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Table 1 summarizes the basic WAN and LAN connections for the Cisco 1841 router.
Console, Auxiliary, and USB Port Connections
The connections described in Table 2 provide system management access.
Note The USB port (version 1.1) is intended for future use only.
Table 1 WAN and LAN Connections
Port or Connection Port Type, Color
1
1. The color codes are specific to cables shipped by Cisco
Connected To: Cable
Fast Ethernet (FE) RJ-45, yellow Ethernet hub Crossover to connect to a router
Straight-through to connect to a
switch
T1/E1 WAN RJ-48C T1 or E1 network or CSU/DSU RJ-48 T1/E1 straight-through
(Crossover to connect ot a PBX or
any other equipment)
Cisco serial (1T) 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).
Refer to the
Cisco Modular Access
Router Cable Specifications
document for information about
selecting these cables.
Cisco Smart serial (2T) Cisco Smart compact
connector, blue
CSU/DSU and serial network or
equipment
For WIC-2T and WIC-2A/S only
DSL RJ-11C/RJ-14C Network demarcation device for
service provider’s DSL interface
RJ-11 straight-through for 2-wire
RJ-14 straight-through for 4-wire
BRI S/T WAN
(external NT1
2
)
2. NT1 = Network Termination 1
RJ-45, orange NT1 device or PINX
3
3. PINX = Private integrated network exchange
RJ-45 straight-through
BRI U WAN
(built-in NT1)
RJ-49C/CA-A11,
orange
ISDN network RJ-49 straight-through
Analog modem RJ-11 PSTN RJ-11 straight-through
56/64-kbps
CSU/DSU
8-pin modular RJ-48S interface RJ-48 straight-through
Table 2 Console and Auxiliary Port Connections
Port or Connection Color or Type Connected To: Cable
Console Light blue PC or ASCII terminal communication
port (usually labeled COM)
RJ-45-to-DB-9 console cable
Auxiliary Black Modem for remote access RJ-45-to-DB-9 console cable and
DB-9-to-DB-25 adapter
USB — Peripheral devices USB cable