Panasonic KX-NS1000 - 4.3.1.3 TIE Line Programming

Reference
For more information about UM Group Failover, refer to
"4.2.3.3 UM Group Failover" in the Feature Guide.
For information about programming UM Group Failover, refer to "11.7.2 PBX Configuration—[3-7-2]
Group—UM Group—Unit Settings" in the PC Programming Manual.
368 Installation Manual
8.4.2 One-look Networking Survivability