
Analog and ISDN Basic Rate Voice Network Modules continued
Product
Description
Supported Platforms
and Minimum Cisco
IOS Versions
Comments
EM-HDA-3FXS/4FXO
Three-port FXS and
Four-port FXO Voice and
Fax Expansion Modules
Provides on-premises
FXS signaling to connect
directly to a standard
telephone, fax machine, or
similar device and supplies
ring, voltage, and dial tone
In addition, the FXO ports
provide off-premises
connection to the central
ofce Use with the Cisco
High-Density Extension
Module (EVM-HD-8FXS/
DID) baseboard
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
28 51–12 3 (8)T4
28 21–12 3 (8)T4
Requires a Cisco
high-density analog and
digital extension module
(EVM-HD-8FXS/DID)
Requires voice feature set
EM-HDA-6FXO
Six-port FXO Voice and Fax
Expansion Module
Provides off-premises
connection to the central
ofce This module
supports FXO power
failover If power to the
router fails, this feature
helps enable a direct
metallic path between an
FXO port and a special
“red” telephone to provide
a direct line to the PSTN
Use with the Cisco
High-Density Extension
Module (EVM-HD-8FXS/
DID) baseboard
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
28 51–12 3 (8)T4
28 21–12 3 (8)T4
Requires a Cisco
high-density analog and
digital extension module
(EVM-HD-8FXS/DID)
Requires voice feature set
Cisco Voice Network Modules
T1/E1 Digital Voice Network Modules
Product
Description
Supported Platforms
and Minimum Cisco
IOS Versions
Comments
EM-HDA-4FXO
Four-port Voice/Fax
Expansion Module – FXO
Provides four off-premise
analog connections to
the central ofce Country
settings are congurable
Includes support for
battery polarity reversal
detection and Caller ID
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and
28 51–12 3 (8)T4
Requires Cisco IP voice
feature set and higher
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
EM-HDA-8FXS
Eight-port Voice/Fax
Expansion Module – FXS
Provides an additional eight
FXS ports for connections
directly to analog phones,
fax machines, and key
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and
28 51–12 3 (8)T4
123 Mainline and forward
supported in IP Voice
feature set
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
or a Cisco high-density
analog and digital
extension module
(EVM-HD-8FXS/DID)
DSP-HDA-16
16-channel DSP Module for
NM-HDA
Enables an additional eight
high-complexity or 16
medium-complexity voice
calls on NM-HDA
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and
28 51–12 3 (8)T4
123 Mainline and forward
supported in IP Voice
feature set
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
EM2-HDA-4FXO
Four-port Voice/Fax
Expansion Module – FXO
Provides four off-premise
analog connections to
the central ofce Country
settings are congurable
Includes support for
battery polarity reversal
detection and Caller
ID Compared to the
EM-HDA-4FXO, this module
delivers longer loop length
support and improved
performance against poor
line conditions when used
in GroundStart signaling
mode
Modular Router Solutions
Voice and Fax Integration
3800 Series–123(14)T
2811, 2821, and
28 51–12 3 (14)T
Requires Cisco IP voice
feature set and higher
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
Cisco Voice Network Modules
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