Panasonic KX-TDA15 Features Manual page 366

2.2 System Configuration—Software
5.
VM Group
There are two types of VM groups as follows:
VM (DTMF) Group
VM (DPT) Group
(→ 1.20.1 Voice Mail (VM) Group)
→ 3.9.16 [3-7-1] VM(DPT) Group—System Settings
→ 3.9.17 [3-7-2] VM(DPT) Group—Unit Settings
→ 3.9.19 [3-8-1] VM(DTMF) Group—System Settings
→ 3.9.20 [3-8-2] VM(DTMF) Group—Group Settings
→ 3.9.21 [3-8-2] VM(DTMF) Group—Group Settings—Member List
→ [660] VM Group Floating Extension Number
[Example]
DPT
Port
366 Feature Guide
Type
A group of SLT ports which use the Voice Mail DTMF Integration
features.
One SLT port can belong to only one group.
A group of DPT ports which use the Voice Mail DPT (Digital)
Integration features.
One DPT port can belong to only one group.
SLT DPT DPT
Port
Port Port
VM (DPT) Group
VPS
(DPT [Digital] Integration)
Description
PBX
DPT DPT SLT
Port Port Port
SLT SLT SLT
Port Port Port
VM (DTMF) Group
VPS
(DTMF Integration)