https://www.cisco.com/c/en/us/products/unified-communications/small-business-voice-gateways-ata/eos-eol-notice-listing.html
Cisco Small Business Voice Gateways and ATAs - End-of-Life and End-of-Sale Notices - Cisco
End-of-Life and End-of-Sale Notices
cisco small businessgateways and atasend of life