The voice/fax modules enable packet voice technologies including voice over IP (VoIP), voice over Frame Relay (VoFR) and voice over ATM (VoATM). Cisco voice solutions provide the means for integrating both voice and data within a single network allowing users to take advantage of services, such as toll-bypass, without sacrificing voice quality. Cisco offers this four-port FXO voice/fax expansion module for High-Density Analog Voice and Fax Network Module with four FXS ports (NM-HDA-4FXS).
Features
Type: Voice/fax module, expansion slot
Enclosure Type: Plug-in module
Features: Auto call detection, automatic data/fax detection
Warranty: 90 Days Limited
Cisco 4-Port High-Density Analog Voice/Fax Network Module Specifications
Part # EM-HDA-4FXO=
Product Description
Cisco voice/fax module
Device Type
Voic /fax module, expansion slot
Enclosure Type
Plug-in module
Protocols & Specifications
ITU-T T.30
Data Compression Protocol
G.729, G.711, G.723.1, G.728, G.726, G.729.A
Voice Communication Support
VoIP
Manufacturer Warranty
90 Days Warranty
Cisco 4-Port High-Density Analog Voice/Fax Network Module Video
1.800.814.5410 
858.764.8900 Mon-Fri 6AM-4PM PT
