Can someone checkout the link let me know how the pins should be connected for both transmitter and receiver? I have read the datasheet and couldn't figure out whether to connect pin2 (RSSI), pin 16 (CTS), pin 15 (RTS), pin 11 (Rx), pin 10 (Tx) and pin 9 (PD).

Datasheet (http://www.rfsolutions.co.uk/acatalog/DSSMARTALPHA-5.pdf).

Thanks alot for anyone who helps.

 

RTS and CTS are used for hardware flow control, so you should connect them to the interfacing device. If you don´t know what that is, read here.

PD is described at page 3, did you even read the datasheet?
Pin 2 is not RSSI like you posted but RFRx. Description is on the same page as well.