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UCM6102 IP PBX
When done click Save then Apply Changes from above.
By clicking on Auto Discover, the PBX can automatically discover the device using
a specific Scan Method of Ping, ARP, or SIP-Message. Once that is selected the
Scan IP field can be filled to scan the entire network segment by entering 255.
When done click Save and a message will be presented prompting to check
the result.