Compaq AlphaServer ES40 - Jumpers on PCI Board; PCI Board Jumpers

B-8 Compaq AlphaServer ES40 Service Guide
B.4 Jumpers on PCI Board
You can set J31 on the PCI board to force DTR so that a modem will not
be disconnected if the system is power cycled. Check J13 if the system
is losing time or the operating system comes up with a very inaccurate
time.
Figure B–4 PCI Board Jumpers
SC0044
1 2 3 4 5 6 7 8 9 10
2 3
1
4