A network communication system for a vehicle includes a communication bus, a first communication device, and a plurality of second communication devices which are connected to one another via the communication bus. The first communication device includes a bias voltage source for generating a constant bias voltage on the communication bus, the first communication device includes a current measurement apparatus for capturing the current on the communication bus, the network communication system includes a terminating resistor which is arranged in parallel with the plurality of second communication devices, the first communication device includes a first modulation apparatus for modulating a current set by the bias voltage and the terminating resistor on the communication bus, each second communication device includes a second voltage measurement apparatus for capturing a voltage at the terminating resistor and a second modulation apparatus for modulating the current set by the bias voltage and the terminating resistor.