Cisco Systems CX-TRIP4 manual Token Ring Connection Equipment, Token Ring Cables and Connectors

Product Description

When a Token Ring interface is configured by using software commands, three LEDs for each port indicate the following:

•

•

16 Mbps—Lights if the interface is operating at 16 Mbps.

4 Mbps—Lights if the interface is operating at 4 Mbps.

•In Ring—When lit, indicates that the interface is currently active and inserted into the ring. When not lit, the interface is not active and is not inserted into a ring.

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 using the configuration command ring-speedn, 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 Each TRIP port must be configured for the same ring speed as the ring to which it is 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.

Token Ring Cables and Connectors

The Token Ring ports on the TRIP are DB-9 (PC type) receptacles that require Type 1 or Type 3 lobe cables. Type 1 lobe cables use shielded twisted pair cable and terminate at the network end with a large MAU plug. (See Figure 2.) Type 3 lobe cables use either shielded or unshielded twisted pair (UTP) cable and terminate at the network end with an RJ-11 plug. (See Figure 2.) The TRIP end of both cable types is a DB-9 plug.

Figure 2 Token Ring Type 1 Lobe Cable Connectors, DB-9 and MAU Types

TRIP end

MSAU or

MAU end

H2056

Token Ring Interface Processor (TRIP) Installation and Configuration 3