MT9123 Overview
The MT9123 Voice Echo Canceller implements a cost effective solution for telephony voice-band echo cancellation conforming to ITU-T G.165 requirements. The MT9123 architecture contains two echo cancellers which can be configured to provide dual channel 64 millisecond echo cancellation or single channel 128 millisecond echo cancellation. The MT9123 operates in two major modes:.
MT9123 Key Features
- Dual channel 64ms or single channel 128ms echo cancellation
- Conforms to ITU-T G.165 requirements
- Narrow-band signal detection
- Programmable double-talk detection threshold
- Non-linear processor with adaptive suppression
- Offset nulling of all PCM channels
- ST-BUS or variable-rate SSI PCM interfaces
- Selectable µ/A-Law ITU-T G.711; µ/A-Law Sign
- Per channel selectable 12 dB attenuator
- Transparent data transfer and mute option