Cisco Systems OL-31454-01 Manual De Usuario
2-7
Cisco 2010 Connected Grid Router Hardware Installation Guide
OL-31454-01
Chapter 2 Preparing for Router Installation
Network Cabling Specifications
See the following document for more information about network connections and interfaces:
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Statement 1021
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Statement 1021
Ethernet Connections
The IEEE has established Ethernet as standard IEEE 802.3. The Cisco CGR 2010 router supports the
following Ethernet implementations:
following Ethernet implementations:
•
1000BASE-X—1000 Mb/s full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable (IEEE 802.3z). Supports the Ethernet maximum length of 328 feet (100
meters).
twisted-pair (UTP) cable (IEEE 802.3z). Supports the Ethernet maximum length of 328 feet (100
meters).
•
1000BASE-T—1000 Mb/s full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable (IEEE 802.3ab). Supports the Ethernet maximum length of 328 feet (100
meters).
twisted-pair (UTP) cable (IEEE 802.3ab). Supports the Ethernet maximum length of 328 feet (100
meters).
•
100BASE-TX—100 Mb/s full-duplex transmission over a Category 5 or better unshielded
twisted-pair (UTP) cable (IEEE 802.3u). Supports the Ethernet maximum length of 328 feet (100
meters).
twisted-pair (UTP) cable (IEEE 802.3u). Supports the Ethernet maximum length of 328 feet (100
meters).
See
at www.cisco.com for information about
Ethernet cables, connectors, and pinouts.
Serial Connections
Serial connections are provided by the grid router WAN interface card (GRWIC). Before you connect a
device to a serial port, you need to know the following:
device to a serial port, you need to know the following:
•
Type of device, data terminal equipment (DTE) or data communications equipment (DCE), you are
connecting to the synchronous serial interface
connecting to the synchronous serial interface
•
Type of connector, male or female, required to connect to the device
•
Signaling standard required by the device
Configuring Serial Connections
The serial ports on the asynchronous/synchronous serial network modules and the serial grid router
WAN interface card use a GRWIC-8A/S cable with a DB-25 connector. Serial ports can be configured
as DTE or DCE, depending on the serial cable used.
WAN interface card use a GRWIC-8A/S cable with a DB-25 connector. Serial ports can be configured
as DTE or DCE, depending on the serial cable used.
Serial DTE or DCE Devices
A device that communicates over a synchronous serial interface is either a DCE or DTE device. A DCE
device provides a clock signal that paces the communications between the device and the router. A DTE
device does not provide a clock signal. DTE devices usually connect to DCE devices. The documentation
that accompanied the device should indicate whether it is a DTE or DCE device. (Some devices have a
jumper to select either DTE or DCE mode.)
device provides a clock signal that paces the communications between the device and the router. A DTE
device does not provide a clock signal. DTE devices usually connect to DCE devices. The documentation
that accompanied the device should indicate whether it is a DTE or DCE device. (Some devices have a
jumper to select either DTE or DCE mode.)
lists typical DTE and DCE devices.