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EF400 Acoustic Echo Canceller
EF200 Digital Phone Add
EF600 Teleconferencer
EF1210 Multi-Channel Echo / Noise Canceller
EF IR10 Infrared Controller
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 Transmission Echo Canceller / Multi-Channel Echo & Noise Canceller
The ASPI EchoFree™ EF1210TEC solves two common problems in multi-site conferencing installations: delayed echoes of local audio which are returned by the transmission path (loopback), or redundant audio in the received signal which is caused by high and low delays in the conferencing network (transmission delay).
The EF1210TEC will cancel echoes which have been transmission-delayed by up to two seconds. In addition to its unique transmission echo cancellation capability, the EF1210TEC provides acoustic echo and noise cancellation on 7 input channels, and works with most vendors' auto-mixing systems.
Acoustic echo and ambient background noise are removed from each channel before the audio reaches the mixer. This ensures the cleanest possible feed for each room in the network.
Click here for an explanation of transmission delay.
Click here for an explanation of looped back audio.
Features:
- Removes transmission-delayed echoes of local audio, or duplicates of received signal caused by varying delay paths
- 7 mic / line level inputs / outputs (phantom power available for each input)
- Works with most vendors' automatic mixing systems
- Individual channel acoustic echo cancellation
- Individual channel DSP noise cancellation (patent pending) removes ambient background noise prior to mixing -- the result is a much cleaner audio feed
- Also removes ambient background noise from received audio signal
- Fast convergence rate of 30dB/sec and long AEC span of 200 ms permit the EF1210TEC's use in challenging environments
- Works in environments with up to 10dB of room gain
- Fully RS232 controllable via AMX®, Crestron®, or other room controllers
Click here for the User's Manual addition for the EF1210TEC (you will also use the EF1210 manual)

Click here to download
the EchoFree™ EF1210TEC spec sheet in
Acrobat PDF format. (2 pages, 217K)
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