Cisco Systems 1751 User Manual 2
Cisco 1751 Voice-over-IP Quick Start Guide
The Cisco 1751 Voice over IP Quick Start Guide explains how to install WAN Interface Cards and Voice
Interface Cards, how to run configuration tools, and how to perform essential Voice-over-IP (VoIP)
configuration tasks.
This document contains the following sections:
• Audience, page 1
• Conventions, page 2
• Installing WAN and Voice Interface Cards, page 2
• Cisco Router and Security Device Manager, page 9
Audience
• Configuring Voice-over-IP, page 10
• List of Terms, page 30
• Obtaining Documentation, page 31
• Documentation Feedback, page 32
• Obtaining Technical Assistance, page 32
• Obtaining Additional Publications and Information, page 33
This guide is intended primarily for users who configure and maintain routers, but are not necessarily
familiar with tasks, the relationship between tasks, or the commands necessary to perform particular
tasks to configure VoIP. We assume that you are familiar with Cisco IOS software, IP and telephony
networks, and PBX operation for E&M installations.
List of Terms provides definitions for many of the technical terms used in this document.
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Copyright © 2003 Cisco Systems, Inc. All rights reserved.
Conventions
Conventions
This document uses the following conventions:
• Commands and keywords are in boldface.
• Optional keywords or arguments are in square brackets.
• Variables for which you supply values are in italic.
• Titles of publications and new words or concepts are in italic.
• Information the router displays on the console screen is in screen font.
• Information that you enter at the CLI is in boldface screen font.
Installing WAN and Voice Interface Cards
The Cisco 1751 router supports two slots that can be used to install either WAN Interface Cards (WICS)
or Voice Interface Cards (VICS), and one slot that can be used to install only a VIC.
If You Are Installing Voice Interface Cards
The router supports one to three Cisco voice interface cards (VICs). Each VIC provides two ports. You
need one VIC port for each voice connection.
Note To transmit voice calls over an IP WAN, you need (in addition to the VICs) at least one WAN interface
card (WIC) in the router to provide the connection to the WAN.
There are four types of VIC interfaces, as shown in Figure 3:
• FXS (foreign exchange station) interface connects directly to a standard telephone, fax machine, or
similar device. The FXS VIC interface supplies ringing voltage, dial tone, and similar signals to the
station. Ports on this VIC are color-coded gray.
• FXO (foreign exchange office) interface connects local calls to a PSTN central office or to a PBX
that does not support E&M signaling. This is the interface a standard telephone provides. Ports on
this VIC are color-coded pink.
• E&M is a signaling technique for two-wire and four-wire telephone and trunk interfaces. The E&M
VIC connects remote calls from an IP network to a PBX for local distribution. Ports on this VIC are
color-coded brown.
• The ISDN BRI NT/TE voice interface card provides a client-side (TE) ISDN S/T physical interface
for connection to an NT1 terminating an ISDN telephone network and can also be configured to
provide a network termination (NT) interface with phantom power. Each of its two ports can carry
two voice calls (one over each ISDN B channel), for a total of four calls per ISDN BRI card. At
present, the ISDN BRI VIC does not support ISDN devices such as digital telephone, fax, or modem.
Figure 1 shows a typical VIC.
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Figure 1 Voice Interface Card
VIC ports
Installing WAN and Voice Interface Cards
VIC
E&M
IN USE
1 0
SEE MANUAL BEFORE INSTALLATION
You should install and cable VICs before performing the software configuration tasks explained later in
this guide.
Warning
Caution VICs do not support online insertion and removal (hot swap). To avoid equipment damage, turn off
Be sure to observe all warnings and safety precautions in the installation guide.
electrical power and disconnect network cables before you insert a VIC in the router.
WIC and VIC Installation Procedure
Follow these steps, and refer to Figure 2 to insert a WIC or a VIC in the router:
Step 1 Make sure the router is turned off and is disconnected from the power supply.
Step 2 Loosen the thumbscrews on the WIC or VIC slot cover on the rear panel.
You should be able to loosen the screws using your fingers; however, if the screws are very tight, you
might need to use a Phillips screwdriver.
IN USE
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Step 3 Remove the metal plate that covers the card slot.
