atcomsystems.ca/forum Forums TDM Business Telephone Systems Avaya - Lucent Telephones & Systems Avaya J179 Phones Powering up in Discover Mode with an IP Address

If repurposed, is there a DHCP scope on the network, grabbing them and pointing them to something?
Make sure the system is set up for SIP, and be on current 11 or 11.1 firmware.
Look here to set up SIP on IPO. https://ipofficeassistance.com/install-sip-phones-on-ip-office/