Serial Connections; Configuring Serial Connections; Serial Dte Or Dce Devices; Signaling Standards Supported - Cisco 1841 - 3G Bundle Router Hardware Installation Manual
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Chapter 5
Cable Information and Specifications for Cisco 1800 Series Routers (Modular)
See
connectors, and pinouts.
Serial Connections
Serial connections are provided by serial WAN interface cards (WICs). For more information on WICs,
see
Before you connect a device to a serial port, you need to know the following:
•
•
•
Configuring Serial Connections
The serial ports on the serial WICs use DB-60 connectors. Serial ports can be configured as DTEs or
DCEs, 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
for the device should indicate whether it is a DTE or DCE device. (Some devices have a jumper that
allows you to select either DTE mode or DCE mode.)
Table 5-1
Device Type
DTE
DCE
1. If pins protrude from the base of the connector, the connector is male.
2. If the connector has holes to accept pins, the connector is female.
Signaling Standards Supported
The synchronous serial ports available for the router support the following signaling standards:
EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA-530. You can order a Cisco DB-60 shielded serial
transition cable that has the appropriate connector for the standard you specify. The documentation for
the device that you want to connect should indicate the standard used for that device. The router end of
the shielded serial transition cable has a DB-60 connector, which connects to the DB-60 port on a serial
WIC. The other end of the serial transition cable is available with a connector appropriate for the
standard that you specify.
OL-5876-03
Cisco Modular Access Router Cable Specifications
Installing Cisco Interface Cards in Cisco Access
Type of device—data terminal equipment (DTE) or data communications equipment (DCE)—that
you are connecting to the synchronous serial interface
Type of connector—male or female—that is required for connecting to the device
Signaling standard that is required by the device
Typical DTE and DCE Devices
Gender
1
Male
2
Female
for information about Ethernet cables,
Routers.
Table 5-1
Typical Devices
Terminal
•
PC
•
Modem
•
CSU/DSU
•
Multiplexer
•
Cisco 1800 Series Routers (Modular) Hardware Installation Guide
Preparing to Connect to a Network
lists typical DTE and DCE devices.
5-3
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Troubleshooting
