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DataTalker Owner’s Manual
7 Comparing Data Blocks Transmitted with Data Blocks Retransmitted (the number of
retransmits needed to get the data through) can indicate a line problem. Comparing Data
Blocks Received with Receive Block Errors can indicate the same problem from the other
end of the link. Numbers that you might encounter could be 10,000 data blocks transmitted
(or received) compared to 500 or 1000 retransmits (or receive block errors).
Link Alarms tells you simply that there is some sort of problem on the link. You will find that
the Link Alarms numbers will correspond to the Data Blocks Retransmitted and Receive
Block Errors numbers. Specifically, a Link Alarm means that it has been 10 seconds since
the DataTalker has received an acknowledgment. Normally, three acknowledgments will be
received during a 10-second period.
The remote down entry means that the DataTalker has sent data 30 times and could not get
it through (the link has been broken).
The other entries do not apply to link problems.
8 Enter M and press ENTER to return to the Main Menu.
9 Disconnect the terminal or PC from the command port and place DIP switch position 3 in the
up (OPEN) position to change the command/data port over to a data channel.