The new DisplayPort 1.2 Data Recovery Repeater, DPAX is an active repeater for DisplayPort video signal to increase video transmission of a DisplayPort signal up to combined length of 18m (59ft) over Premium grade DisplayPort cable. 

3m (10ft) from the Source - 15m (49ft) to the Display at DP1.2 
5m (16ft) from the Source - 20m (65ft) to the Display at DP1.1 

DPAX complies with DisplayPort 1.2 standards, and supports Ultra High Definition (up to 4096x2160) at 60Hz with auxiliary channel, MST function. DPAX has been especially designed to work with Opticis fiber-optic DisplayPort extenders, DPFX-100, DPFX-200 and M1-5000. So it can extend transmission of DisplayPort signal even longer.