Synway Information Engineering Co., Ltd
z
Echo Cancellation
The echo cancellers developed by Synway for these boards use on-board DSPs to work.
TEJ101P/TEJ101E/TEJ201P/TEJ201E supports up to 128ms for time delay estimation per
channel, and TEJ100P/TEJ100E/TEJ200P/TEJ200E supports 32ms, really cost-effective.
It not only cancels out the effect of voice playback on DTMF and busy tones detection, but
also avoids self-excited oscillation and howling, and minimizes the possibility of registering
wrong DTMF and busy tones in a conference call, designed especially for VoIP application
environments.
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Voice CODEC Support
Supports A-law,
μ
-law codecs.
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Clock Sync Support
Supports input and output of CT clock, allowing clock synchronization with multiple boards.
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EMC & Lightning-proof Circuits Available
1.2 Operation Principle
Mother Board
Figure 1-3 Operation Principle
Inbound PCM Data
Echo
Outbound PCM Data
PCM Interface
Recording
Playback
Host Computer Interface (PCI/PCIe)
Synway TEJ100/200/101/201P, TEJ100/200/101/201E Hardware Manual (Version 1.0) Page 3