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WAN, LAN, and Voice Connections
The connections and cables listed here are described in detail in the following documents:
• Cisco 3700 Series Routers Hardware Installation Guide
• Cisco Network Modules Hardware Installation Guide
• Cisco Interface Cards Installation Guide
• Cisco Modular Access Router Cable Specifications
For information about accessing these documents, see the “Where to Go Next” section on page 25.
Table 3 summarizes some typical WAN, LAN, and voice connections for Cisco 3725 routers.
Note If the chassis is rear mounted, brackets with slots provide cable-tie attachment points.
5 Power Up the Router
Checklist for Power-Up
You are ready to power up the Cisco router if the following steps are completed:
• The chassis is securely mounted and grounded.
Table 3 WAN, LAN, and Voice Connections
Port or Connection Port type, color Connection: Cable
Fast Ethernet RJ-45, yellow, Ethernet hub Straight-through Ethernet
T1/E1 WAN RJ-48C/CA81A, blue T1 or E1 network RJ-48 T1E1
Cisco serial 60-pin D-sub, blue CSU/DSU and serial network or
equipment
Cisco serial transition cable that matches
the signaling protocol (EIA/TIA-232,
EIA/TIA-449, V.35, X.21, or
EIA/TIA-530) and the serial port
operating mode (DTE or DCE).
1
1. See the Cisco Modular Access Router Cable Specifications document for information about selecting these cables.
Cisco Smart serial Cisco Smart compact
connector, blue
CSU/DSU and serial network or
equipment (for WIC-2T and
WIC-2A/S only)
DSL RJ-11C/CA11A,
lavender
Network demarcation device for
service provider’s DSL interface
RJ-11
T1/E1 digital voice RJ-48C/CA81A, tan Digital PBX RJ-48 T1/E1 cable
Analog voice FXS RJ-11, gray Telephone, fax RJ-11
Analog voice FXO RJ-11, pink Central office, analog PBX RJ-11
Analog voice E&M RJ-11, brown Analog PBX RJ-11
BRI S/T WAN
(external NT1)
RJ-45/CB-1DA,
orange
NT1 device or private integrated
network exchange (PINX)
RJ-45 straight-through
BRI U WAN
(built-in NT1)
RJ-49C/CA-A11, red ISDN network RJ-48 straight-through
CT1/PRI T1 External T1 CSU DB-15 T1 serial cable
CT1/PRI-CSU T1 RJ-48C/CA81A interface RJ-48 straight-through
CE1/PRI E1 E1 network DB-15 to BNC, DB-15 to DB-15,
DB-15 to twinax, or DB-15 to RJ-45
56/64-kbps DSU/CSU 8-pin modular, blue RJ-48S interface RJ-48 straight-through
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