2-10
Cisco 1900 Series Hardware Installation
OL-19084-02
Chapter 2 Preparing for Router Installation
Inspecting the Router
Warning
The ISDN connection is regarded as a source of voltage that should be inaccessible to 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.
Statement 23
Warning
Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF
or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables,
detach the end away from the unit first.
Statement 1026
Use a BRI cable (not included) to connect the BRI WIC directly to an ISDN.
Table 2-3
lists the
specifications for ISDN BRI cables. For information about pinouts, refer to the
Cisco Modular Access
Router Cable Specifications
online document, which is located on Cisco.com.
For more information on BRI WICs, refer to Cisco.com.
CSU/DSU Connections
CSU/DSU WICs are available that provide switched 56-kbps connections, or full or fractionalized T1
connections.
For more information on CSU/DSU WICs, refer to Cisco.com.
Inspecting the Router
Do not unpack the router until you are ready to install it. If the final installation site will not be ready
for some time, keep the chassis in its shipping container to prevent accidental damage. When you are
ready to install the router, proceed with unpacking it.
The router, cables, publications, and any optional equipment that you ordered may be shipped in more
than one container.
Inspect all items for shipping damage. If anything appears to be damaged, or if you encounter problems
installing or configuring your router, contact customer service. Warranty, service, and support
information is in the quick start guide that shipped with your router.
Table 2-3
ISDN BRI Cable Specifications
Specification
High-Capacitance Cable
Low-Capacitance Cable
Resistance (at 96 kHz)
160 ohms/km
160 ohms/km
Capacitance (at 1 kHz)
120 nF
1
/km
1.
nF = nanofarad
30 nF/km
Impedance (at 96 kHz)
75 ohms
150 ohms
Wire diameter
0.024 in (0.6 mm)
0.024 in (0.6 mm)
Distance limitation
32.8 ft (10 m)
32.8 ft (10 m)
