Panasonic KX-NS1000 - 4.2.3.2 Automatic Rerouting to Secondary PBX

Programming Manual References
9.13 PBX Configuration—[1-1] Configuration—Slot—V-IPGW16—Port Property— Call Distribution Port
Group
Feature Manual References
4.1.2 Call Distribution Port Group
352 PC Programming Manual Document Version 2016-03
9.12.2 PBX Configuration—[1-1] Configuration—Slot—Shelf Property - Virtual IP Gateway—Hunt Pattern