DSP Pattern Detector
For TDM tunneling applications, you can use the DSP pattern detector feature to initiate the echo canceller at call start. The device can be configured to support detection of a specific one-byte idle data pattern transmitted over digital E1/T1 timeslots. The device can be configured to detect up to four different one-byte data patterns. When the defined idle data pattern is detected, the channel resets its echo canceller.
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To configure DSP pattern detector: |
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1.
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On the DSP Settings page (Setup menu > Signaling & Media tab > Media folder > DSP Settings), do the following: |
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a.
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From the 'IPMedia Detectors' drop-down list [EnableDSPIPMDetectors], select Enable. |
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b.
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From the 'Enable Pattern Detector' drop-down list [EnablePatternDetector], select Enable. |
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2.
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Configure the number (e.g., 5) of consecutive patterns to trigger the pattern detection event, using the ini file parameter [PDThreshold]. |
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3.
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Configure the patterns that can be detected by the Pattern Detector, using the ini file parameter [PDPattern]. For example: |
PDPattern = 84, 85, 212, 213 ; for idle patterns 54, 55, D4 and D5