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Connecting an ISDN S/T Port

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Connecting an ISDN S/T Port Chapter 4 Router Cabling Procedures Perform the following steps to connect the console port on the router to an async modem: Step 1 Step 2 Step 3 Step 4 Connect the RJ-45 end of the router modem cable to the console port. Connect the DB-25 connector end of the router modem cable to an available port on the async modem. 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. (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. 4-14 Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide OL-5331-01

Section	Page
Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide	1
Contents	3
Preface	7
Objective	7
Audience	7
Organization	8
Conventions	8
Related Documentation	14
Obtaining Documentation and Submitting a Service Request	14
Product Overview	15
General Descriptions of the Router Models	15
Cisco 851 and Cisco 871 Ethernet-to-Ethernet Routers	15
Router Ports on the Cisco 851 and Cisco 871 Back Panel	17
USB Port Power Allocation on the Cisco 871 Router	17
Cisco 857 and Cisco 877 ADSL-over-POTS Routers	17
Router Ports on the Cisco 857 and Cisco 877 Back Panel	19
Cisco 876 ADSL-over-ISDN Router	19
Router Ports on the Cisco 876 Back Panel	20
Cisco 878 SHDSL Router	20
Router Ports on the Cisco 878 Back Panel	21
Feature Summary	21
Hardware Features	23
Serial Number Location	23
LED Indicators on the Routers	23
Integrated 802.11b/g Radio Module (Wireless Models Only)	25
Supported Cisco Radio Antennas (Wireless Models Only)	26
External Power-over-Ethernet Module (Optional)	26
LED Indicators on the PoE Module	30
Router Memory	30
Router Hardware Security	31
Regulatory Compliance	31
Preinstallation Information	33
Safety Warnings and Guidelines	33
Additional Warnings for Wireless Routers	35
General Safety Guidelines for Wireless Routers	35
Preventing Electrostatic Discharge Damage	35
Preventing Damage to the Router	36
Unpacking the Box	36
Preparing for Installation	37
What to Do Next	38
Router and PoE Module Mounting Procedures	39
Connecting Antennas to the Wireless Router	39
Mounting on a Table	39
Mounting on a Wall	40
Guidelines for Wall Mounting	40
Mounting the Router on a Wall	40
Mounting the PoE Module on a Wall	43
What to Do Next	44
Router Cabling Procedures	45
Cabling for Nonwireless Routers	46
Typical Installations	46
Connecting the Radio Antennas to the Wireless Router	50
Connecting the Power-over-Ethernet Module (Optional)	51
Connecting a Server, PC, or Workstation	52
Connecting an External Ethernet Switch (Optional)	53
Connecting a Broadband Modem	55
Connecting a Terminal or PC to the Console Port	56
Connecting an Async Modem to the Console Port	57
Connecting an ISDN S/T Port	58
Connecting an ADSL Line-ADSLoPOTS Port	60
Connecting an ADSL Line-ADSLoISDN Port	61
Connecting a G.SHDSL Line	63
Connecting the AC Adapter	65
Verifying Router Operations	68
What to Do Next	69
Initial Configuration	71
Installing Cisco Router and Security Device Manager	71
Initial Configuration Using Cisco SDM	71
Initial Configuration Using the Setup Command Facility	72
Initial Configuration Using the Cisco CLI-Manual Configuration	74
Verifying the Initial Configuration	75
What to Do Next	75
Troubleshooting	77
Before You Call Your Cisco Reseller	77
Problems During First Startup	78
Problems After the Router Is Running	79
Specifications	81
Router Specifications	81
Power-over-Ethernet Module Specifications	82
LAN Port Pinouts	83
Console Connector Pinouts	84
ADSL Port Connector Pinouts	84
Power Output Connector Pinouts	85
Cable Specifications	85
Ethernet Cable Specifications	86
Maximum Cable Length	86

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4-14

Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide

OL-5331-01

Chapter 4

Router Cabling Procedures

Connecting an ISDN S/T Port

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.