They then activate the sender and receiver, which handle all other communication between the user and the foreign monitor. When the user is finished and escapes back to his monitor, it is up to the sender to close down the links. Local user calls send-logger. If they exist and it is able to establish connection, it accepts and then immediately closes the link. Receive-logger, which is listening on 2M, accepts link.
Loggers activate appropriate handlers.
When the user is finished, sender closes down both links. This basic method of establishing a full duplex connection should be standard throughout the network. The particular way each installation handles the implementation of the sender, receiver, and the two loggers is of no consequence to the network and is highly machine dependent. However, some conventions must be established regarding communication between the sender and receiver, or their equivalents. It makes sense to require machines to make only one conversion to a standard code, than to have to make conversions to every code on the net.