Wiring for Fast Ethernet
What are the specifications for Fast Ethernet wiring?
10Base-T Connections for Fast Ethernet
Do your Fast Ethernet Cards support 10base-T connections?
Shield vs Unshielded Pair Cabling
Can I run your Fast Ethernet cards with shielded twisted pair cables?
What is the “ct100txcfg” program used for?
Changing MAC (Ethernet) Address
How can I change the MAC (Ethernet) address of the network card?
100base-TX Fast Ethernet requires Category 5 Unshielded Twisted Pair cable, which is commonly known as "Cat. 5 UTP".
Yes. Simply by plugging in the appropriate live network cable the card will detect and configure itself to the appropriate network type.
may work with our cards in your system but there is no guarantee that it will
work correctly. In addition to offering more driver command line options to
control the link characteristics and better support for our fiber-based Fast
Ethernet Cards, our driver is “tuned and tweaked” to ensure that the following
features work correctly:
1. Full duplex communication.
2. Auto-negotiation and/or auto-sensing of link speed and duplex mode.
3. Operation of the lights on the cards to reflect the current link status.
This is the result of some checks that Net.ct100tx does to make sure that it is only being run against a CorNet Fast Ethernet Card. If you have a CorNet Fast Ethernet card and still get this message, it is likely caused by an outdated version of Net.ct100tx. Please check with Corman Technologies Inc. for a more recent driver.
No. Our cards are only
rated for use on UTP (Unshielded Twisted Pair) cabling.
For those who want the further details: Shielding on a twisted pair increases the capacitance of the cable. This increases the current requirements for circuits driving high frequency signals onto such a pair. Our circuits are not designed with the higher current ratings. This means that, in practical terms, Shielded Cable may work, especially if the run is short, but our cards are intended for such use and you do so at your own risk (either of not working or of damaging the card).
This is a bug that is in a few of the older versions of our driver (Net.ct100tx). To avoid receiving this message, visit our support page on the web site to download the latest driver. (You may see 0Mb/s – this indicates that the driver has not successfully negotiated a link speed.)
We do not currently have a driver for QNX 6. We are planning to supply one in the future. For the moment, you can use the devn-tulip.so driver, but you may have some minor glitches. When we release our driver, it will correct these glitches.
This program is intended
to configure the card for use with our Boot ROM chips. Note that the card is
configured, not the Boot ROM itself. Since this is the case, the card can be
configured without the Boot ROM installed.
However, it will have no effect on the operation of the card until a Boot ROM chip is installed.
For those who want more technical details: The card has a small non-volatile memory chip (EEPROM). This EEPROM holds configuration information. The ct100txcfg program modifies the EEPROM contents by adding Boot ROM parameters. The Boot ROM reads the EEPROM to pick up the boot parameters.
The speed and duplex mode that the driver runs at is entirely independent of the Boot ROM settings. The driver will select a new speed and duplex mode based on the hardware installed and the command line parameters. This means that you could, for example, boot using 10bT Half Duplex and then run the driver using 100TX Full Duplex if your hardware supports it.
Every Ethernet and Fast Ethernet card is assigned a unique MAC address by the manufacturer. You should never attempt to change the physical address of an Ethernet card because it could conflict with the MAC address of another Ethernet card. Having said that, it is possible to run the driver as if the card had a different MAC address. Simply use the –m command line parameter when starting the driver and give it the address that you wish to use.