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Basic principle
IFC technology from BroadU is designed to detect, analyze and compensate interference on twisted pair telephone
cables.
Problem description
Different signals transported over a copper cable bundle (e.g. ADSL, SHDSL, analog telephony) influence one another due to crosstalk. Particularly with DSL, this results in transmission errors, reduced
range and lower data speeds.
BroadU’s solution
IFC technology from BroadU is designed to detect, analyze and compensate the disruptive influence of crosstalk within the cable bundle. This makes for more stable DSL transmission along with greater range and higher data
speeds.
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During transmission of DSL signals over a cable bundle, interference occurs as the xDSL signals travel from the main distribution frame (MDF) to the different companies and homes via the twisted pairs within the main cable. The main cable can contain more than one hundred twisted
pairs.
Crosstalk interference is rare when the cables are used to transport analog or digital telephony signals. However, such interference grows as xDSL signals become more common due to their significantly higher frequencies. The problem is that most of the cables were laid years ago and were not designed to transport
xDSL.
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Interference compensation using IFC technology is “plug & play”: Simply connect the IFC unit to the telephone lines to be optimized. The unit will immediately detect any interference from the adjacent pairs affecting the xDSL signal. The IFC unit computes an inverse compensation signal, which is then fed in real time into the twisted pair to be optimized. The result is increased range, bandwidth and stability for the xDSL data
signal.
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Analogy from the world of acoustics
Ambient noise can be very disruptive when you are listening to music. However, an integrated noise compensation system in your headphones is capable of dynamically adapting the music to the ambient noise for perfect clarity. IFC technology from BroadU works in an analogous manner: However, it handles DSL signals and interference from adjacent twisted pairs as opposed to music and ambient
noise.
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IFC: The DSL booster
- Maximum transmission rate +100%
- Maximum range +100%
- Maximum cable usage +40%
- More stability
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- About 5 billion kilometers of copper cable is installed around the world for use in telephony applications
- These cables have an average age of 15 years
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- IFC is easy to deploy due to the plug & play design of the modules
- No software installation, special matching or calibration is required
- Interference compensation works independently of the xDSL technology
(ADSL, SHDSL, VDSL, etc.)
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