Cisco Systems Cisco 2800 Ethernet Connections, Serial Connections

Port and Cable Information for Cisco2800 Series Routers

OL-5785-01

Preparing to Connect to a Network

Ethernet Connections

The IEEE has established Ethernet as standard IEEE 802.3. Cisco 2800 series routers support the

following Ethernet implementations:

•1000BASE-T—1000 Mbps full-duplex transmission over a Category5 or better unshielded

twisted-pair (UTP) cable. Supports the Ethernet maximum length of 328feet (100 meters).

Note The Cisco 2801 and Cisco 2811 routers do not support the 1000BASE-T Ethernet

implementation.

•100BASE-T—100 Mbps full-duplex transmission over a Category5 or better unshielded

twisted-pair (UTP) cable. Supports the Ethernet maximum length of 328feet (100 meters).

•10BASE-T—10 Mbps full-duplex transmission over a Category 5 or better unshielded twisted-pair

(UTP) cable. Supports the Ethernet maximum length of 328feet (100 meters).

Refer to the Cisco Modular Access Router Cable Specifications online document for information about

Ethernet cables, connectors, and pinouts.

Serial Connections

Serial connections are provided by WAN interface cards and network modules. For more information on

WAN interface cards, refer to the Cisco Interface Cards Installation Guide. For more information on

network modules, refer to the CiscoNetwor k Modules Hardware Installation Guide. These documents

are accessible online at Cisco.com.

Before you connect a 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

•Type of connector, male or female, required to connect to the device

•Signaling standard required by the device

The serial ports on the asynchronous/synchronous serial network modules and the serial WAN interface

card use DB-60 connectors. Serial ports can be configured as DTE or DCE, depending on the serial cable

used.

A device that communicates over a synchronous serial interface is either a DTE or DCE 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.) Table 1 lists typical DTE and DCE devices.