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- Cisco Hgih-Density Analog and Digital Extension Module for Voice and Fax (EM-HDA-6FXO=)
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Cisco Six-port FXO voice/fax expansion module
The Cisco High-Density Analog and Digital Extension Module for Voice and Fax consists of a baseboard and up to two optional expansion modules. Customers may select 0, 1, or 2 expansion modules, which simply plug into the extension module baseboard to increase the voice and fax session capacity of the extension module-up to a maximum of 24 total voice and fax ports.