Press Release: GL Enhances T1 E1 Applications with Bulk Delay and Error Insertion
Gaithersburg, Maryland, USA - June 27, 2011 - GL Communications Inc., announced today the release of its enhanced
T1 E1 applications with Bulk Delay and Error Insertion. Speaking to newsmen, Mr. Vijay Kulkarni CEO of the company said, "The Bulk Delay and
Error Insertion application permits inserting single, fixed, automatic, random, and burst errors into the incoming bit stream. This application also
includes a Bulk Delay feature that allows delay to be applied to the entire T1 E1 trunk of 1.544Mbps (T1) pipe or 2.048 Mbps (E1) pipe. Delays and
errors can be different for different directions”.
He added, “Simulating bulk delay and errors like that found in real networks can help optimize the performance of applications. For example:
- At what delay does the application under test suffer throughput degradation due to ARQ – Automatic Repeat Requests
- At what error rates does voice performance on compressed codec circuits start to degrade.
- How good is error correction when the underlying uncorrected error rate is 10E-5
- How can I simulate the error characteristics of a microwave circuit, a copper T1 line, a fiber optic transmission line
- Does encryption multiply the inherent error rate of the circuit and by how much?”
Mr. Kulkarni further added, “When the Bulk delay and error insertion feature is used in conjunction with “Cross Port Transmit”, introducing
delays and errors is extremely easy. As depicted in the below diagram, the data that would normally be transmitted on Card 1 (Port 1) is diverted
and transmitted on Card 2 (Port 2) and the data that would normally be transmitted on Card 2 (Port 2) is diverted and transmitted on Card 1 (Port 1).
The receive paths are completely unaffected. This feature also eliminates complex cabling.”
Other Features Include
- Automated Random Errors can be inserted at a rate ranging from:
- BPVs 10E-4 to 10E-9
- Logic Errors 10E-2 to 10E-9
- Frame Errors 10E-2 to 10E-9
- CRC Errors 10E-2 to 10E-9
- FDL Errors 10E-2 to 10E-9
- Delay can be varied from 0 to 169.77mS (T1) or 127.99mS (E1) with an accuracy of ± 10uS
- The bulk delay range can be extended further by other software based applications such as the Delay / Attenuate application
For comprehensive information on the application, please refere to the Bulk Delay and Error Insertion webpage.
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
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
For more information about GL's complete line of products,
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