Message Channel Agent
A message channel agent (MCA) is a program that controls the
sending and receiving of messages. There is one message channel agent at each
end of a channel. One MCA takes messages from the transmission queue and puts
them on the communication link. The other MCA receives messages and delivers
them onto a queue on the remote QMGR
A message channel agent is called a caller
MCA if it initiated the
communication, otherwise it is called a responder MCA. A caller MCA may be
associated with a sender, cluster-sender, server (fully qualified), or
requester channel. A responder MCA may be associated with any type of message channel,
except a cluster sender.
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