Allied Telesis AT-MR820TR - Manual (Page 26)

Product Description
4
jabber lock-up automatically prevents transmitted data from reaching
the repeater if the transmitted data time exceeds a specified duration
(usually 5 ms).
Backbone Network Port
There are two user-selectable network media options which can be
used to connect to a backbone network: 10Base2 and 10Base5.
These network ports are located on the back panel. See Figure 3.
Figure 3: Network Media Options
These media alternatives are:
❑ 10Base2 (Bayonet Nut Couple [BNC])
— 10Base2 requires a thin coaxial cable, RG58U, which is a 10
MHz baseband cable that uses BNC-series connectors. The
cable must be terminated at both ends with 50
Ω
terminators and grounded at one end. Maximum segment
length is 185 meters (606 ft.). Internal termination is
provided via the BNC Terminator Switch. See Chapter 4
“BNC Terminator Switch” for details concerning this
switch.
MRx20TR(STP/UTP)_BookA Page 4 Thursday, April 3, 1997 5:24 PM