No Drop Cables Allowed from Thin Ethernet T-Connector to NIC (93019)
The information in this article applies to:
- Microsoft Windows for Workgroups 3.1
- Microsoft Windows for Workgroups 3.11
This article was previously published under Q93019 SUMMARY
The following configuration is not supported by 802.3 10BASE2 (Thin
Ethernet) cable:
tT ----RG58/u (Main Cable)-------------Tt
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|<---RG58/u (Drop Cable) |
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NIC NIC
Key
t = terminator
T = T-connector
NIC = network interface card
The additional drop cable depicted in the above diagram should not be
used. The T-connector should be connected directly to the network
interface card.
MORE INFORMATION
Because Thin Ethernet network interface cards are not impedance
matched, some of the signal coming off the main cable reflects off the
network interface card and back on to the main cable.
If the distance is short (less than one to two inches), the echo lands
right on top of the main signal and no distortion occurs.
If the distance is long (more than one to two inches), the time taken
for the signal to travel down the drop cable, bounce off the card, and
come back, is significant and can make the echo land on top of the
next pulse, which can result in scrambled signals.
| Modification Type: | Major | Last Reviewed: | 10/13/2003 |
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| Keywords: | KB93019 |
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