Synway Information Engineering Co., Ltd
The self-adaptive echo cancellation feature gives the board the capability of 64ms echo
cancellation so as to effectively eliminate echoes under various conditions, canceling out
the effect of voice playback on DTMF and busy tones detection, avoiding self-excited
oscillation and howling, and minimizing the possibility of registering wrong DTMF and busy
tones in a conference call, designed especially for VoIP application environments.
z
Voice CODEC Support
Supports A-law,
μ
-law codecs.
1.2 Operation
Principle
Figure 1-3 Operation Principle
Inbound PCM Data
Mother Board
Echo
Outbound PCM Data
PCM Interface
Recording
Playback
Host Computer Interface (PCI)
Synway TEJ Series Hardware Manual
（
Version 1.0
）
Page 3
