3Com Corporation
EtherDisk Diskette for the EtherLink/MC Adapters
Physical Transmission Options
The EtherLink/MC 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 to help you set these options so that
the EtherLink/MC TP adapter will work correctly with both 10BASE-T and
non-10BASE-T hubs. For more detailed information, refer to the
EtherLink/MC TP Adapter Guide.
Setting Jumpers on the EtherLink/MC TP Adapter
----------------------------------------------
If you need to change the jumpers on the EtherLink/MC TP adapter to
accommodate different hubs or wiring:
1. Set the IMPEDANCE jumpers to match the characteristic impedance of
your twisted-pair cable.
a. Use a test device to verify the characteristic impedance of your
cable from the wiring closet to the station.
b. Choose the impedance jumper setting closest to that
characteristic impedance.
Default Setting: 100 ohms
Alternative Settings: 75 ohms, 150 ohms
2. To set the RECEIVE THRESHOLD, LINK BEAT, EQUALIZATION, TRANSMIT LEVEL,
and DC SIGNAL jumpers, refer to Table 1.
Table 1. Jumper Settings for 10BASE-T and Non-10BASE-T Hubs
--------------------------------------------------
| | | HP StarLAN 10, |
| | SynOptics | AT&T StarLAN 10, |
| 10BASE-T | LattisNet | DAVID Systems | BULL Hub 10
| (default) | (non-10BASE-T) | (non-10BASE-T) | (non-10BASE-T)
-------------+-----------+----------------+------------------+---------------
Link Beat | 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)
Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.