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
NetPro Discussion Forums - Featured Conversations
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

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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

XG,

12.3(5)

VIC-2DID4

Not
Supported

12.2(2)
X*, 12.2
(4)X*,

12.2(4)
Y*, 12.2
(8)Y*,

12.2(11)
Y*, 12.2
(13)T,

12.2(13)
Z*, 12.2
(15)Z*

12.1(5)
XM1,

12.2(2)T,

12.2(2)
XT, 12.3
(1)

12.1(5)
XM1,

12.2(2)T,

12.2(2)
XT, 12.2
(11)YT,

12.3(1)

All
Versions

12.2(15)
ZJ, 12.3
(4)T

12.3(7)T

VIC-

4FXS/DID5

Not
Supported

12.2(15)
ZL, 12.2
(8)YN,

12.3(2)
T, 12.3
(4)XG,

12.3(5)

Not
Supported

Not
Supported

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

12.3(7)T

Cisco IOS

Software

Support 1

36403

36603

2691, 3700

IAD

2

IAD

Carrier
Module

NM-1V
NM-2V

NM-HD­1V, NM­HD-2V,
NM-HD­2VE

NM-1V
NM-2V

NM-HD­1V, NM­HD-2V,
NM-HD­2VE

NM-1V
NM-2V

NM-HD­1V, NM­HD-2V,
NM-HD­2VE

NM­HDV2

Not
Req

u

VIC-2FXS

11.3(1)T,
all 12.x

Not
Supported

All
Versions

Not
Supported

All
Versions

Not
Supported

Not
Supported

Not
Sup

p

VIC2-

2FXS

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

12.3(7)T

12.3

(

XD,
(7)T

VIC-2DID4

12.1(5)
XM1,

12.2(2)T,

12.2(2)
XT, 12.2
(11)YT,

12.3(1),

12.3(2)T

12.2(15)
ZJ, 12.3
(4)T

12.1(5)
XM1,

12.2(2)T,

12.2(2)
XT, 12.2
(11)YT,

12.3(1),

12.3(2)T

12.2(15)
ZJ, 12.3
(4)T

All
Versions

12.2(15)
ZJ, 12.3
(4)T

12.3(7)T

Not
Sup

p

1

Voice requires a Cisco IOS Software Voice feature set on Cisco 1700 series routers, and a Cisco

IOS Software Plus feature set on the Cisco 2600, 3600, and 3700 series routers.

2

On the Cisco 1700 voice platforms, one or more packet voice and data modules (PVDMs) are
needed to support Voice interface card (VICs,) or voice ports may be missing in the active
configuration. The PVDMs hold digital signal processors (DSPs) that make the VICs fully
functional, and are installed on the motherboard of the Cisco 1700 series. For more information,
refer to Troubleshooting Unrecognized Voice Interface Cards on Cisco 1750, 1751, and 1760

Routers. On the Cisco VG200, 2600, 2600XM, 2691, 3600, and 3700 series routers, the carrier

network modules (NM-1V, NM-2V, NM-HD-1V, NM-HD-2V, NM-HD-2VE, NM-HDV2) come
with the DSPs installed on the module.

3

Voice is not supported on Cisco 3631 series router.

4

The VIC-2DID card can operate in both DID (default setting) and FXS modes on the Cisco 1751
and 1760, and when installed in the NM-1V and NM-2V on other voice platforms. When installed in
a NM-HD-1V, NM-HD-2V, NM-HD-2VE, and NM-HDV2, the VIC-2DID card only operates in
DID mode until the IOS 12.4(3) release when both DID and FXS modes are supported.

5

The VIC-4FXS/DID card can operate in both FXS (default setting) and DID modes on the Cisco
1751 and 1760. On other voice platforms the VIC-4FXS/DID card only operates in FXS mode when
installed in a NM-HD-1V, NM-HD-2V, NM-HD-2VE, and NM-HDV2 until the IOS 12.3(14)T
release where both modes of operation are available.

