Moxa EDS-316-T [14/16] Auto negotiation and speed sensing
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Moxa EDS-316-T [14/16] Auto negotiation and speed sensing

Moxa EDS-316-MM-ST-T [14/16] Auto negotiation and speed sensing
- 14 -
Packets that are used in maintaining the operation of the network (such
as the occasional multi-cast packet) are forwarded to all ports.
EDS-316 operates in the store-and-forward switching mode, which
eliminates bad packets and enables peak performance to be achieved
when there is heavy traffic on the network.
Switching and Address Learning
Moxa EDS-316 has an address table that can hold up to 4K node
addresses, which makes it suitable for use with large networks. The
address tables are self-learning, so that as nodes are added or removed,
or moved from one segment to another, EDS-316 automatically keeps up
with new node locations. An address-aging algorithm causes the
least-used addresses to be deleted in favor of newer, more frequently
used addresses. To reset the address buffer, power down the unit and
then power it back up.
Auto-Negotiation and Speed Sensing
All of EDS-316’s RJ45 Ethernet ports independently support
auto-negotiation for speeds 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. EDS-316 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 similarly advertise. 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 an EDS-316 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
Technology
Standards
IEEE802.3, 802.3u, 802.3x
Forward and Filtering
Rate
148810 pps (100M), 14881 pps (10M)
Packet Buffer Memory
1.25 MB
Processing Type
Store and Forward, with IEEE802.3x full duplex,
back pressure flow control
Address Table Size
4K uni-cast addresses
Interface
RJ45 Ports
10/100BaseT(X) auto negotiation speed, F/H
duplex mode, and auto MDI/MDI-X connection
Fiber Ports
100BaseFX ports (SC/ST connector)
LED Indicators
Power, Fault, 10/100M
DIP Switch
Port break alarm mask
Alarm Contact
One relay output with current carrying capacity of
1A @ 24 VDC

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