Under the situation of mobile traffc explosion, the air interface of mobile services is rapidly improved, and new ones are being provided in new radio frequency bands. Also in order to effectively use frequency or network resources and avoid their bottleneck, the use of femto-cell or pico-cell architectures has been started. Backhaul networks accommodating a huge number of these pico- and femto-cell stations become more important issue. Broadband fixed access networks like FTTH systems will play an important roll as an entrance network for broadband wireless access. Radio on Fiber (RoF) technologies are able to transparently transmit various types of radio services, and its operation as entrance networks realizes an effective universal platform for newly coming air interfaces. RoF-DAS over WDM-PON using bandpass-sampling and optical TDM techniques has been proposed as a universal entrance network for broadband wireless access. This paper introduces its proposed architecture and reports the latest results of experimental and theoretical investigation of the transmission performance.