Step 4 Hold the card by the edges on either side of the card front panel, and line up the card edges with the
guides inside the card slot, as shown in Figure 2.
Step 5 Insert the card in the slot and gently push it into the router until the front panel of the card is flush with
the rear panel of the router.
Step 6 Tighten the screws.
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Installing WAN and Voice Interface Cards
Figure 2 Inserting a WIC or VIC in the Router
Model Cisco 1750
SLOT 1
SLOT 2
V
IC
IN USE
2
F
X
O
C
O
N
S
O
1
LE
SEE MANUAL BEFORE INSTALLATION
AU
X
IN USE
THIS SLOT
ACCEPTS
ONLY VOICE
0
INTERFACE
CARDS
PVDM OK
MOD OK
SLOT 2 OK
+5, +12, -12 VDC
V
2
IC
F
X
S
IN USE
1
SEE MANUAL BEFORE INSTALLATION
SLO
T 1 OK
SLOT 0 OK
IN USE
0
Guides
SLOT 0
FDX
100
LINK
10/100 ETHERNET
Interface card
If you need more detailed installation instructions, refer to the Cisco WAN Interface Cards Hardware
Installation Guide.
Connecting the FXS, FXO, and E&M VICs to the Network
If you installed FXS, FXO, or E&M VICs, use the following cables, and refer to Figure 3 to connect
them to the network:
• Standard RJ-11 modular telephone cable to connect FXS VIC ports (color-coded gray) to a
telephone or fax machine.
• Standard RJ-11 modular telephone cable to connect FXO VIC ports (color-coded pink) to the PSTN,
or to a PBX that does not support E&M signaling, through a telephone wall outlet.
• Standard RJ-48S connector and cable to connect E&M VIC ports (color-coded brown) to a PBX line.
The cable wiring depends on the type of connection. For details, refer to the Cisco WAN Interface
Cards Hardware Installation Guide.
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Figure 3 Connecting VICs to the Network
FXS VIC
VIC
IN USE
FXS
1 0
SEE MANUAL BEFORE INSTALLATION
FXO VIC
VIC
IN USE
FXO
1 0
SEE MANUAL BEFORE INSTALLATION
IN USE
IN USE
Installing WAN and Voice Interface Cards
E&M VIC
VIC
IN USE
E&M
1 0
SEE MANUAL BEFORE INSTALLATION
IN USE
PBX
10691
When you are finished, reinstall any network interface cables you removed and turn on power to the
router.
Connector Pinouts for FXS, FXO, and E&M VICs
Figure 4 shows the wiring patterns for FXS and FXO VIC connectors, and Table 1 lists the FXS and FXO
pinouts.
Note Pins that are not used should not be connected.
Figure 4 RJ-11 Wiring for FXS and FXO Connectors
1
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H11420
Table 1 FXS and FXO Pinouts
Pin Signal
1–
2–
3Ring
4Tip
5–
6–
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Installing WAN and Voice Interface Cards
Figure 5 shows the wiring pattern for an E&M connector, and Ta b l e 2 lists the E&M pinouts.
Note The E&M VIC pinout depends on the PBX type and connection. Pins that are not used should not be
connected.
Figure 5 RJ-48S Wiring for E&M Connectors
1
Table 2 E&M Pinouts
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H11421
Pin Signal Description
1 SB –48V signaling battery
2 M-lead Signaling input
3 R Ring, audio input
4 R or R1 Ring, audio input/output, or
output
5 T or T1 Tip, audio input/output, or
output
6 T Tip, audio input
7 E-lead Signaling output
8 SG Signaling ground return
Checking FXS VIC Installation
If you installed an FXS VIC, connect a handset to the VIC port. When router power is on, you should be
able to hear the dial tone when you lift the handset. The dial tone should stop after you dial a digit. If
you have trouble, use the show voice port command to make sure that the VIC is installed correctly, or
try connecting a different handset to the VIC.
2-Port ISDN BRI Card
The ISDN BRI NT/TE voice interface card provides a client-side (TE) ISDN S/T physical interface for
connection to an NT1 terminating an ISDN telephone network. It can also be configured to provide a
network termination (NT) interface with phantom power. Each of its two ports can carry two voice calls
(one over each ISDN B channel), for a total of four calls per ISDN BRI card.
