Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide
Router Cabling Procedures
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Table Of Contents

Router Cabling Procedures

Cabling for Nonwireless Routers

Typical Installations

Connecting the Radio Antennas to the Wireless Router

Connecting the Power-over-Ethernet Module (Optional)

Connecting a Server, PC, or Workstation

Connecting an External Ethernet Switch (Optional)

Connecting a Broadband Modem

Connecting a Terminal or PC to the Console Port

Connecting an Async Modem to the Console Port

Connecting an ISDN S/T Port

Connecting an ADSL Line—ADSLoPOTS Port

Connecting an ADSL Line—ADSLoISDN Port

Connecting a G.SHDSL Line

Connecting the AC Adapter

Verifying Router Operations

What to Do Next


Router Cabling Procedures

This chapter describes the cabling procedures for Cisco 851, Cisco 857, Cisco 871, Cisco 876, Cisco 877, and Cisco 878 routers. It contains the following sections:

•Cabling for Nonwireless Routers

•Typical Installations

•Connecting the Radio Antennas to the Wireless Router

•Connecting the Power-over-Ethernet Module (Optional)

•Connecting a Server, PC, or Workstation

•Connecting an External Ethernet Switch (Optional)

•Connecting a Broadband Modem

•Connecting a Terminal or PC to the Console Port

•Connecting an Async Modem to the Console Port

•Connecting an ISDN S/T Port

•Connecting an ADSL Line—ADSLoPOTS Port

•Connecting an ADSL Line—ADSLoISDN Port

•Connecting a G.SHDSL Line

•Connecting the AC Adapter

•Verifying Router Operations

•What to Do Next

Note Read Chapter 2 "Preinstallation Information," before you start the cabling procedures, making sure to follow the safety warnings and guidelines in the "Safety Warnings and Guidelines" section.

Note The router and the optional power-over-Ethernet (PoE) module should be mounted before being connected to the devices. See Chapter 3 "Router and PoE Module Mounting Procedures."

Cabling for Nonwireless Routers

Some portions of this document do not apply to nonwireless router models. Although illustrations show the router with antennas attached, the nonwireless routers do not have antennas or connectors on the back panel. However, except for the "Connecting the Radio Antennas to the Wireless Router" section, the procedures for connecting devices to the router are the same for wireless and nonwireless routers.

Typical Installations

Typical installations of the Cisco 850 series and Cisco 870 series routers are depicted in Figure 4-1 through Figure 4-4, as follows:

•Cisco 851 and Cisco 871 router—See Figure 4-1.

•Cisco 857 and Cisco 87 router—See Figure 4-2.

•Cisco 876 router—See Figure 4-3.

•Cisco 878 router—See Figure 4-4.

Figure 4-1 shows a typical installation of a Cisco 851 or Cisco 871 router. This figure shows the back panel of a Cisco 871 router, which has two USB ports. The Cisco 851 router does not have any USB ports; however, the connections on the other ports are the same for both the Cisco 851 and Cisco 871 routers.

Figure 4-1 Typical Installation of a Cisco 851 or Cisco 871 Router

1

Ethernet connection to an external switch

4

Console port

2

Ethernet connection to a PC

5

Power adapter

3

WAN connection using a broadband modem to the Internet

   

Figure 4-2 Typical Installation of a Cisco 857 or Cisco 877 Router

1

Ethernet connection to an external switch

4

Console port

2

Ethernet connection to a PC

5

Power adapter

3

ADSL-over-POTS connection

   

Figure 4-3 Typical Installation of a Cisco 876 Router

1

Ethernet connection to an external switch

4

ADSL-over-ISDN connection

2

Ethernet connection to a PC

5

Console port

3

ISDN S/T connection

6

Power adapter


Figure 4-4 Typical Installation of a Cisco 878 Router

1

Ethernet connection to an external switch

4

G.SHDSL connection

2

Ethernet connection to a PC

5

Console port

3

ISDN S/T connection

6

Power adapter


Connecting the Radio Antennas to the Wireless Router

If you selected the wireless option for the router, follow these steps to attach the radio antennas:

Step 1 Attach an antenna to a reverse-polarity threaded Neill-Concelman (RP-TNC) connector on the back of the router and tighten the antenna hand-tight.

