A "loopback test of a communication interface means connecting the
interface output to the input, sending a known signal, and confirming
that the correct signal is received.

  With some kinds of interfaces, this can only successfully be done
by pugging a specially-wired "loopback connector" into the cable
socket.  However, the presence of the word "Internal" in the message
would appear to indicate that the necessary connections exist inside
the card and can be enabled by the diagnostic software.
  Note, though, that this could be a misleading message.  And the
requirement that the cable be plugged in suggests that such a
connector *may* actually be required in order to run a loopback test.
(The card may see some signals when the cable is connected that
convine it that there *might* be a loopback connector installed.)

  Do these cards have LEDs which display the link status?  Which ones
are on and which off?

David Gillett



On 9 Mar 2002, at 13:01, Max Timchenko wrote:

> Hello list,
>
>   My 2 networked PCs has stopped working. The PCs are linked with
> crossover cable. Bought a new cable, still doesn't work (but they test
> the cables with ohm-meter in store, not in a real network, so the
> second cable could be bad too).
>
>   Self-test on one of the cards, _only if either network cable is plugged
> in on both cards_, reports:
>
>   "Basic Internal Lookback // RX Failed // RX RDES0 Error //
>   RDES0=00F4970A"
>
>   The cards are CNET PCI-200. I suspect one of the cards is bad. Can
> I be sure one of the cards is bad based on this error message?
>
> Yours,
>
> +=-.
> | Max Timchenko [MaxVT]
> | [log in to unmask], [log in to unmask]
> | FAX (413)431-4014               ICQ 2386792
> |
> | Freelance website and graphics designer
> | Visit my site : http://maxwd.hypermart.net
> |
> | Editor - Graphics artist
> | NOSPIN group
> +=-.
>
>                The NOSPIN Group Promotions is now offering
>               Mandrake Linux or Red Hat Linux CD sets along
>          with our NOSPIN Power Linux CD...  at a great price!!!
>              http://freepctech.com/goodies/promotions.shtml
>
>

        The NOSPIN Group provides a monthly newsletter with great
       tips, information and ideas: NOSPIN-L, The NOSPIN Magazine
           Visit our web site to signup: http://freepctech.com