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The card is illustrated in Figure 6.
Figure 6 2-Port ISDN BRI Card Front Panel
RJ-45 ports
Installing WAN and Voice Interface Cards
VIC
2B-NT/TE
ISDN BRI S/T 1
Connecting the 2-Port ISDN BRI Card
Use the straight-through RJ-45 cable to connect the 2-port ISDN BRI card to the ISDN network through
a telephone wall outlet.
Caution To prevent damage to the router, be sure to connect the BRI cable to the BRI connector only and not to
any other RJ-45 connector.
Step 1 Confirm that the router is still turned off.
Step 2 Connect one end of a straight-through RJ-45-to-RJ-45 cable to the card’s RJ-45 port. (See Figure 7.)
Figure 7 Connecting the 2-Port ISDN BRI Card
RJ-45 ports
B1
B2
OK
ISDN BRI S/T 0
SEE
MANUAL
BEFORE
INSTALLATION
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VIC
2B-S/T TE
ISDN BRI S/T 1
Straight-through
RJ-45-to-RJ-45 cable
B1
B2
OK
ISDN BRI S/T 0
SEE
MANUAL
BEFORE
INTALLATION
51076
NT1 device
S/T port
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Installing WAN and Voice Interface Cards
Note When the interface is configured as NT and is connecting to a TE device, the cable must have the transmit
and receive pins swapped (crossover cable). (See Tabl e 3.)
Table 3 Interface Pin Numbers and Functions
ISDN BRI NT/TE
Pin 3/T+ Pin 3/R+ Pin 3/T+
Pin 4/R+ Pin 4/R+ Pin 4/R+
Pin 5/R- Pin 5/T- Pin 5/R-
Pin 6/T- Pin 6/R- Pin 6/T-
Step 3 Connect the other end to the RJ-45 wall outlet.
ISDN BRI Card LEDs
ISDN BRI voice interface cards have three LEDs, as listed in Table 4.
Table 4 ISDN BRI Voice Interface Card LEDs
LED Meaning
B1 Call active on B1 channel
B2 Call active on B2 channel
OK Interface is connected to an
NT Interface (use
straight-through cable)
ISDN network
TE Interface (use
crossover cable)
If you have additional cards to install, proceed to the appropriate sections in this manual. When you have
finished all installations, see the Cisco 1751 Router Software Configuration Guide available on the
Documentation CD-ROM.
Determining Voice Port Numbering
Enter the show voice port command to identify the port numbers of voice interfaces installed in your
router:
Router# show voice port slot-number/port
Figure 8 on page 9 shows Cisco 1751 router slot numbering.
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Figure 8 Cisco 1751 Router Slot Numbering
Cisco Router and Security Device Manager
Kensington-compatible
locking socket
WIC/VIC
slot 1
Console port
Model Cisco 1751
IN USE
10/100-Mbps
Ethernet port
SLOT 1
SLOT 0
10/100 ETHERNET
Slot 1
OK LED
VIC
2FXS
Slot 0
OK LED
IN USE
1
SEE MANUAL BEFORE INSTALLATION
WIC/VIC
slot 0
0
FDX/100/LINK LEDs
Figure 9 shows the VIC port numbering.
Figure 9 VIC Port Numbering
VIC port 1 VIC port 0
SLOT 2
CONSOLE
AUX
Auxiliary port
VIC
2FXO
Ground
wire
1
VIC
slot 2
IN USE
SEE MANUAL BEFORE INSTALLATION
PVDM OK MOD OK
PVDM
OK LED
OK LED
MOD
Power switch
IN USE
0
SLOT 2 OKFDXSLOT 0 OKSLOT 1 OK 100 LINK
Slot 2
OK LED
THIS SLOT
ACCEPTS
ONLY VOICE
INTERFACE
CARDS
+5, +12, -12 VDC
Powe r
socket
46560
VIC
E&M
IN USE
1 0
SEE MANUAL BEFORE INSTALLATION
IN USE
10694
Example
If you install a VIC in both SLOT 0 and SLOT 1 of the router, the ports in each of these slots would be
numbered as follows:
SLOT 0—0/0 and 0/1
SLOT 1—1/0 and 1/1
Cisco Router and Security Device Manager
Cisco Router and Security Device Manager (SDM) is a web-based configuration tool that allows
you to configure LAN and WAN interfaces, routing, Network Address Translation (NAT),
firewalls, VPNs, and other features on your router. If SDM is installed on your router, configure
the router by following the instructions in the Cisco Router and Security Device Manager (SDM)
Quick Start Guide. If this document was not shipped with your router, you can obtain SDM and
instructions for installing it on your router from the following
http://www.cisco.com/pcgi-bin/tablebuild.pl/sdm
location:
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Configuring Voice-over-IP
To obtain the SDM release notes, and other SDM documentation, go to http://www.cisco.com/go/sdm
and click the Technical Documentation link.