Step 2 Orient the antenna vertically:

a. If the router is being mounted on a desk, orient the antenna straight up.

b. If the router is being mounted on a wall, orient the antenna straight down.

Connecting the Power-over-Ethernet Module (Optional)

If you purchased a power-over-Ethernet (PoE) module to provide inline power to devices, connect the four Ethernet cables on the PoE module to the four LAN Ethernet ports on the router. Make sure you connect all four Ethernet cables. If the cables are too close together for easy insertion, move the plastic cable guard away from the connector end of the cable. See Figure 4-5.

Caution Do not connect the PoE module power supply to the PoE module before you connect the PoE module to the router. For information about connecting the power supply to the PoE module, see the "Connecting the AC Adapter" section.

Figure 4-5 Connecting the Power-over-Ethernet Module to the Router

1

Router

4

PoE module

2

Router Ethernet ports

5

Plastic cable guard

3

Ethernet cables connecting the PoE module to the router

   

After you connect the PoE module to the router, connect the Ethernet devices to the ports on the PoE module, rather than to the Ethernet ports on the router.

Note When you connect a device (such as a PC or IP phone) to the PoE module, you may notice a 1- to 2-second delay before the LED indicator for the port comes on.

Connecting a Server, PC, or Workstation

To connect a server, PC, or workstation to a built-in Ethernet switch port, follow the steps given after Figure 4-6, which shows a Cisco 871 router connected to a PC. The procedure applies to Cisco 850 series and Cisco 870 series routers.

Figure 4-6 Connecting a Server, PC, or Workstation

1

Router

4

PC

2

Yellow Ethernet cable

5

RJ-45 port on the network interface card (NIC)

3

Built-in Ethernet switch port on the router

   

Perform the following steps to connect the PC (or other Ethernet devices) to a port on the built-in Ethernet switch.

Caution Leave the PCs turned off until after you have completed all connections to the router.

Step 1 Connect one end of the yellow Ethernet cable to a built-in Ethernet switch port on the router.

Step 2 Connect the other end of the cable to the RJ-45 port on the NIC installed in the PC, server, or workstation.

Step 3 (Optional) Connect additional servers, PCs, or workstations to the other built-in Ethernet switch ports.

Connecting an External Ethernet Switch (Optional)

If more than four PCs need to be connected to each other in an office, you may connect an external Ethernet switch to the router's built-in switch to add additional Ethernet connections to the router.

Although Figure 4-7 shows a Cisco 871 router, the procedure in this section applies to all Cisco 850 series and Cisco 870 series routers.

To connect an external Ethernet switch to a built-in Ethernet switch port on the router, follow the steps given after Figure 4-7, which shows this connection.

Figure 4-7 Connecting to an Ethernet Switch

1

Yellow Ethernet cable connecting an external Ethernet switch to a built-in Ethernet switch port on the router

2

Available port on the external Ethernet switch


Perform the following steps to connect the router to an external Ethernet switch:

Step 1 Connect one end of the yellow Ethernet cable to a built-in Ethernet switch port on the router.

Step 2 Connect the other end of the cable to the available port on the Ethernet switch to add additional Ethernet connections.

Step 3 Turn on the Ethernet switch.

Connecting a Broadband Modem

This section applies only to Cisco 851 and Cisco 871 routers. You can connect to the Internet by connecting a broadband modem. To connect to an installed DSL, cable, or long-reach Ethernet modem, follow the steps given after Figure 4-8, which shows this connection.

Figure 4-8 Connecting to a Broadband Modem

1

Ethernet WAN port on the router

2

Available port on the modem


Perform the following steps to connect the router to an installed DSL, cable, or long-reach Ethernet modem:

Step 1 Connect one end of the yellow cable to the Ethernet WAN FE4 port.

Step 2 Connect the other end of cable to an available port on the modem.

Step 3 Follow the instructions provided with your broadband modem to determine which port on the modem to connect to.

Step 4 Turn on the broadband modem if it is not already turned on.

Note It is recommended that you use the Cisco Router and Security Device Manager (SDM) application to configure the Internet connection settings. See the Cisco Router and Security Device Manager (SDM) Quick Start Guide for more information.

Connecting a Terminal or PC to the Console Port

The console port is a service port to which you can connect a terminal or PC either to configure the software by using the command-line interface (CLI) or to troubleshoot problems with the router.

