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VIP Port Adapter Functions
4R Port Adapter Receptacles, Cables, and Pinouts
A network interface cable provides the connection between the 9-pin Token Ring receptacles on the
4R port adapter and a media access unit (MAU). The 9-pin connector at the 4R port adapter end, and
the MAU connector at the network end, are described in the section "Token Ring Connection
Equipment" on page 32.
4R Port Adapter Receptacles and Cables
The Token Ring ports on the 4R port adapter are DB-9 (PC type) receptacles that require Type 1 or
Type 3 lobe cables. Token Ring interface cables are not available from Cisco Systems, but are
commercially available through outside cable vendors. Type 1 lobe cables use shielded twisted-pair
(STP) cable and terminate at the network end with a large MAU plug. (See Figure 17.) The 4R port
adapter end of the cable is a DB-9 plug.
Figure 17
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 18.) The 4R port adapter end of the cable is a DB-9
plug.
Figure 18
34 VIP-4R/4T Installation and Configuration
Token Ring Type 1 Lobe Cable Connectors, DB-9 and MAU Types
Token Ring Type 3 Lobe Cable Connectors, DB-9 and RJ-11 Types
4R port adapter end
MAU end
4R port adapter end
MSAU or
MAU end
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