2fxo vic
Cisco - Understanding Foreign Exchange Office (FXO) Voice Interface Cards
Understanding Foreign Exchange Office (FXO) Voice Interface Cards
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Document ID: 12444
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Contents
Introduction
Prerequisites
Requirements
Components Used
Conventions
Product Numbers
Features
Configuration
Platform Support
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Introduction
The Cisco Foreign Exchange Office (FXO) interface is an RJ-11 connector that allows an analog connection to be directed at the public switched telephone network's (PSTN's)
central office or to a station interface on a private branch exchange (PBX). The FXO sits on the switch end of the connection. It plugs directly into the line side of the switch so
the switch thinks the FXO interface is a telephone.
( 2 5 6 ch a r a cter li m i t)
Send
Note: The FXO Voice Interface Card (VIC) is not the same as a Foreign Exchange Station (FXS) card and therefore does not provide dial tone. Do not plug a telephone set to
the FXO VIC.
Prerequisites
Requirements
There are no specific requirements for this document.
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Cisco - Understanding Foreign Exchange Office (FXO) Voice Interface Cards
Page 2 of 7
Components Used
This document is not restricted to specific software and hardware versions.
Conventions
Refer to Cisco Technical Tips Conventions for more information on document conventions.
Product Numbers
Product
Number
VIC-2FXO
Description
Two-port FXO VIC
VIC-2FXO-EU Two-port FXO for Europe
VIC-2FXO-M1 Two-port FXO for U.S. with battery reversal
VIC-2FXO-M2 Two-port FXO for Europe with battery reversal
VIC-2FXO-M3 Two-port FXO for Australia
VIC-4FXO-M1 Four-port FXO for U.S. with battery reversal only for the MRP
VIC2-2FXO
Two-port VIC – FXO (Universal). Also supports Centralized Automatic Message Accounting (CAMA)
with software configuration
VIC2-4FXO
Four-port VIC – FXO (Universal). Also supports CAMA with software configuration
MRP38FXOM1
Eight-port FXO M1 card for the MRP
Features
Product
Number
Voice Ports
Description
Two, four, or eight FXO ports
Connects to a telco line or to a PBX or key set that emulates a telco line. Uses RJ-11 connectors.
Connections
Note: The end to end connection between the CO RJ11 jack and the router voice-port must be a straightthrough 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 may be used since the resulting connection is straight.
However, sometimes the CO may not reverse the pinouts and therefore a straight RJ11 cable is needed.
Defintions:
Pinouts for Rolled RJ11 Cable => TIP to RING, RING to TIP
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Cisco - Understanding Foreign Exchange Office (FXO) Voice Interface Cards
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Pinouts for Straight RJ11 Cable=> TIp to TIP, RING to RING
Also note FXO ground-start services are polarity-sensitive and undesirable behavior, such as failed calls,
will occur if proper polarity conventions are not observed.
Cisco IOS®
Software Feature Requires a Plus feature set.
Set
Caller ID
Requires VIC-2FXO-M1, VIC-2FXO-M2, VIC-4FXO-M1, VIC2-2FXO, VIC2-4FXO, or MRP38FXOM1
Battery Reversal
Requires VIC-2FXO-M1, VIC-2FXO-M2, VIC-4FXO-M1, VIC2-2FXO, VIC2-4FXO, or MRP38FXOM1
Ground Start
Requires VIC-2FXO, VIC-2FXO-M1, VIC-2FXO-M3, VIC-4FXO-M1, VIC2- 2FXO, VIC2-4FXO, or
MRP3-8FXOM1
Loop Start
Supported on all cards.
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 VoIP on Cisco routers are very similar on all of the router platforms shown below.
For configuration of voice features in Catalyst OS (CatOS) on a Catalyst 4000, see Configuring Voice Interfaces.
Platform Support
The following table shows which platforms support the various FXO VICs including Cisco IOS Software release support selection.
Note: The original VIC only works in NM-1V and NM-2V network modules, and VIC2 only works in NM-HD-1V, NM-HD-2V, and NM-HD-2VE. These are not interchangeable.
