Mode Dip Switch Settings U301
S301 controls the operating mode for System B and S302 controls the operating mode for System A.
Settings are summarized as follows:
TABLE 3. Mode DIP Switch Settings for Programmed Chip P/N 90157640500 (version 1.0)
| Switch Settings |
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1 | 2 | 3 | 4 | ||
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Open | Open | Open | Open | Configuration 1, | |
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Closed | Open | Open | Open | Configuration 2, | |
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Open | Open | Open | Closed | Configuration 3, Tone Test Mode | |
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Tone Test Mode:Disables internal suppression of tones.
TABLE 4. Mode DIP Switch Settings for Programmed Chip P/N 90157640500 (version 1.1)
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| Switch Settings |
| Description | ||
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| 1 | 2 |
| 3 | 4 | |
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| Open | Open |
| Open | Open | Configuration 1, |
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| Closed | Open |
| Open | Open | Configuration 2, |
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| Open | Open |
| Open | Closed | Configuration 3, |
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| Both sides of the line can talk simultaneously. | |||||
| Only one side of the line can talk at a time and the other side must wait until the first side is | |||||
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| done talking before responding. | |
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| duplex mode. | |
Noise Suppression: |
| The unit suppresses background noise in absence of speech. Configuration 3 disables this | ||||
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| suppression. |
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