External System communication via RFC

Hi Experts
In my landscape, sending system want to use an RFC connection to the PI via SAP java connector. In turn PI should call the RFC in the SAP System and execute the RFC and return the results.
note ; Sending system is Java based system
Is it possible to connect to PI from external system via java connector ? if so what configuration has to be done in the PI and external system.
when i checked the sender communication config , its asking for application server gateway and service.Is these needed to be configured in SAP PI or external system.
Please provide your inputs
Thanks in advance

if you are not using Java connector then you must use Java proxies.
Refer to the following link for more details-
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/7d4db211-0d01-0010-1e8e-9b07fc2113ab?quicklink=index&overridelayout=true
Edited by: vishal kharat on Aug 3, 2011 6:42 PM

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