HDC-UHD Series User Guide
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6.4 Connecting LAN cable
Pin assignment of the LAN connector is as follows.
Auto MDI/MDI-X that detecting and switching straight cable/cross cable is supported.
Light in green while link is established.
Blinks in green while data is being
sent/received.
Light in orange if the send/receive
rate is 100 Mbps.
Goes off if it is 10 Mbps.
8
1
LAN connector
8-pin RJ-45 connector
(Rear panel)
RX+
N.C.
TX+
Pin#
1
3
2
4
6
5
7
8
Signal Name
TX-
N.C.
RX-
N.C.
N.C.
(Transmitted Data +)
(Transmitted Data -)
(Received Data +)
(Not Connected)*
(Received Data -)
(Not Connected)*
(Not Connected)*
(Not Connected)*
MDI
TX+
N.C.
RX+
RX-
N.C.
TX-
N.C.
N.C.
(Received Data +)
(Received Data -)
(Transmitted Data +)
(Not Connected)*
(Transmitted Data -)
(Not Connected)*
(Not Connected)*
(Not Connected)*
MDI-X
*Not used
[Fig. 6.4] LAN connector
Make sure not to form a loop by the HDC when connecting a LAN cable to the HDC.
The HDC constantly send broadcast packet in order to notify status.
If adding the LAN cable to the existing network, avoid problems, such as broadcast storm caused by
broadcast traffic.
Broadcast storm: This problem occurs when a network system is overwhelmed by continuous broadcast
traffic or the like.
