transfering data between two different systems through dedicated port

Hi!

We are developing our system in java. But we need to communicate an existing Tandem COBOL System through a dedicated port to get some information. The user has already developed an interface to listen the request and send the response. What sort of interface we need to develop for requesting and receiving data? Anyone here to help me?

[353 byte] By [shambua] at [2007-10-3 2:54:19]