1. The problem statement, all variables and given/known data I am currently embarking on a project where I have to build a communications system which can take in an analog voice signal, translate it into digital signal, and send it across to the receiver where the original voice gets recovered and it can be played back using a speaker. In the project, I have to use a twisted wire (I think it is just 2 straight wires twisted together) to link the transmitter and receiver ends of the system together. However, does the use of a twisted wire enhance the quality at which the data is transmitted? (i.e. through reducing interference or 2. Relevant equations 3. The attempt at a solution We know that the benefits of having a twisted wire is such that electromagnetic interference is reduced by reducing crosstalk between the 2 pairs of wires. However, I am a bit confused here - does interference occur only when I transmit data via analog mode? This is because I am transmitting data digitally here via PCM, thus I was thinking, since digital systems are more resistant to noise, using a twisted wire for data should not pose a huge problem. I also have to mention the possible problems when I use a twisted wire to link both the transmitter and receiver end together. Right now, I can only think of resistance affecting the quality of the data. May I know, if anyone has good online sources or ideas, on where I can find information to brainstorm about the possible problems I will run into when I use a twisted wire as my data link for the communication system? Thank you.