Cisco 7120 Series User Manual page 5

Chapter 1 Overview
Caution To ensure the proper flow of cooling air across the internal components, make sure a blank port adapter
is installed in an unoccupied port adapter slot. The product number for a blank port adapter is
MAS-7100-PABLANK=.
The modular port adapter slides into the chassis slot and connects directly to the router; there are no
internal cables to connect.
The port adapter, service module, fixed WAN interfaces, and fixed LAN interfaces connect to two
Peripheral Component Interconnect (PCI) buses on the router's backplane that provide a path to packet
I/O memory and the system processor. For more information, see the
Interconnect Buses" section on page
Cisco 7100 series VPN routers can be installed on a tabletop or in an equipment rack. Rubber feet for
tabletop installation are included in the accessory kit that shipped with your router. A rack-mount and
cable-management kit is also standard equipment when Cisco 7100 series VPN routers are shipped from
the factory. The kit provides the hardware needed to mount the router in a standard 19- or 23-inch,
four-post or telco-type equipment rack. The kit also provides the hardware necessary to manage the
interface cables attached to the router. The product number for the rack-mount kit is ACS-7100-RMK=.
Instructions for setting the router on a tabletop, installing the router in an equipment rack, and attaching
the cable-management bracket are the same for all Cisco 7100 series VPN models and are explained in
Chapter 3, "Installing a Cisco 7100 VPN Series Router."
Cisco 7120 Series Overview
Cisco 7120 series routers include the following models:
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Cisco 7120-4T1
The Cisco 7120-4T1 provides four channel-independent, synchronous serial ports that support
full-duplex operation at T1 (1.544-Mbps) and E1 (2.048-Mbps) speeds. The Cisco 7120-4T1 provides
the following features:
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Cisco 7120-4T1—Provides four channel-independent, synchronous serial ports that support
full-duplex operation at T1 (1.544-Mbps) and E1 (2.048-Mbps) speeds.
Cisco 7120-T3—Provides one high-speed, synchronous serial port that supports full-duplex
operation at T3 (45-Mbps) speeds.
Cisco 7120-E3—Provides one high-speed, synchronous serial port that supports full-duplex
operation at E3 (34-Mbps) speeds.
Cisco 7120-AT3—Provides one high-speed, ATM port that supports full-duplex operation at T3
(45-Mbps) speeds.
Cisco 7120-AE3—Provides one high-speed, ATM port that supports full-duplex operation at E3
(34-Mbps) speeds.
Cisco 7120-SMI3—Provides one ATM port that supports full-duplex operation at OC-3c/STM1
single-mode intermediate reach (155-Mbps) speeds.
EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA-530 interface types
External (data terminal equipment [DTE] mode) or internal (data communications equipment [DCE]
mode) timing signals (except for EIA-530, which only supports external)
1-33.
Cisco 7100 Series VPN Router Installation and Configuration Guide
Cisco 7120 Series Overview
"Peripheral Component
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