Panasonic KX-TD308 Installation Manual page 228

V
Features
Outside Call
DIL l:l, DISA
System
Extension
Chain
1.2 Intercept Routing to VM
If an outside line is set as Intercept Routing - No Answer
(IRNA) whose destination is the VPS, an outside call is
forwarded to the VPS under the proper conditions. The
system sends to the VPS a mailbox number of the
corresponding extension at that time. Therefore the calling
party can leave his / her message in the mailbox of the
desired extension without knowing the mailbox number.
Extension
VM Hunting ,
3-168 Features