Cisco 7-Port Voice/Fax Expansion ModuleExpand your Cisco voice network with a robust 7 Port Voice Fax Expansion Module that blends on premises analog connectivity with reliable central office links. The module features 3 FXS ports for direct connection to telephones, fax machines, or similar devices, delivering ring voltage and dial tone right at your fingertips. Complementing these, 4 FXO ports provide off premises connections to your carrier or PBX, enabling flexible inbound and outbound