GL’s T1 E1 ATM Bit Error Rate Test (BERT) application permits BER testing across an ATM channel operating over PDH circuits.
Gaithersburg, Maryland (PRWEB) March 08, 2012
GL Communications Inc. a leader in providing PC-based test, analysis and simulation products and consulting services to the worldwide telecommunications industry, conveyed today the availability of its product ATM BERT software.
Speaking to the press, Mr. Vijay Kulkarni CEO of the company said, “GL’s T1 E1 ATM Bit Error Rate Test (BERT) application permits BER testing across an ATM channel operating over PDH circuits. The application transmits a BERT pattern using the simplest ATM Adaptation Layer, i.e. AAL0. The BERT pattern is inserted in its entirety into the 48 byte payload of the cell. This is shown graphically below. Cells are either “BERT payload” or “idle” cells. Note that “cell headers” and payload can overlap the framing position.”
He added, “In contrast to traditional BERT, ATM BERT is done at the ATM layer and can be performed all of the way across the virtual circuit to the far-end customer-premise site. Often, user traffic may be routed through several CO sites before reaching the first ATM edge switch. Each of these additional routes adds to the potential for errors. Traditional BERTs may only verify the local loop to the first CO and neglect to verify the connections between the intermediate COs. Thus ATM BERT allows for end-to-end verification of the circuit’s reliability.”
Mr Kulkarni further added, “The application allows traffic generation and verification, bit error insertion, looping back incoming traffic, and configuring ATM header fields such as virtual path and circuit identifier values, GFC, PT, and CLP for UNI & NNI interfaces. And it is capable of testing Pseudo Random Bit Sequence (PRBS) patterns, fixed patterns like all ones, all zeroes, alternate ones & zeroes, 1:1, 1:7, and user-defined bit patterns. In addition, single bit error insertion rate, error insertion from 10-2 to 10-9, invert, and scrambling options are provided for payload.”
·Capable of generating/receiving ATM traffic
·Support user-defined ATM header configuration for GFC, VPI, VCI, PT, CLP
·User-defined traffic rate to the accuracy of 1% of total bandwidth
·Supports different QRSS, PRBS patterns 29-1, 211-1, 215-1, 220-1, 223-1, All one’s, All zero’s, alternate 1’s and 0’s, 1:1, 1:7, & User-defined patterns. User defined patterns length can be 3 to 32 bits in length
·Supports inverting, and scrambling payload data. Scrambling is according to ITU-T G.804
·Supports single bit error insertion, and error rate insertion
·Provides ATM QoS measurement (Bit error count/ Rate/Seconds, Sync Loss, No Rx data,… )
·Provides ATM Statistics (total cell count, rejected / pass / idle cell counts, cell rate, and HEC error count)
·Error and Alarm LEDs for easy analysis
·Supports testing on multiple cards simultaneously with consolidated result view
·Tx and Rx settings for multiple cards can be independently controlled or coupled
·Capability to save and load the configuration settings
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) is 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.