Chapter 2
2-10
Interconnecting Hubs via the BNC Port
The BNC port is typically used to interconnect hubs on a thin Ethernet backbone.
The backbone cable must be properly terminated, and the network configuration
must not exceed maximum distance length or device count guidelines as given in
the 802.3 10Base2 specifications. See Table 3-1, “IEEE 802.3 Network
Specifications,” for guidelines. See Appendix C, “Pinouts and Cable
Specifications,” for details on cable construction.
To interconnect hubs on a thin Ethernet backbone:
•
Connect the AsantéHub BNC connector to a T-connector on a
properly terminated thin cable backbone, as shown in the
following figure.
RJ21 10 BASE-T PORTS
IN or OUT
AU
I
PARTITION
TRAFFIC
RS232
RS485
1 2
THRO UG H
AMS LINK
UP=PC
DO W N=TERM INAL
END
3-IN-1
UPLINK
BNC
Spare Fuse in Fuse Holder
2A/250V Slow Blow Fuse
Replace Only With Fuse of Same Rating
RJ21 10 BASE-T PORTS
IN or OUT
AU
I
PARTITION
TRAFFIC
RS232
RS485
1 2
THRO UG H
AMS LINK
UP=PC
DO W N=TERM INAL
END
3-IN-1
UPLINK
BNC
Spare Fuse in Fuse Holder
2A/250V Slow Blow Fuse
Replace Only With Fuse of Same Rating
Terminator
RJ21 10 BASE-T PORTS
IN or OUT
AU
I
PARTITION
TRAFFIC
RS232
RS485
1 2
THRO UG H
AMS LINK
UP=PC
DO W N=TERM INAL
END
3-IN-1
UPLINK
BNC
Spare Fuse in Fuse Holder
2A/250V Slow Blow Fuse
Replace Only With Fuse of Same Rating
Terminator
Figure 2-4. Interconnecting Hubs on Thin Ethernet Backbone
!
Note: The Terminator may be used either at one end of a T-connector,
or at the end of a cable.