What happens at the receiver output of ST3485 when A-B is 127mV?

[GModu.1]

I have a circuit with ST3485 supplied at 3.3V. There's a 1.5k pull-up on A, 1.5k pull-down on B and 120R between A and B. So when the transmitter is disabled, A-B=120*(3.3/3120)=127mV. I'm wondering what happens at the receiver and if its output is stable or not.