VoIP Gateways

Telebyte, a DSL (digital subscriber line) physical-layer testing solution supplier, has released the VxT-N48 48-channel AWGN Generator/Injector.

The device provides complex noises needed for next-generation vectoring-enabled tests. It also interfaces between CO or CPE equipment and the Telebyte VxT-48 xTalk Emulator for VDSL2 vectoring testing.

Because it generates 48 channels of built-in, uncorrelated, AWGN (Additive white Gaussian noise) it can test for any xDSL application needing “flexible, dense noise generation and injection,” the company said.

“A vectoring test solution is not complete without complex noise,” Michael Breneisen, president at Telebyte, explained in a statement carried by TMCnet. “Noise can come from several sources outside of copper transmission lines such as impulse noises from appliances being turned off and on, RFI (News - Alert) from radio stations and crosstalk from non-vectored loops within the same binder or cable. Vectoring doesn’t cancel these noises and can actually amplify them. It is essential that these noises are included in the test setup if you want a more realistic assessment of signal quality.”

Interference needs to be mitigated to improve quality of service by service providers. In the past, some providers just “relied upon cable farms alone for testing, leaving them unable to verify fully that complex noise has been dealt with and quality is acceptable. With Telebyte’s growing suite of test gear designed specifically for this purpose, Service Providers now have a solution to help them accelerate their vectoring rollout with confidence,” the company said in a statement.

Telebyte’s products provide automated transparent switching, crosstalk emulation, local loop simulation and noise generation, the company explains in an online statement. The company’s solutions are used too for physical-layer tests of xDSL technology. xDSL includes ADSL and SDSL. There are also high-data-rate DSL (HDSL) and very-high DSL (VDSL). They are often called last-mile technologies because they are found between a residence or office and a telephone switching station, according to online statements.