Delta Electronics DVS-008W01-MC01 [40/40] Auto mdi mdi x connection
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Delta Electronics DVS-008W01-MC01 [40/40] Auto mdi mdi x connection

Delta Electronics DVS-008W01-MC01 [40/40] Auto mdi mdi x connection
DVS Series Industrial Ethernet Switches
4.1 Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function let users connect DVS switches’ 10/100Base-T(X) ports to any kind of
Ethernet device. You don’t need to pay attention to the type of Ethernet cable being used for the
connection. This means that you can use either a straight-forward cable or cross-over cable to
connect DVS switches to Ethernet device.
4.2 Auto-Negotiation and Speed Sensing
All of DVS switch’s RJ45 Ethernet ports could independently support auto-negotiation for speeds in
the 10BaseT and 100Base-T(X) modes, with operation according to the IEEE 802.3u standard. It
means that it could support some ports operating in 10 Mbps and the others ports operating in
100Mbps in the same time.
Auto-negotiation happens when a RJ45 cable connection is made, and then each time a LINK is
enabled, DVS switches advertises its capability for using either 10Mbps or 100Mbps 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 in a speed of either
10Mbps or 100Mbps.
4.3 Stored and Forward
DVS switches could support the packet size between 64 bytes to 1522 bytes. They could store the
traffic packets when the buffer of the receiver device in the other size of the internet line is full. DVS
switches could store the packages until the receiver device could process the new package, DVS
switches will restart to send the stored package to the receiver.
4.4 Addresses Capability and Learning
DVS switches has address learning engine to learn the source address of ingress frames. Up to 8K
MAC addresses and port number mappings can be stored in the address database. When a new
MAC address found that is not in the MAC address mapping database. DVS switches could
self-learning the message of the MAC address and place it into the MAC database. It means that
DVS switches could automatically support more internet devices in the application.
4.5 Quality of Service and VLAN Tagging
DVS switches has another feature that is different from other unmanaged switches, that is DVS
switches could support high speed and non-blocking to transfer the packets with VLAN tagging or
the 4 traffic classes QoS packet. The priority from high to low is 7 to 0. The 4 sets priorities are “7,6”,
“5,4” , “3,0”, “2,1”. The highest level priorities are 7and 6 for the application as RIP and OSPF
protocol routing updated. The priority “5,4” is for the delay-sensitive application as video and audio
application. The priority “3,0” is for the control-load
application as streaming multi-media and
business critical traffic application. The priority “2,1” is the lowest priority for the application that don’t
need any application setting. This feature could let the network application be more flexible and it
will not limit the networks setting cause of the packet types.
4.6 Broadcast Control
When some network device work abnormal, it maybe will send out to many broadcast packets and it
maybe will paralysis the Ethernet traffic. DVS-008/016W series have Broadcast control function, this
feature could limit the broadcast packet traffic under the 10% full speed packet traffic and it could
avoid the abnormal broadcast packet to paralysis the Ethernet traffic and the user has more stable
Ethernet environment.
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