V-Tech DT-IP Technical Guide - Manual (Page 61)

If you don’t want to use the Default setting, deselect the Use Project Default item, and then
edit the private calling diverting order for the corresponding DT-IPC. Press write To Device
button to download the info to the corresponding DT-IPC.
Click the Download All button to download Button Call Table, IP Call Table and Call Priority
at one time.
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IP-2 wire system technical guide