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Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function allows users to connect the IMC-101’s
10/100BaseTX ports to any kind of Ethernet device, without paying
attention to the type of Ethernet cable being used for the connection. This
means that you can use either a straight-through cable or cross-over
cable to connect the IMC-101 to Ethernet devices.
Dual Speed Functionality and Switching
The IMC-101’s 10/100 Mbps RJ45 switched port auto negotiates with the
connected device for the fastest data transmission rate supported by both
devices. All models of the IMC-101 are plug-and-play devices, so that
software configuration is not required at installation, or during
maintenance. The half/full duplex mode for the RJ45 switched ports is
user dependent and changes (by auto-negotiation) to full or half duplex,
depending on which transmission speed is supported by the attached
device.
Auto-Negotiation and Speed Sensing
All of the IMC-101’s RJ45 Ethernet ports independently support
auto-negotiation for transmission speed in the 10BaseT and 100BaseTX
modes, with operation according to the IEEE 802.3u standard. This
means that some nodes could be operating at 10 Mbps, while at the same
time, other nodes are operating at 100 Mbps.
Auto-negotiation takes place when an RJ45 cable connection is made, and
then each time a LINK is enabled. The IMC-101 advertises its capability
for using either 10 Mbps or 100 Mbps transmission speeds, with the
device at the other end of the cable expected to advertise similarly.
Depending on what type of device is connected, this will result in
agreement to operate at a speed of either 10 Mbps or 100 Mbps.
If the IMC-101’s RJ45 Ethernet port is connected to a non-negotiating
device, it will default to 10 Mbps speed and half-duplex mode, as required
by the IEEE 802.3u standard.
Specifications
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