144
145
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
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and 2851–
123(8)T4
Requires Cisco IP voice
feature set and higher
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
Eight-port Voice/Fax
Expansion Module – FXS
Provides an additional
eight FXS ports for
connections directly
to analog phones, fax
machines, and key
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and 2851–
123(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)
16-channel DSP Module
for NM-HDA
Enables an additional eight
high-complexity or 16
medium-complexity voice
calls on NM-HDA
Voice and Fax Integration
3800 Series–123(11)T
2811, 2821, and 2851–
123(8)T4
123 Mainline and forward
supported in IP Voice
feature set
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
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
Voice and Fax Integration
3800 Series–123(14)T
2811, 2821, and 2851–
123(14)T
Requires Cisco IP voice
feature set and higher
Requires a high-density
analog voice/fax network
module (NM-HDA-4FXS)
Cisco Network Modules
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
Voice and Fax Integration
3800 Series–123(11)T
2851–123(8)T4
2821–123(8)T4
Requires a Cisco high-
density analog and digital
extension module
(EVM-HD-8FXS/DID)
Requires voice feature set
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
Voice and Fax Integration
3800 Series–123(11)T
2851–123(8)T4
2821–123(8)T4
Requires a Cisco high-
density analog and digital
extension module
(EVM-HD-8FXS/DID)
Requires voice feature set
Cisco Network Modules