TestOut LabSim A+ Certification Practice Exam

Where should DSL filters be installed when configuring an ADSL installation?

1. On the modem connection

2. On connections leading to an analog phone

3. On the main router

4. On the power outlet

The correct answer is: On connections leading to an analog phone

The installation of DSL filters is essential in an ADSL configuration to ensure optimal performance of both the internet connection and any analog phone devices. DSL filters are specifically designed to separate the high-frequency signals used for data transmission from the low-frequency signals used by analog telephones. Installing the filters on the connections leading to analog phones is important because it prevents interference. Without DSL filters, the signals from the ADSL service can disrupt phone calls, leading to noise, dropped calls, or other service issues. The filter allows both services—ADSL and voice calls—to coexist on the same line without impacting each other. On the other hand, installing filters on the modem connection or the main router would not serve the intended purpose, since the modem and router are designed to handle the data signals directly. Similarly, placing filters on the power outlet does not have relevance to the DSL performance issue since filters need to be applied directly to the phone line connections to achieve the correct filtering effect.