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MT8924AS Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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MT8924AS Datasheet(HTML) 1 Page - Mitel Networks Corporation |
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1 / 14 page  8-3 ® Features • Supports up to 10 independent conferences for up to 32 PCM Voice Channels • ST-BUS compatible 2.048 Mb/s PCM Serial Interface (also supports 1.536 Mb/s and 1.544 Mb/s data rates) • Per channel digital gain control (0/-3/-6 dB) • Parallel microprocessor port for device control • Programmable noise suppression • External Tone Input • Pin selectable A/ µ-Law format • Low power CMOS technology • Available in 24 Pin PDIP and SOIC packages Applications • Digital PBX / KTS • Conference bridges • Digital C.O. switches Description The MT8924 is designed to provide conference call capability in digital switching systems. It allows up to 10 independent conferences to be set for up to 32 PCM voice channels. A/ µ-Law companded data from the PCM input port is converted to linear format, processed by a dedicated arithmetic unit, re-converted to companded format and then sent to the PCM output port.The PCM output signal contains all the information of each channel connected in conference except its own. Programmable attenuation and noise suppression are provided for channels connected in conference or transparent mode. Additionally, an input for an external tone is featured that can be used as a signal to indicate to connected parties that they are on a conference call. Figure 1 - Functional Block Diagram ISSUE 1 April 1994 Parallel-to-Serial Conversion Conversion Linear to µ/A-Law µ/A-Law to Linear Attenuation/Noise Suppression Channel RAM Serial-to-Parallel DSTo DSTi Cki F0i Cko D0-D7 TD TF OS A/ µ RESET WR RD CS C/D Overflow and Adder Timebase PCM Tone Control Ordering Information MT8924AE 24 Pin Plastic DIP MT8924AS 24 Pin SOIC 0°C to +70°C Generator PCM Mode Control MT8924 PCM Conference Circuit (PCC) Preliminary Information |
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