Although Figure 4-9 shows a Cisco 871 router, the procedure in this section applies to all Cisco 850 series and Cisco 870 series routers.

To connect a terminal or PC to the console port, follow the steps given after Figure 4-9.

Figure 4-9 Connecting a Terminal or PC to the Console Port

1

Console port on the router

2

DB-9 connector


Perform the following steps to connect the router's console port to a terminal or PC:

Step 1 Connect the RJ-45 connector on the light blue cable to the router console port.

Step 2 Connect the DB-9 connector to a terminal or PC.

Connecting an Async Modem to the Console Port

The Cisco 850 series and Cisco 870 series routers support the dial backup function, which allows a user to connect an analog modem to the console port as a backup link to the WAN port in case the ADSL service goes down.

Note To connect an analog modem to the console port, you will need an optional router modem cable. Contact your router vendor to order this cable.

Although Figure 4-10 shows the async modem connection to the console port on the Cisco 857 router, this connection applies to all Cisco 850 series and Cisco 870 series routers.

Figure 4-10 Connecting an Async Modem to the Console Port

1

Router console port

4

Wall jack connected by an RJ-11 telephone cable to a port on an async modem

2

Router modem cable

5

Telephone connected by an RJ-11 telephone cable to a port on an async modem (optional)

3

Available port on an async modem

   

Perform the following steps to connect the console port on the router to an async modem:

Step 1 Connect the RJ-45 end of the router modem cable to the console port.

Step 2 Connect the DB-25 connector end of the router modem cable to an available port on the async modem.

Step 3 Connect one end of the RJ-11 telephone cable to a wall jack, and then connect the other end of the RJ-11 cable to the modem.

Step 4 (Optional) Connect one end of an RJ-11 telephone cable to a telephone, fax, or other device, and then connect the other end of the RJ-11 cable to the modem.

Connecting an ISDN S/T Port

This section applies to Cisco 876 and Cisco 878 routers. You can connect the ISDN S/T port to the ISDN service provider as a backup link to the WAN port in case the ADSL service goes down.

The cabling requirements and information for the ISDN S/T connection follow:

•You must provide two unshielded Category 5 cables. The first cable connects the NT1 box to the splitter, and the second cable connects the splitter to the wall jack.

•There are RJ-45 connectors at both ends of the default orange ISDN S/T cable. However, an RJ-45-to-RJ-11 ISDN S/T cable is available upon request if the wall jack at the site requires an RJ-11 connector. Contact your router reseller for the appropriate cable.

Caution Both LAN and WAN ports can use RJ-45 connectors. Use caution when connecting cables to these connectors. To avoid damage to the router, do not connect telephone-network voltage (TNV) circuits (such as ISDN or DSL circuits) to safety extra-low voltage (SELV) circuits (such as LAN circuits).

Although Figure 4-11 shows an ISDN S/T connection for a Cisco 876 router, this connection also applies to a Cisco 878 router.

Figure 4-11 Connecting the ISDN S/T Port to the ISDN Service Provider

1

One end of the ISDN S/T cable that connects to the ISDN S/T port on the router

5

ADSL splitter that is provided by the ADSL service provider

2

Network termination 1 (NT1) box

6

Other end of the first unshielded Category 5 cable that connects to the telephone line port on the splitter

3

Other end of the ISDN S/T cable that connects to the S/T port on the NT1 box

7

One end of the second unshielded Category 5 cable that connects to the telecommunication service port on the splitter

4

One end of the first unshielded Category 5 cable that connects to the U port on the NT1 box

8

Other end of the second unshielded Category 5 cable that connects to the wall jack


Perform the following steps to connect the ISDN S/T port to the ISDN service provider:

Step 1 Connect one end of the orange ISDN S/T cable to the ISDN S/T port on the router.

Step 2 Connect the other end of the orange ISDN S/T cable to the S/T port on the NT1 box.

Step 3 Connect the first unshielded Category 5 cable from the U port on the NT1 box to the telephone line port on the splitter.

Step 4 Connect the second unshielded Category 5 cable from the telecommunication service port on the splitter to the wall jack to allow a link to the network service provider.

