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| Model 3540 PESQ Option |
Connection to a PSTN or VoIP Network though a telephone: |
Model 3540 Direct Connection to a PSTN Network: |
Model 3540 Connection to a PSTN Telephone:
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| Model 3540 PESQ Option |
|
Connection to a PSTN or VoIP Network though a telephone: |
|
Model 3540 Direct Connection to a PSTN Network: |
|
Model 3540 Connection to a PSTN Telephone:
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