Table of Contents
Advertisement
Modem Connection
For a modem connection, use a standard modem (straight) cable.
ISDN Connections
Use a BRI cable (not included) to connect the router directly to an ISDN port. (See Table 2.)
Warning
detach the end away from the router first to avoid possible electric shock. Network hazardous
voltages also are present on the system card in the area of the BRI port (RJ-45 connector), regardless
of when power is turned OFF. (To see translated versions of this warning, refer to the appendix
"Translated Safety Warnings" in the Catalyst 3100 Configuration and Installation Guide.)
Warning
user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided
equipment or connection hardware. Any hardwired connection (other than by a nonremovable,
connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers. (To see
translated versions of this warning, refer to the appendix "Translated Safety Warnings" in the
Catalyst 3100 Configuration and Installation Guide.)
Table 2 lists the specifications for ISDN BRI cables. Refer to the section "ISDN BRI Port and Cable
Pinouts" for pinouts.
Table 2
Specification
Resistance (at 96 kHz)
Capacitance (at 1 kHz)
Impedance (96 kHz)
Wire diameter
Distance limitation
1
Synchronous Serial Connections
Before you connect a device to the synchronous serial port (labeled "SERIAL"), you will need to
know the following:
•
The type of device, DTE or DCE, you are connecting to the synchronous serial interface.
•
The type of connector, male or female, required to connect to the device.
•
The signaling standard required by the device.
DTE or DCE
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 card. A DTE device does not provide a clock signal. DTE devices usually connect to DCE
Network hazardous voltages are present in the BRI cable. If you detach the BRI cable,
The ISDN connection is regarded as a source of voltage that should be inaccessible to
ISDN BRI Cable Specifications
High-Capacitance Cable
160 ohms/km
120 nF
75 ohms
0.024 in. (0.6 mm)
32.8 ft (10 m)
nF = nanoFarad.
Low-Capacitance Cable
160 ohms/km
1
/km
30 nF/km
150 ohms
0.024 in. (0.6 mm)
32.8 ft (10 m)
Router Card (WS-X3011) Configuration Note
Modem Connection
5
Advertisement
Table of Contents
