Agilent Technologies J3972A - Manual (Page 75)

Installation
Connecting the Probe
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Do not attach cables to both the Token-Ring DB-9 and RJ-45 connectors
simultaneously. This causes the probe to malfunction, and can disrupt your
network. You must use only one network connector at a time for correct probe
operation.
CAUTION The Token-Ring interface is not compatible with Token-Ring expansion modules
(Local Ringhub from Madge and other vendors, for example) which require
power from the Token-Ring interface. The Token-Ring interface must be
connected directly to the MsAU.
Token-Ring networks typically use Type 3 (Unshielded Twisted Pair (UTP)) cable
or Type 1 (Shielded Twisted Pair (STP)) cable. Networks using UTP cable
typically use the RJ-45 type connectors and networks using STP cable typically
use Token-Ring Data Connectors or DB-9 type connectors.
If your network uses RJ-45 connectors, you will need the standard cable with
RJ-45 connectors on both ends to connect the probe to the ring. Connect one end
of this cable to any open port of a Media Station Access Unit (MsAU) and connect
the other end to the RJ-45 connector on the probe. Figure 3-6 shows the Token-
Ring interface connected to a Type 3 MsAU.
Figure 3-6: Connecting the Probe using RJ-45 Connectors