Characteristics:
1) 10/20/30 channels audio input supported in single board
2) 1pc supports 4 cards, that 1pc supports 120 channels real-time audio
3) Compression format: G.723, G.729 (optional)
4) Sampling radio: 8K, 16K, 32K (optional)
5) Multifarious recording audio mode: timed recording manual recording,
auto recording (be activated by sound)
6) Supports listen in, recorded audio data backup functions
7) Multifarious network can be supported such as LAN, ADSL, PSTN, DDN, GPRS,
CDMA 1X