Cisco 8-port FXS/DID Voice and Fax Expansion Module - 8 x RJ-11 FXS/DID, 1 x RJ-21

The 8-port FXS/DID voice and fax expansion module has 8 FXS and DID ports, individually configurable for FXS or DID signaling. There is no requirement for signaling type pairing of adjacent ports for this module. The FXS interface connect directly to a standard telephone, fax machine or similar device and supplies ring, voltage, and dial tone.