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Setting Up Forced Speed for the MDI-II Ports
Auto-sensing is the default mode. If the devices connected to the hub using the
MDI-II ports do not support Auto-sensing or if for other reasons you wish to
force the speed, set the DIP switches to one of the positions shown in Figure 2-
15. Note that forced speed can only be applied to the MDI-II ports. The DIP
switches will force either or both of the MDI-II ports into one of three modes:
❑ Auto-sensing — set the Port 1 switches and/or Port 2 switches to the
down position
❑ 100M — set the Port switches 1 and/or Port 2 switches to the up
position
❑ 10M — set Port 1 switch 1 up, 2 down; and/or Port 2 switch 3 up, 4
down
▲ Important! After changing the DIP switch settings, the
AC power to the unit must be cycled.
▲ Important! Ports 1 and 8 are individually shared with the
MDI-II ports. Therefore, when an MDI-II port is in use, its
nearest port (1 or 8) will be disabled.
Figure 2-15 MDI-II DIP Switch Settings
Connecting Ethernet and Fast Ethernet Hubs
If your transmission speed is 10Mbps, connect 10Mbps devices using UTP
Category 3 cables. This enables sending/receiving to other 10Mbps devices.
The FH216 and FH216B include a Fast Ethernet MII connector on the rear
panel. You can connect a Fast Ethernet MII transceiver to this port. It is fixed at
100Mbps and half-duplex.
1 2 3 4
Port 1 Port 8
MDI-II Switch
Port 1 Port 8
sensing
100M
10M
Auto-
1 2
3 4