Note If you need to configure Voice-over-IP, use the Configuring Voice-over-IP section of this Quick Start
Guide.
Configuring Voice-over-IP
Voice-over-IP (VoIP) enables a Cisco 1751 router to carry voice traffic (for example, telephone calls and
faxes) over an IP network, simultaneously with data traffic. (See Figure 10.) This guide describes the
configuration tools and the major configuration tasks to configure the router.
Figure 10 Voice and Data Traffic on an IP Network
Configuration Tools
You can configure VoIP by using one of the following tools:
• Cisco ConfigMaker application
• Cisco IOS command-line interface (CLI)
Cisco ConfigMaker Application
Use the Cisco ConfigMaker application to address and configure one or more devices or to create an
entire network. A series of wizards and dialog boxes can make your voice-configuration task simple and
fast.
Follow these steps to install the Cisco ConfigMaker application on your PC:
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Step 1 Disable any virus-scanning software you have running.
Step 2 Close all programs active on your PC.
Step 3 Insert the CD into your CD-ROM drive.
Step 4 The Cisco ConfigMaker installer starts automatically.
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If the installer does not start after a few seconds, select Start>Run, and enter d:\setup where d is your
CD-ROM drive.
Step 5 Follow the instructions on the screen to install the Cisco ConfigMaker application.
To learn about the Cisco ConfigMaker application, view the online movie, or use Cisco ConfigMaker
Help Topics from the help menu.
You need administrative privileges to install the Cisco ConfigMaker application on Windows NT.
Cisco IOS Command-Line Interface
To configure your router from the command-line interface (CLI), refer to this guide, the Cisco 1700
Series Software Configuration Guide, or the Cisco 1751 Router Software Configuration Guide available
on the Documentation CD-ROM.
Major Voice over IP Configuration Tasks
Follow these major steps to configure Voice over IP (VoIP) on your router:
Configuring Voice-over-IP
Step 1 Configure your IP network to support real-time voice traffic. Before you move to the next step, ping the
remote router to make sure you have an IP connection.
Step 2 Configure your router to support voice ports. Follow these steps for your specific requirements:
• Foreign exchange station (FXS) and foreign exchange office (FXO) voice ports
The default voice-port values are usually adequate for both FXS and FXO voice ports. However, if
you need to change the default values, refer to the Cisco 1751 Router Software Configuration Guide.
• E&M voice port
The default values for an E&M voice port are not sufficient to enable voice and data transmission
over the IP network. E&M values must match those of the connected PBX device. Refer to the
“Connecting the FXS, FXO, and E&M VICs to the Network” section on page 4.
• ISDN BRI port
The default values for a basic rate interface (BRI) port are not sufficient to enable voice and data
transmission over the IP network. BRI values must match those of the connected PBX device. Refer
to the “Connecting the FXS, FXO, and E&M VICs to the Network” section on page 4.
Step 3 Enter configuration mode to configure your router for VoIP traffic. Refer to the “Configuring
Voice-over-IP” section on page 10.
Step 4 Save the configuration. Refer to the “Saving the Configuration” section on page 13.
Step 5 Establish a dial plan to determine how the call can be routed. Use the dial-peer voice command to define
dial peers and to implement the dial plan. Refer to the “Dial Plan” section on page 14.
Step 6 Fine-tune your network to adequately support VoIP by configuring a series of protocols and features for
quality of service (QoS). Refer to the “Tuning Parameters for Real-Time Voice Traffic” section on
page 25.
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