Connecting an ADSL Line—ADSLoPOTS Port

This section applies only to Cisco 857 and Cisco 877 routers. Follow the steps shown after Figure 4-12 to connect an asymmetric digital subscriber line (ADSL) over plain old telephone service (ADSLoPOTS) port on the router.

Note The DSL line must have been provisioned by your service provider and correctly configured for the LED to show the carrier detect (CD) status. If the CD LED is not on, check with the DSL service provider.

Figure 4-12 Connecting the ADSLoPOTS Port to an ADSL Line

1

ADSLoPOTS port on the router

2

End of ADSL cable that connects to the wall jack


Caution Cisco Systems DSL WAN Interfaces are tested for compliance with regulatory standards such as FCC Part 68, ITU-T K.21, IEC 61000-4-5, and CSA/EN/IEC/UL 60950-1. These standards assume Primary Protection devices protect the Customer Premise Equipment (CPE). These devices are normally installed by the service provider, local exchange carrier or qualified service person and are located at the telecom service provider entrance, network interface box, or demarcation point. See Figure 4-13 for the likely location of the primary protection device. The primary protection device must be suitable for the xDSL interface employed.

Please contact your sales team or qualified service person for further information and installation.

Figure 4-13

Primary Protection Device Location

Perform the following steps to connect the ADSL cable to a cable wall jack:

Step 1 Connect one end of the ADSL cable to the ADSLoPOTS port on the router.

Step 2 Connect the other end of the cable to the wall jack.

Connecting an ADSL Line—ADSLoISDN Port

This section applies only to the Cisco 876 router. The procedure for connecting an asymmetric digital subscriber line (ADSL) depends on the router and, in some cases, on the location. Follow the steps shown after Figure 4-15 to connect the ADSL cable to a cable wall jack.

Note The DSL line must have been provisioned by your service provider and correctly configured for the ADSL CD LED to show the status. If the ADSL CD LED is not on, check with the DSL service provider.

Note You must provide the unshielded Category 5 cable for connecting to the ADSL ISDN splitter that is provided by the service provider.

Caution Cisco Systems DSL WAN Interfaces are tested for compliance with regulatory standards such as FCC Part 68, ITU-T K.21, IEC 61000-4-5, and CSA/EN/IEC/UL 60950-1. These standards assume Primary Protection devices protect the Customer Premise Equipment (CPE). These devices are normally installed by the service provider, local exchange carrier or qualified service person and are located at the telecom service provider entrance, network interface box, or demarcation point. See Figure 4-14 for the likely location of the primary protection device. The primary protection device must be suitable for the xDSL interface employed.

Please contact your sales team or qualified service person for further information and installation.

Figure 4-14

Primary Protection Device Location

Figure 4-15 Connecting the ADSLoISDN Port to an ADSL Line

1

One end of the ADSL cable that connects to the router

4

RJ-11 end of the ADSL cable that connects to the splitter

2

ADSL splitter

5

Other end of the unshielded Category 5 cable that connects to the wall jack

3

RJ-11 end of an unshielded Category 5 cable that connects to the splitter

   

Perform the following steps to connect the ADSL line to a cable wall jack:

Step 1 Connect the RJ-11 end of the ADSL cable to the ADSLoISDN port on the router.

Step 2 Connect the other RJ-11 end of the ADSL cable to the local ADSL connector port on the ADSL splitter (provided by the ADSL service provider).

Step 3 Connect the unshielded Category 5 cable from the outside ADSL port on the splitter to a wall jack.

Connecting a G.SHDSL Line

This section applies to the Cisco 878 router only. To connect the router to a G.SHDSL line, perform the steps given after Figure 4-16.

Figure 4-16 Connecting the G.SHDSL Line

1

G.SHDSL port on the router

2

DSL wall jack


Caution Cisco Systems DSL WAN Interfaces are tested for compliance with regulatory standards such as FCC Part 68, ITU-T K.21, IEC 61000-4-5, and CSA/EN/IEC/UL 60950-1. These standards assume Primary Protection devices protect the Customer Premise Equipment (CPE). These devices are normally installed by the service provider, local exchange carrier or qualified service person and are located at the telecom service provider entrance, network interface box, or demarcation point. See Figure 4-17 for the likely location of the primary protection device. The primary protection device must be suitable for the xDSL interface employed.

