is the ADSL data signal. Two frequency bandwidths are used in ADSL.
Voice - 300-3400 Hz.
DSL - 80 KHz-1.1 MHz (The combining of several frequency bandwidths into one larger bandwidth is called Frequency Division Multiplexing. This is how DSL works. A frequency range (bandwidth) of 80,000 Hz to 1,100,000 Hz is the carrier frequency. This larger bandwidth is broken down into 256 specific bandwidths, and each one can carry up to 15 bits of data).
The splitter is a simple band pass filter that will block the DSL signal to the phone. If this filter is defective you will hear the data frequencies.
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I recently connected to a broadband PPPoE internet network. The system of connection utilizes something called ADSL Splitter. It splits the main phone line into a modem line and a phone line. The problem is that in some rooms although the phone works there is some sort of hissing, clicking, and high-pitched noise.
I've talked to a technician about that and he told me it's because of a defective splitter.
Do you think that this would be the case? or do you think there's something wrong in the circuit of the main phone line itself?
I'd appreciate your opinions.
Thanks.

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