Communications

GL Enhances T1 E1 Applications with Bulk Delay and Error Insertion

27th June 2011
ES Admin
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

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