The serial ports on two computers which use binary signaling are connected by a twisted pair cable. The cable has a flat frequency response up to 120KHz, with negligible group delay distortion. That is, the bandwidth of the cable is 120KHz. If the noise introduced by the cable is - 30dB with respect to the signal power, what is the resulting maximum information transfer rate?
Assume that the link is a baseband link, that is, the frequency response extends from dc to 120kHz.