IPC Subgroup
H04M 3/533 Voice mail systems
Introduced: January 2000
Last revised: January 2006
Full Title
Automatic or semi-automatic exchanges > Systems providing special services or facilities to subscribers > Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers > Centralised arrangements for recording incoming messages > Voice mail systems
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION