Multi-Tech Systems DT101/xx, DT102/xx owner manual DataTalker Owner’s Manual

DataTalker Owner’s Manual

7Comparing 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.

8Enter M and press ENTER to return to the Main Menu.

9Disconnect 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.

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