Product category:
EMC Components
News Release from: Pulse | Subject: Excelsus DSL filters
Edited by the Electronicstalk Editorial
Team on 13 June 2006
DSL filters pass the test of IPTV
Successful tests demonstrate error-free transmission of video, data and voice over VDSL2 in difficult "ring trip" conditions.
Pulse and Comtrend Corp, a leading supplier of DSL equipment, have revealed the results of their Internet Protocol television (IPTV) over VDSL2 testing Pulse is also owner of the popular Excelsus DSL filter brand
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
Related stories
New choke eliminates common mode noise
Pulse's ChipChoke series for USB2.0 standard applications are said to eliminate common mode noise in high-speed networks.
Transformer boosts reliability and performance
Pulse, a Technitrol Company, has introduced the C2139NL RF balun transformer for radio frequency (RF) applications ranging from 5 to 1000 megahertz (MHz) bandwidth.
The successful tests demonstrated error-free transmission of video, data and voice over VDSL2 in difficult "ring trip" conditions.
This technical breakthrough overcomes a major problem for telephone companies delivering IPTV over traditional phone lines.
When analogue voice and digital video signals are transmitted simultaneously over VDSL2, there can be interference caused by ringing voltage or "ring trip".
This may occur when a ringing telephone is answered and can corrupt the video, creating unacceptable video quality.
The technical challenge has been to eliminate the video errors while maintaining DSL transmission rate and signal quality.
The interoperability tests were conducted last month at Broadcom's design lab in Mechelen, Belgium.
Broadcom's test network included outside plant twisted-pair phone lines and coaxial cable.
Comtrend featured its CT-5371 VDSL2 multimode DSL router based on Broadcom's VDSL2/ADSL2+ CPE and CO chipsets.
Pulse provided a variety of components including the Excelsus CP-V413 splitter circuitry and Pulse's multiport splitter design for central offices (COs).
The test setup replicated conditions typically found in customer premises and CO environments.
Under these conditions, the test results showed no bit rate errors.
"In a VDSL2 network transmitting video, the performance of modems, routers, and splitters is critical".
"Error-free performance from these devices in the presence of ring trip is key for the delivery of high quality IPTV services", said Greg Gough, Pulse's Staff Systems Engineer.
"Together Pulse and Comtrend have addressed the challenge of VDSL2 performance during ring trip", said Joe Maier, Comtrend's Director of Technology.
Based on these positive test results, products from Pulse and Comtrend are now available for field tests in the public switched telephone network (PSTN).
• Pulse: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
