Cisco 8-port FXS analog voice/fax expansion module voice network module

8-port FXS analog voice/fax expansion module This 8-port FXS voice and fax expansion module provides on-premises FXS signaling to connect directly to a standard telephone, fax machine, or similar device and supplies ring, voltage, and dial tone. Signaling support available in FXS mode includes loop-start and ground-start. Only FXS signaling is supported-there is no DID support. This expansion module also works with the Cisco High-Density Analog Voice and Fax Network Module (part number NM-HDA-4FXS).