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- 3Com Corporation
- EtherDisk Diskette for the EtherLink II Family
- Physical Transmission Options
-
-
-
- The EtherLink II TP adapter contains six options that control data
- transmission on the physical medium. These options are set by moving
- jumpers on the adapter. This applies only to the EtherLink II TP adapter.
- For information on the EtherLink II/16 TP Adapter, please refer the
- EtherLink II/16 TP Adapter Guide.
-
- This file contains information that will help you set these options so that
- the EtherLink II TP adapter will work correctly with both 10BASE-T and
- non-10BASE-T hubs. For more information, refer to the EtherLink II TP
- Adapter Guide.
-
-
- Wire Impedance
- --------------
-
- Set the WIRE IMPEDANCE jumpers to match the characteristic impedance of your
- cable.
-
- Verify the characteristic impedance of your cable from the wiring closet to
- the station by using a test device. Use the 100 ohms setting if you are
- connecting to standard 10BASE-T wiring.
-
- The available settings are:
-
- Setting Impedance Range
- ------- ---------------
- 75 70-85 ohms
- 100 85-115 ohms
- 150 115-160 ohms
-
-
- Other Options
- -------------
-
- The other jumpers should be set according to the following table:
-
- HP StarLAN 10,
- SynOptics AT&T STARLAN 10,
- 10BASE-T LattisNet DAVID Systems BULL Hub 10
- Jumper (default) (non-10BASE-T) (non-10BASE-T) (non-10BASE-T)
- -------- --------- -------------- -------------- --------------
-
- LINK PULSE ON OFF OFF OFF
-
- EQUALIZATION TX RX TX RX
-
- DC SIGNAL OFF ON OFF OFF
-
- TRANSMIT
- LEVEL NORM LOW NORM LOW
-
- RECEIVE
- THRESHOLD NORM LOW NORM LOW
-
-
-
-
-
- (%VER Physical Transmission Options v2.0c)