Crosstalk may refer to any of the following:
1. Electromagnetic interference received by one or more wires. Crosstalk can cause errors, noise, or prevent cables from transmitting data. Twisted-pair cable, shielded cable, and keeping cables further apart help prevent crosstalk. When crosstalk occurs it is difficult to transmit data over a network or the network card receives lots of lost packets.
2. With wireless communication, crosstalk is a signal transmission issue that causes a disruption in another circuit or channel. For example, crosstalk could cause you can hear someone else's conversation.