Binary file, and User defined frame (ASCII HEX file) for each Virtual Channel independently
o Transmit and receive Ethernet traffic over T1E1 links by operating either in bridge mode
o Provides detailed statistics for all IMA groups and each Virtual Channel associated with a group
o Provides end to end traffic verification statistics
o Ideal solution for automated testing using command line scripts
About GL Communications Inc.,
Founded in 1986, GL Communications Inc. is a leading supplier of test, monitoring, and analysis equipment for TDM, Wireless, IP and VoIP networks. Unlike conventional test equipment, GL's test platforms provide visualization, capture, storage, and convenient features like portability, remotability, and scripting.
GL's TDM Analysis & Emulation line of products includes T1, E1, T3, E3, OC-3, OC-12, STM-1, STM-4, analog four-wire, and analog two-wire interface cards, external portable pods, and complete system solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (ISDN, SS7, GR-303, Frame Relay, HDLC, V5.X, ATM, GSM, GPRS, LTE, etc.), and with capacities up to thousands of channels. Our newest products provide astonishing capacity and capture capability up to and including gigabit speeds.
GL's VoIP and IP products generate / analyze thousands of calls and traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax. Almost all codecs are supported including G.711, G.729, AMR, EVRC-A,B,C, GSM, iSAC, and many more. Additional features include visual analysis, real-time listening, and recording. The product line also includes Ethernet / IP Testing capability that simulates and checks frame transport and throughput parameters of Ethernet and IP networks, including delay, errors and other impairments.
GL's Voice Quality Testing (VQT) product line complements all of GL's products. Using ITU-standard algorithms (PAMS, PSQM, and PESQ), GL's VQT provides a widely accepted solution for assessing voice quality in the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, OC-12, VoIP, Wireless, and Landline) are all available.
GL's Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and LTE networks. Connections can be made to any wireless phone with automated call control, GPS mapping and real-time signal measurements.
GL's Echo Canceller testing solutions provide the broadest range of simulation and analysis, including line and acoustic echo. GL's compliance testing per G.168. G.167, and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.
GL's wireless VQT solutions help assessing impairments to voice quality such as poor mobile phone quality, voice compression and decompression algorithms, delay, loss and gain in speech levels, noise, acoustic and landline echo, and other distortions are easily assessed and accurately measured.
GL's Handheld data testers can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU, DSUs, T1 CSUs, DTUs, NTUs and TIUs and more. The testers provide convenience, economy, and portability for almost any interface, including RS232, RS-422, RS-530, X.21, T1, E1, T3, E3, and many others.
GL's Network Surveillance and Monitoring products include Probes for TDM, IP, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network characteristics. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.
