Communication Between 9Xtend and Xbee Module

Is it possible to communicate between 9Xtend OEM module and the Xbee oem module?
if Yes ? How.
Also can we use API mode to communicate between Xbee and 9Xtend Modules.

The two products can only communicate with each other via the UART. That is connect the UART of the Xtend to the UART of the XBee module with the proper level shifting. Then any data that is received over one network can be transmitted over the other. Not that you will also need to have both radios in transparent mode for that to work.