Documentation/networking/arcnet-hardware.rst

726 The jumpers labeled EXT1 and EXT2 are used to determine the timeout
955 The two jumpers JP2 (1-4) are used to determine the timeout parameters.
1069   JP3: Jumpers for response timeout
1519 The jumpers labeled EXT1 and EXT2 are used to determine the timeout
1697 The jumpers labeled JP1 and JP2 are used to determine the timeout
1948 I know nothing about these. I just guess that J16&J17 are timeout
2095 The switches 6-7 of the switch block SW3 are used to determine the timeout
2242 The jumpers J3 are used to set the timeout parameters. These two
2635 The two jumpers labeled ET1 and ET2 are used to determine the timeout
2637 must be set to the same timeout values.
2989 The jumpers 6-7 of the jumper block SW3 are used to determine the timeout
3055 are used to determine the timeout parameters. These two dip switches