Serial Connections; Configuring Serial Connections; Serial Dte Or Dce Devices - Cisco 2691 - VPN Bundle Router Hardware Installation Manual

Preparing to Connect to a Network
Note
To ensure agency compliance with FCC Class B electromagnetic emissions requirements (EMI), make
sure that you use a shielded RJ-45 Token Ring cable when connecting your router to a Token Ring
network.
Token Ring can operate at two different ring speeds: 4 and 16 Mbps. All devices on the Token Ring must
use the same operating speed.
Use a Token Ring cable to connect the router to a switch. Refer to the section "Token Ring Port Pinouts"
in the
pinouts. This document is available online and on the Cisco Documentation CD-ROM.

Serial Connections

Serial connections are provided by WAN interface cards and network modules. The WAN interface
cards can be installed in either slot of the 2-slot chassis; the network module can be installed in the
Cisco 2600 series single network module slot. For more information on WAN interface cards, refer to
the
refer to the
online and on the Cisco Documentation CD-ROM.
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•
Before you connect a device to a serial port, you need to know the following:
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Configuring Serial Connections

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.

Serial DTE or DCE Devices

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.) If you cannot determine the device type in
the documentation, see
Cisco 2600 Series Routers Hardware Installation Guide
2-10
Cisco Modular Access Router Cable Specifications
Cisco Interface Cards Hardware Installation
Cisco Network Modules Hardware Installation
For information about installing WAN interface cards, refer to the
Installation Guide.
For information about installing network modules, refer to the
Installation Guide.
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
Table 2-3
online document for the Token Ring port
Guide. For more information on network modules,
Guide. These documents are accessible
to help you select the proper device type.
Chapter 2 Preparing to Install the Router
Cisco Interface Cards Hardware
Cisco Network Modules Hardware
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