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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 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 24.
Table 3 summarizes some typical WAN, LAN, and voice connections for Cisco 3745 routers.
Table 3 WAN, LAN, and Voice Connections
Port or Connection Port Type, Color Connected to: Cable
FastEthernet RJ-45, yellow, Ethernet hub or switch Straight-through Ethernet
T1/E1 WAN RJ-48C/CA81A, blue T1 or E1 network RJ-48 T1
Cisco serial 60-pin D-sub 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 digital voice RJ-48C/CA81A, tan Digital PBX RJ-48 T1 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-48C/CA81A, red NT1 device or private integrated
network exchange (PINX)
RJ-48
BRI U WAN
(built-in NT1)
RJ-49C/CA-A11,
orange
ISDN network RJ-49
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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