The ISP data uses the high-frequency band -LRB- NUMBER@1 kHz and above -RRB- whereas the voice utilizes the lower-frequency band -LRB- NUMBER@2 kHz and below -RRB- .

The ISP data is carried over the high-frequency band -LRB- NUMBER@1 kHz and above -RRB- while the voice is carried over the lower-frequency band -LRB- NUMBER@2 kHz and below -RRB- .