Cisco
IOS
Software
Support
1750
2
1751
2
1760
2
VG200
2600,
3620
2600XM, 2691,
3725, 3745
3640
2811 4,
2821 4,
2851 4
3, 3660 3
1
Carrier
Not
Not
Not
NM-1V,
Module Required Required Required NM-2V
NM-1V,
NM-2V
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NM-1V,
NM-2V
NM-HD1V, NMHD-2V,
NM-HD2VE
NMHDV2
NM-1V,
NM-2V
NM-HD1V, NMHD-2V,
NM-HD2VE
NMHDV2
3825 4,
3845 4
MRP IAD2431, Catalyst
ICS7750 IAD2432
4000
NM-HD- NM-HD1V, NM- 1V, NMHD-2V, HD-2V,
Not
Not
NM-HD- NM-HDRequired Required
2VE,
2VE,
NMNMHDV2
HDV2
WSX4604
AGM
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Cisco - Understanding Foreign Exchange Office (FXO) Voice Interface Cards
VIC2FXO
VIC2FXOEU
All
Versions
All
Versions
All
Versions
All
Versions
All
Versions
All
Versions
12.1(3)T
All
Versions
All
Versions
Page 4 of 7
Not
Not
All
Supported Supported Versions
Not
Not
Not
Not
12.2(1)
Supported Supported Supported Supported XD
12.2(1)
XD
12.1(3a)
XI
12.1(3)T
11.3(6)T,
12.0(2),
12.0(2)T,
12.0XK, All
Versions
12.1,
12.1T,
12.2,
12.2T,
11.3(6)T,
12.0(2),
12.0(2)T,
Not
Not
Not
Not
Not
12.2(1)
12.0XK, Not
Supported Supported 12.1,
Supported Supported Supported Supported XD
12.1T,
12.2,
12.2T,
12.2(1)
XD
12.1(3a)
XI
12.1(3)T
12.0(7)
XK, 12.1
All
(2)T,
Versions
12.2,
12.2T
12.0(7)
XK, 12.1
Not
Not
Not
Not
Not
Not
12.2(1)
(2)T,
Supported Supported
Supported Supported Supported Supported XD
12.2,
12.2T
12.2(1)
XD
Not
Supported
12.1(3)T
12.0(7)
XK, 12.1
All
(2)T,
Versions
12.2,
12.2T
12.0(7)
XK, 12.1
Not
Not
Not
Not
Not
Not
12.2(1)
(2)T,
Supported Supported
Supported Supported Supported Supported XD
12.2,
12.2T
12.2(1)
XD
Not
Supported
VIC2FXOM1
12.2(2)XJ 12.2(2)XJ
VIC2FXOM2
All
12.2(2)XJ 12.2(2)XJ
Versions
VIC4FXOM1
12.2(8)
12.2(8)
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
YN, 12.2 YN, 12.2
Supported Supported Supported Supported Supported Supported Supported Supported Supported Supported Supported Supported Supported
Supported
(15)ZL
(15)ZL
All
Versions
11.3(6)T,
12.0(2),
12.0(2)T,
12.0XK, All
Versions
12.1,
12.1T,
12.2,
12.2T,
11.3(6)T,
12.0(2),
12.0(2)T,
Not
Not
Not
Not
Not
12.2(1)
12.0XK, Not
Supported Supported 12.1,
Supported Supported Supported Supported XD
12.1T,
12.2,
12.2T,
VIC2FXOM3
12.1(5)T, 12.1(5)T,
All
12.2,
12.2,
Versions
12.2T
12.2T
VIC22FXO
12.2(15)
ZL, 12.3
Not
(4)T, 12.3
Supported
(4)XG,
12.3(5)
12.2(15)
12.2(15)
ZL, 12.3
Not
Not
Not
ZJ, 12.3
(4)T, 12.3
Supported Supported Supported
(4)T
(4)XG,
12.3(5)
12.3(7)T
12.2(15)
Not
ZJ, 12.3
Supported
(4)T
VIC24FXO
12.2(15)
ZL, 12.3
Not
(4)T, 12.3
Supported
(4)XG,
12.3(5)
12.2(15)
ZL, 12.3
12.2(15)
Not
Not
(4)T, 12.3 Not
ZJ, 12.3
Supported Supported Supported
(4)
(4)T
XG,12.3
(5
12.3(7)T
12.3(7)T
12.1(3)T
12.2(1)
XD
Not
Supported
12.3(7)T
12.3(8)T4 12.3(11)T
Not
Not
Not
Supported Supported Supported
Not
12.3(7)T
Supported
12.3(8)T4 12.3(11)T
12.2(15)
ZL
12.2(15)
ZL
Not
Supported
12.2(8)
MRP3Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
Not
8FXOM1 Supported Supported Supported Supported Supported Supported Supported Supported Not
Supported Supported YN and
Supported Supported Supported
12.2(15)
12.2(8)
YN and
12.2(15)
Not
Supported
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Cisco - Understanding Foreign Exchange Office (FXO) Voice Interface Cards
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Not
Not
Not
ZL
ZL
1 Voice
features require a PLUS image in the Cisco IOS Software classic feature-sets, or an appropriate selection from the list of the Cisco IOS Software cross-platform feature-sets. For more information, refer
to Product Bulletin No. 2089: Cisco IOS 12.3 Mainline and 12.3T Feature Sets for Cisco 2691 for additional information.
2 On
the 1700 voice platforms, one or more PVDMs are needed to support VICs, or voice ports are missed in the active configuration. The PVDMs hold DSPs that make the VICs fully functional, and are
installed on the motherboard of the 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
4 The
is not supported on the Cisco 3631 series router.
Cisco 2811, 2821, 2851, 3825, and 3845 voice routers do not support the NM-1V and NM-2V voice/fax network modules.
Certain FXO VICs include two jumper headers, W3 and W4, to set loop-start or ground-start mode (see the Features table). One jumper configures each FXO port. The default setting, which should be
satisfactory in most installations, is loop start. In this setting, jumpers are placed over positions 2 and 3 of headers W3 and W4. Most modern central office equipment, such as DMS-100 and 5ESS switches,
provides calling party control (CPC) and Ring on Seize on loop-start lines. CPC allows quicker disconnection, and Ring on Seize minimizes glare (collision of inbound and outbound calls on the same interface).
If your central office does not provide these features on loop start, you may want to configure the FXO card for ground-start operation instead by moving the jumpers to positions 1 and 2. For proper operation,
both jumpers must be configured identically. In most cases, jumper setting should have little or no effect on operation.
The FXO interface configured for GroundStart is polarity sensitive. If you see a 0x22 disconnect cause code from the output of the debug debug voip ccapi inout command, you may have the telco ground
connected to the FXO ground on the router. This can be caused by an incorrect RJ-11 cable between the FXO port and the telco jack. If you are using a straight through cable try using a crossover, or if you are
using a crossover try using a straight through.
The Cisco IOS Software versions provided are typically the minimum version required to support the platform, module or feature in question. To find out 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) only tool.
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Updated: Feb 07, 2006
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Document ID: 12444
2/8/2006
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