4.7 System Restrictions

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The following system restrictions should be noted regarding voice record and playback: Only one function can drive the output to the telephone line (a port's MVIP inband output stream); therefore, the following functions are mutually exclusive: - Voice Recording (due to sync-beep prompt) - Voice Playback - Tone Generation - FSK Sending The following functions are mutually exclusive due to shared resources on the AG board: - Voice Recording - Voice Playback If the DTMF detector is disabled, the voice functions cannot terminate when digits are entered. The following functions are typically configured to share the same group of task processors (physical DSP): - Call Progress - Voice Record - Voice Playback - Tone Generation - MF Detection For the typical configuration, DSP capacity is allotted under the assumption that every port is running no more than one of these functions at any given time. There is nothing preventing the application from concurrently executing some combinations of these functions on an individual port. If, however, multiple ports concurrently execute a combination of these functions, the DSP capacity will most likely be exhausted.

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