Token Ring Connection Equipment - Cisco 7000 Series Hardware Installation And Maintenance Manual

Preparing Network Connections
Figure 2-16
Jackscrew
The MII receptacle uses 2-56 screw-type locks, called jackscrews (shown in Figure 2-16), to secure
the cable or transceiver to the MII port. MII cables and transceivers have knurled thumbscrews
(screws you can tighten with your fingers) that you fasten to the jackscrews on the FEIP MII
connector. Use the jackscrews to provide strain relief for your MII cable.

Token Ring Connection Equipment

You will need an 802.5 MAU or a multistation access unit (MSAU) to provide the interface between
the TRIP Token Ring interfaces and the external ring, and a Token Ring lobe cable between each
TRIP port and the MAU or MSAU. Lobe cables connect each Token Ring station (TRIP port) to the
MAU or MSAU, and patch cables can connect adjacent MSAUs to form one large ring.
TRIP ports operate at either 4 or 16 Mbps. The default speed for all TRIP ports is 4 Mbps, which
you can change to 16 Mbps on any port with the configuration command ring-speed n, where n is
the speed (4 or 16) in Mbps. The speed of each Token Ring port must match the speed of the ring to
which it is connected. Before you enable the Token Ring interfaces, ensure that each is set for the
correct speed, or it can bring down the ring.
Caution
connected, either 4 or 16 Mbps. If the port is set for a different speed, it will cause the ring to beacon,
which effectively brings the ring down and makes it inoperable.
2-28 Cisco 7010 Hardware Installation and Maintenance
MII Connection—Female
Pin 21
Pin 1
Each TRIP port must be configured for the same ring speed as the ring to which it is