Cisco CATALYST 3920 24 PORT TOKEN RING SWITCH Guida Specifiche
Introduction to the Catalyst 3920 1-7
Token Ring Ports
The front of the Catalyst 3920 has 24 shielded RJ-45 connectors for Token Ring connections. These
ports allow HDX or FDX connections to other switches, hubs, or end nodes. They support the IBM
Cabling System via 150-ohm, shielded twisted-pair (STP) or 100- or 120-ohm unshielded-twisted
pair (UTP) via Category 3, 4, or 5 cables.
ports allow HDX or FDX connections to other switches, hubs, or end nodes. They support the IBM
Cabling System via 150-ohm, shielded twisted-pair (STP) or 100- or 120-ohm unshielded-twisted
pair (UTP) via Category 3, 4, or 5 cables.
Back of the Catalyst 3920
Figure 1-2 shows the back of the Catalyst 3920.
Figure 1-2
Back of the Catalyst 3920
Power Connector
The power connector is located on the back of the Catalyst 3920. There is no power switch.
ProStack Port
The ProStack port located on the back of the switch allows you to stack, or interconnect, switches.
This port operates in FDX mode at speeds of 140 Mbps. It switches packets at wire speeds with low
forwarding latency. When interconnected via the ProStack port, the members of the stack function
as one operational system. You can attach the ProStack port directly to the ProStack port of another
Catalyst 3920 or to a ProStack Matrix unit. For more information about stacking Catalyst switches,
refer to the “Interconnecting Catalyst 3920 Switches” chapter.
This port operates in FDX mode at speeds of 140 Mbps. It switches packets at wire speeds with low
forwarding latency. When interconnected via the ProStack port, the members of the stack function
as one operational system. You can attach the ProStack port directly to the ProStack port of another
Catalyst 3920 or to a ProStack Matrix unit. For more information about stacking Catalyst switches,
refer to the “Interconnecting Catalyst 3920 Switches” chapter.
Redundant Power System (RPS) Connector
To help protect your network against power outages, you can connect the Catalyst 3920 to the
optional Cisco 600-Watt RPS (PWR600-AC-RPS). The Cisco RPS provides power system
redundancy to external devices (such as routers, switches, or hubs). The RPS system includes two
fully redundant AC input power modules and four DC output power modules for connection to
external devices.
optional Cisco 600-Watt RPS (PWR600-AC-RPS). The Cisco RPS provides power system
redundancy to external devices (such as routers, switches, or hubs). The RPS system includes two
fully redundant AC input power modules and four DC output power modules for connection to
external devices.
10145
EIA 232
RPS Present
RPS Good
INT PS GOOD
RPS Good
INT PS GOOD
EIA 232
RPS Present
RPS Good
INT PS GOOD
RPS Good
INT PS GOOD
Power supply
Fan
Stack Port
connector
RPS connector
DB-9
console
connector
Fan