Cisco VIC-2FXS, VIC2-2FXS, VIC-2DID, VIC-4FXS/DID Quick Start Manual

Understanding FXS Voice
Interface Cards

Contents

Introduction
Prerequisites

Requirements
Components Used
Conventions

Product Numbers
Features
Configuration
Platform Support
Pinout Information
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Related Information

Introduction

A Foreign Exchange Station (FXS) interface connects directly to a standard
telephone, fax machine, or similar device and supplies ring, voltage, and
dial tone. The Cisco FXS interface is an RJ-11 connector that allows
connections to basic telephone service equipment, keysets, and private
branch exchanges (PBXes).

For more information and troubleshooting, refer to the TAC Case Collection (

registered customers only

)

tool.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

TAC Notice:

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Changing on TAC Web

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This document is not restricted to specific software and hardware versions.

The information presented in this document was created from devices in a specific lab environment.
All of the devices used in this document started with a cleared (default) configuration. If your
network is live, make sure that you understand the potential impact of any command before you use
it.

Conventions

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Product Numbers

Foreign eXchange Station = FXS

Direct Inward Dial = DID

Voice Interface Card = VIC

Note:

VIC2 indicates a new generation.

Features

Interface

Card

Description

VIC-2FXS Two port FXS VIC
VIC2-2FXS Two port FXS VIC

VIC-2DID

Two port DID/FXS Dual Function VIC.
DID mode is default operating mode.

VIC­4FXS/DID

Four port FXS/DID Dual Function VIC.
FXS mode is default operating mode.

Feature Description

Voice Ports Two or Four FXS ports

Connections

Connects to a telephone or fax, or to a
PBX or key set that emulates a telephone.
Uses RJ-11 connectors.

Note:

The end-to-end connection between
the CO RJ11 jack and the router voice-port
must be a straight-through connection.
This means that TIP goes to TIP and RING
to RING. Normally the CO provides an
interface for which a standard rolled RJ11
cable can be used since the connection that
results is straight. However, sometimes the
CO cannot reverse the pinouts and
therefore, a straight RJ11 cable is needed.

Configuration

For configuration of Voice features in Cisco IOS Software, refer to Voice over IP for the Cisco 3600

Series.

Note:

In Cisco IOS Software, issue the

voice-port

<slot>/<VIC slot>/<unit>

global configuration

command to configure the voice port parameters.

The commands to configure Voice over IP (VoIP) on Cisco routers are very similar on all of the
router platforms shown here.

For configuration of voice features in Catalyst OS (CatOS) on a Catalyst 4000, refer to Configuring

Voice Interfaces.

Platform Support

Note:

The table that follows has been split due to spatial concerns.

Defintions:

z

Pinouts for Rolled RJ11 Cable =>
TIP to RING, RING to TIP

z

Pinouts for Straight RJ11 Cable=>
TIP to TIP, RING to RING

Note:

FXS ground-start services are
polarity-sensitive and undesirable
behavior, such as failed calls, can occur if
proper polarity conventions are not
observed.

Cisco IOS®
Software
Feature Set

Requires a "Plus" or “IPVOICE” feature
set.

Cisco IOS

Software

Support

1

17502

17512,

1760

2

VG200

2600,

3620

2600XM

Carrier
Module

Not

Required

Not

Required

NM-1V
NM-2V

NM-1V
NM-2V

NM-1V
NM-2V

NM-HD­1V, NM­HD-2V,
NM-HD­2VE

NM­HDV2

VIC-2FXS

All
versions

All
Versions

12.1(3)T,

12.1(3)T

All
Versions

All
Versions

Not
Supported

Not
Supported

VIC2-

2FXS

Not
Supported

12.2(15)
ZL, 12.3
(4)T,

12.3(4)

Not
Supported

Not
Supported

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

12.3(7)T