Serial Connections

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This article documents the physical serial ports on each machine and the connections between them. These connections are used for console access using Conserver.

MC 3015

Local machine      | Local TTY  | Remote machine      | Remote TTY | Baud rate
corn-syrup           ttyS1 LOM <- corn-syrup-ipmi       -                57600
mirror               ttyS1 LOM <- sodium-benzoate-ipmi  -                57600
taurine              ttyS1 LOM <- taurine-ilo           -               115200
glomag               ttyS0 LOM <- glomag-ipmi           -               115200
goto80               ttyS0     <- corn-syrup            N/A             115200
goto80               ttyS1     <- corn-syrup            N/A             115200
goto80               power     <- corn-syrup            N/A             115200
potassium-citrate    ttyS0     <- corn-syrup:ttyUSB2    hub3            115200
aspartame            ttyS0     <- corn-syrup:ttyUSB4    hub5            115200    
electrons            -         <- corn-syrup            hub8              9600

The "hubN" ports are on the 8-port serial hub. To access, look in /dev/csc, or just use ttyUSB[N-1] directly.

Machine Ports

Most machines either have no serial ports, or one DE-9 serial port. Details of other configurations are listed here. We do not have any modems (DCE), so all connections should be crossed (i.e., use null modem cables or compatible).


taurine has a virtual serial port that can be accessed via telnet or SSH

ttyS0 physical DE-9
ttyS1 virtual


ascorbic-acid has two Sun 8P8C serial ports stacked vertically, with the first port on top. The first port may be used to access LOM, and probably has to be set to 9600 baud.

A (ttyS0, LOM)
B (ttyS1)

These ports should be connected to another system's DE-9 using a DE-9<->8P8C modular adapter and an Almost Rollover or standard rollover.


potassium-citrate has two DE-9 serial ports side by side, with the second port on the left

101102 (ttyS1) 101101 (ttyS0)


sodium-citrate has two DE-9 serial ports side by side, with the second port on the left

ttyS1 ttyS0


dumbterm has one DB-25 serial port. It is currently connected to a black nonstandard DB-25<->8P8C adapter, to a special twisted pair cable, to a nonstandard 8P8C<->DE-9 adapter. All of these pieces are labeled "dumbterm". The dumbterm cable is not symmetric; the end labeled "DE-9" must be plugged into the DE-9 adapter.