Hybrid PBX
There are 3 products.

Hybrid PAX Provides Simple Setup for Offices
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Panasonic Hybrid PABX System
PanasonicHybrid systemUp to 8 CO lines Up to 24 extensionsDirect Inward System Access (DISA) with message -
Panasonic Hybrid-IP PBX System...
Panasonic Hybrid-IP PBX System 7 extension ports 7 trunk ports -
Panasonic Hybrid-IP PBX System
Panasonic7 extension ports 7 trunk ports