Cisco Systems 1800 Series quick start WAN and LAN Connections, From the router first. Statement

•Cisco Modular Access Router Cable Specifications at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/hw_inst/cabling/marcabl.htm

WAN and LAN Connections

The connections and cables listed in Table 1 are described in detail in the Cisco 1800 series hardware installation documents at the following URL:

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1800/hw/index.htm

Caution Do not connect a WAN, telephone, or fax cable to an interface card until you have completed the installation procedure.

Warning	Hazardous network voltages are present in WAN ports regardless of whether power to the router is OFF or ON. To
	avoid electric shock, use caution when working near WAN ports. When detaching cables, detach the end away
	from the router first. Statement 1026

Table 1 summarizes the basic WAN and LAN connections for the Cisco 1841 router.

Table 1	WAN and LAN Connections
Port or Connection		Port Type, Color1	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	Cisco serial transition cable that
			equipment	matches the signaling protocol
				(EIA/TIA-232, EIA/TIA-449, V.35,
Cisco Smart serial (2T)		Cisco Smart compact	CSU/DSU and serial network or
				X.21, or EIA/TIA-530) and the serial
		connector, blue	equipment
				port operating mode (DTE or DCE).
			For WIC-2T and WIC-2A/S only
				Refer to the Cisco Modular Access
				Router Cable Specifications
				document for information about
				selecting these cables.
DSL		RJ-11C/RJ-14C	Network demarcation device for	RJ-11 straight-through for 2-wire
			service provider’s DSL interface	RJ-14 straight-through for 4-wire
BRI S/T WAN		RJ-45, orange	NT1 device or PINX3	RJ-45 straight-through
(external NT12)
BRI U WAN		RJ-49C/CA-A11,	ISDN network	RJ-49 straight-through
(built-in NT1)		orange
Analog modem		RJ-11	PSTN	RJ-11 straight-through
56/64-kbps		8-pin modular	RJ-48S interface	RJ-48 straight-through
CSU/DSU

1.The color codes are specific to cables shipped by Cisco

2.NT1 = Network Termination 1

3.PINX = Private integrated network exchange

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