1

Voice requires a minimum of a Cisco IOS Software IPVOICE feature set on the Cisco Integrated
Services Router (ISR) platforms.

VIC-

4FXS/DID5

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

Not
Supported

12.2(15)
ZJ, 12.3
(4)T

12.3(7)T

12.3

(

XD,
(7)T

Cisco IOS

Software
Support

1

28012

2811, 2821, 28512

3825, 3845

2

Carrier
Module

Not
Required

Chassis
Slot

NM-1V
NM

-2V

NM-HD­1V, NM­HD-2V,
NM-HD­2VE

NM­HDV2

Chassis
Slot

NM-1V
NM

-2V

NM-

H

1V,

N

HD-

2

NM-

H

2VE

VIC-2FXS

Not
Supported

Not
Supported

Not
Supported

Not
Supported

Not
Supported

Not
Supported

Not
Supported

Not
Sup

p

VIC2-

2FXS

12.3(8)T4 12.3(8)T4

Not
Supported

12.3(8)T4 12.3(8)T4 12.3(11)T

Not
Supported

12.3

(

VIC-2DID3

12.3(8)T4 12.3(8)T4

Not
Supported

12.3(8)T4 12.3(8)T4 12.3(11)T

Not
Supported

12.3

(

VIC-

4FXS/DID4

12.3(8)T4 12.3(8)T4

Not
Supported

12.3(8)T4 12.3(8)T4 12.3(11)T

Not
Supported

12.3

(

2

On the Cisco 2801, 2811, 2821, 2851, 3825, and 3845 voice platforms, one or more PVDM2 DSP
cards are needed to support VIC and VWICs if they are installed on the chasis WIC slots, or voice

p

orts may be missing in the running configuration. The PVDM2 DSP cards hold DSPs that make the
VICs fully functional, and are installed on the motherboard of these ISR platforms. If VICs and
VWICs are installed in a Network Module, the Module itself must have some DSPs.

3

The VIC-2DID card can operate in both DID (default setting) and FXS modes on the Cisco 2801.
DID mode is supported from IOS 12.3(8)T4 onwards, while FXS mode is supported in IOS 12.3(11)
T onwards. On other ISR platforms, the VIC-2DID card only operates in DID mode until the IOS

12.4(3) release where both DID and FXS modes are supported.

4

The VIC-4FXS/DID card can operate in both FXS (default setting) and DID modes on the Cisco

2801. On other ISR platforms, the VIC-4FXS/DID card only operates in FXS mode until the IOS

12.3(14)T release where both modes of operation are available for the VIC-4FXS/DID card on the
Cisco 2811, 2821, 2851, 3825, and 3845 ISR platforms.

Pinout Information

Port zero on the VIC-2FXS card is designed to accommodate a United States style two-line phone,
instead of the usual European style one-line phone.

This means that in addition to pins three and four in use, pins two and five are also monitored. In
some handsets it is possible that pins two and five are wired up to allow last-number recall or call­forwarding. If this is the case, port zero on the VIC assumes you have a two-line phone, and port 1 is
shutdown.

In order to check this, use only two wires in the cable from the VIC to the phone and verify that port
1 becomes active again.

z

Pin 1—No Connection

z

Pin 2—line two tip

z

Pin 3—line—one ring

z

Pin 4—line—one tip

z

Pin 5—line—two ring

z

Pin 6—line—No Connection

Note:

The Cisco IOS Software versions provided are typically the minimum version required to
support the platform, module, or feature in question. In order to find a complete list of Cisco IOS
Software versions a feature, module, interface card, or chassis is supported in, use the Software

Advisor (

registered customers only

) tool.

NetPro Discussion Forums - Featured Conversations

N

etworking Professionals Connection is a forum for networking professionals to share questions,
suggestions, and information about networking solutions, products, and technologies. The featured
links are some of the most recent conversations available in this technology.

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Voice Hardware Compatibility Matrix for Cisco 1750, 2600, 3600 and VG200 Routers
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