LinkConnect["name"] connects to a MathLink link created by another program.
LinkConnect by default operates with internet TCP links, with names of the form port@host. Ports are typically specified by numbers.
LinkConnect can connect to a port on a remote computer system.
On some computer systems, LinkConnect[ ] will bring up a port browser.
LinkConnect returns a LinkObject.
You can use LinkConnect with LinkCreate to set up peer-to-peer communication between two Mathematica processes.
LinkConnect can be used to connect to a link created by calling LinkCreate in another Mathematica process.
LinkConnect can be used to connect to an external program that has created a MathLink link by calling the appropriate MathLink library functions.
External programs built from MathLink templates using mcc and mprep can typically create MathLink links whenever they are given -linkcreate command-line arguments.
The option LinkProtocol specifies the underlying data transport protocol that LinkConnect should use.
LinkConnect internally calls a function analogous to the MLOpenArgv() function in the MathLink library.
Even though no program may yet be connected to the other end of the MathLink link, the function LinkConnect will return immediately and will not block.
See The Mathematica Book: Section 2.12.6.
See also: LinkCreate, LinkLaunch, LinkClose.