3Com Corporation EtherDisk Diskette for the EtherLink II Adapters Physical Transmission Options The EtherLink II TP adapter has six options that control data transmission on the physical medium. These options are set by moving jumpers on the adapter. 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 detailed information, refer to the EtherLink II TP Adapter Guide. NOTE: This file applies only to the EtherLink II TP adapter. For information on the EtherLink II/16 TP Adapter, please refer to the EtherLink II/16 TP Adapter Guide. Wire Impedance -------------- Set the WIRE IMPEDANCE jumpers to match the characteristic impedance of your cable. Use a standard test device to verify the characteristic impedance of your cable from the wiring closet to the station. 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 v3.4a)