Please contact your sales team or qualified service person for further information and installation.

Figure 4-17

Primary Protection Device Location

Perform the following steps to connect the router to an installed DSL:

Step 1 Connect one end of the lavender DSL cable to the G.SHDSL port on the router.

Step 2 Connect the other end of the cable to the DSL wall jack.

Connecting the AC Adapter

To connect the AC adapter, follow the steps given after Figure 4-18. Although the illustration shows the Cisco 871 router, the procedure applies to all Cisco 850 series and Cisco 870 series routers.

Warning The device is designed to work with TN power systems. Statement 19
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120VAC, 20A U.S. (240VAC, 16 to 20A international) is used on the phase conductors (all current-carrying conductors). The fuse or circuit breaker must have adequate safety approvals recognized by the country of usage. Statement 119

Figure 4-18 Connecting the AC Adapter (No PoE Module)

1

Router

4

Desktop power adapter

2

Router input jack

5

Power cord plug

3

Power cord

   

Figure 4-19 Connecting AC Adapters to the Router and to the PoE Module

1

Router

5

Router power adapter

2

Ethernet cables on the PoE module

6

PoE module power adapter plug

3

PoE module

7

Router power adapter plug

4

PoE module power adapter

   

Perform the following steps to connect power to the router and to the PoE module:

Step 1 Connect one end of the power supply cable to the input jack of the router.

Step 2 Connect the other end of the power supply cable to the router power adapter.

Step 3 If a PoE module is connected to the router, connect the PoE module power adapter to the PoE module.

Step 4 Plug the power cord of the router power adapter into an electrical outlet. If a PoE module is connected to the router, plug the power cord for the PoE module into an electrical outlet.

Verifying Router Operations

To verify that all devices are properly connected to the router, turn on all the connected devices; then use Table 4-1 to help you verify correct router operation by checking the LEDs.

Table 4-1 Verifying the Router Operation

Power and Link
LEDs to Check
Normal Patterns

Power

OK

On when power is supplied to router.

To servers, PCs, or workstations connected to the LAN ports (FE0, FE1, FE2, or FE3)

ETHERNET LAN 0, ETHERNET LAN 1, ETHERNET LAN 2, or ETHERNET LAN 3

ETHERNET LAN 0, ETHERNET LAN 1, ETHERNET LAN 2, or ETHERNET LAN 3 is on when the LAN port is physically connected to a server, PC, or workstation.

WAN RXD

WAN RXD blinks when a port on the built-in Ethernet switch receives an Ethernet packet.

WAN TXD

WAN TXD blinks when a port on the built-in Ethernet switch sends an Ethernet packet.

To broadband modem, or to an external Ethernet switch

WAN LNK

WAN LNK is on when the WAN port is physically connected to a broadband modem or to an external Ethernet switch.

WAN RXD

WAN RXD blinks when the WAN port receives an Ethernet packet.

WAN TXD

WAN TXD blinks when the WAN port sends an Ethernet packet.

To xDSL line (ADSL or G.SHDSL)

ADSL CD, G.SHDSL CD

WAN xDSL carrier detect status:

•On when the line is connected to the ADSL or G.SHDSL DSLAM.

•Blinks when the router tries to connect to the ADSL or G.SHDSL DSLAM.

ADSL RXD, G.SHDSL RXD

ADSL RXD or G.SHDSL RXD blinks when the xDSL line receives a packet.

ADSL TXD, G.SHDSL TXD

ADSL RXD or G.SHDSL TXD blinks when the xDSL line sends a packet.

To ISDN line

ISDN LNK

ISDN line status—Green if the ISDN line is up.

ISDN B1 and ISDN B2

ISDN BRI channel status—Orange if the channel is up.

To PPP clients

PPP

PPP is on if either a PPPoE or PPPoA client is running.

To VPN tunnel

VPN

VPN is on if a crypto session is running.

To wireless LAN

WLAN OK

Wireless LAN link status:

•Solid green if at least one client is associated.

•Blinks if no client is associated.

WLAN DATA

WLAN DATA is on if there is traffic on the wireless link.


What to Do Next

After verifying that the router cabling is correct and the power up is successful, perform the initial configuration of the router as described in Chapter 5 "Initial Configuration."