Exchange/RJE Manual

INTERRUPT Command
Exchange/RJE Commands
3–28 104698 Tandem Computers Incorporated
INTERRUPT Command The INTERRUPT command requests the remote system to stop transmitting data to
the local system.
I[NTERRUPT]
Line Activity The INTERRUPT command sends an EOT in response to the first block received after
the command is entered. Subsequent blocks (if any) are acknowledged with an ACK 1
or ACK 0 (or NAK) as appropriate. The receive operation continues until stopped by
the remote system.
Considerations The INTERRUPT command requests the remote system to stop transmitting data to
the local system. The remote system may or may not stop the transmission depending
on how the remote system is programmed.
If the remote system does not stop the transmission, the receive operation continues
normally. If the remote system does stop the transmission, the data communications
line goes idle and you can begin a new operation. In either case, Exchange/RJE
displays a message when the receive operation has completed.
Generally, an INTERRUPT command is followed by a RECEIVE command with the
ALL parameter specified as shown below.
>RECEIVE JUNK, ALL
The purpose of this RECEIVE command is to accept any output that the remote system
may attempt to send. By accepting this output, you can place both the local system
and the remote system in a known state with no extraneous output waiting to be sent.
The INTERRUPT command is allowed only when a receive operation is in progress.
Entering the INTERRUPT command when a receive operation is not in progress
results in an error. To stop a send operation, use the ABORT command. See the
ABORT command earlier in this section for more information about stopping a send
operation.