Fixed Port High Density Analog Voice ServiceModule for ISR4K

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Product Description Cisco SM-X-72FXS Service Module - expansion module - FXS x 72
Device Type Expansion module
Form Factor Plug-in module
Ports FXS x 72
Dimensions (WxDxH) 15.6 in x 7.8 in x 1.6 in
Weight 4.94 lbs
Network / Transport Protocol DHCP, DNS, RTP, RTCP
Compliant Standards G.711, G.729a, G.726
Designed For Cisco 4451-X, 4451-X Application Experience, 4451-X Integrated Services Router, 4451-X Integrated Services Router Security Bundle, 4451-X Integrated Services Router Voice and Video Bundle, 4451-X Integrated Services Router Voice Security Bundle; Integrated Services Router 4351