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Cisco 2900 and 3900 Series Hardware Installation
OL-18712-01
Chapter 3 Installing and Connecting the Router
Connecting WAN, LAN, and Voice Interfaces
Step 2 Connect the DB-9 end of the console cable to the DB-9 end of the modem adapter.
Step 3 Connect the DB-25 end of the modem adapter to the modem.
Step 4 Make sure that your modem and the router auxiliary port are configured for the same transmission speed
(up to 115200 bps is supported) and for mode control with data carrier detect (DCD) and data terminal
ready (DTR) operations.
Connecting WAN, LAN, and Voice Interfaces
This section describes how to connect WAN, LAN, and voice interface cables. It covers the following
topics:
• Ports and Cabling, page 3-43
• Connection Procedures and Precautions, page 3-44
Note One or two Ethernet cables are typically provided with the router. Additional cables and transceivers can
be ordered from Cisco. For ordering information, contact customer service. For cable pinouts, see the
Cisco Modular Access Router Cable Specifications document.
Warning
Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.
Statement 1021
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
Caution To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
connect Gigabit Ethernet ports using RJ-45 connectors for shielded twisted pair cable only to
intra-building or unexposed wiring or cable. The intrabuilding cable must be shielded and the shield
must be grounded at both ends. The intra-building port(s) of the equipment or subassembly must not be
metallically connected to interfaces that connect to the OSP or its wiring. These interfaces are designed
for use as intra-building interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE, Issue
4) and require isolation from the exposed OSP cabling. The addition of Primary Protectors is not
sufficient protection in order to connect these interfaces metallically to OSP wiring.
Warning
Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
Statement 1036
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