User manual

Chapter 2. Port Card Overview
18 Version 1.2 Apr 2006
Duplex:
The original specifications for Ethernet did not allow any bi-directional transmissions. The
Ethernet operated in a half duplex mode. Modern Ethernet has the ability to operate in Full duplex
mode which essentially doubles the throughput from 10Mbps to 20Mbps on 10Base-T or from
100Mbps to 200Mbps on 100Base-TX. Using this setting requires connection to equipment which
also supports Full duplex Ethernet. Setting DIP1-4 OFF will enable this Full duplex mode.
However, if Auto-negotiation is enabled (DIP1-3 OFF), then this switch's setting is ignored.
Speed:
DIP1-5 is used to set the Ethernet speed at 10Mbps (10Base-T) or 100Mbps (100Base-TX).
When set ON, the Ethernet connection will operate in the slower 10Base-T speed. When DIP1-5 is
set OFF, the Ethernet connection will operate at 100Base-TX speed. However, if Auto-negotiation
is enabled (DIP1-3 OFF), then this switch's setting is ignored.
Auto MDI:
Auto MDI is a new Ethernet feature which allows Ethernet connections between MDI
devices and/or MDI-X devices (HUBs) all using only straight thru, one-to-one, UTP connections.
When DIP1-6 is ON, this feature is enabled. When this feature is disabled (DIP1-6 OFF), the device
becomes MDI only and requires a crossover UTP cable to connect to another MDI device (such as
PCs). Straight cable connections are used for connecting to MDI-X devices such as HUBs.
DIP Switch Settings
DIP State Function
ON Enable MAC filtering 1
OFF* Disable Filtering (repeater)
ON Enable 802.3x flow control 2
OFF* Disable 802.3x flow control
ON NO Auto-negotiation 3
OFF* Auto-negotiation
ON Half Duplex
1
4
OFF* Full Duplex
1
ON 10BASE-T LAN speed
1
5
OFF* 100BASE-TX LAN speed
1
ON* Enable Auto MDIX 6
OFF MDI (1:1 to HUB)
OFF OFF
Memory configuration #1
ON OFF
Memory configuration #2*
OFF ON
Memory configuration #3
7 | 8
ON ON
Reserved
Table 2-6 DIP switch settings
* factory default settings
1
no effect when sw3 is off (auto-negotiation is on).
LED Indicators
Designation Indication
Full (yellow) ON=Full Duplex
Link (green) ON=LAN Link
Error (red) ON=LAN Error
100M (yellow) ON=Fast Ethernet
Receive (yellow) ON=LAN Rx data
Transmit(yellow) ON=LAN Tx data
Table 2-7 LED indicators
Memory configuration detail
#1 LAN to WAN 308 packets, WAN to LAN 32 packets
#2 LAN to WAN 170 packets, WAN to LAN 170 packets
#3 LAN to WAN 32 packets, WAN to LAN 308 packets
MDI
1. Tx +
2. Tx -
3. Rx +
6. Rx -
Table 2-8 ET100 pin allocation