On the Versatility each Group has its own voice mailbox and each extension has its own voice mailbox.
Every extension in the group can check the group mailbox.
Example of the BT Versatility -
Lets say 'ISDN 1' is set to go to 'Group 10' . If no one in the group is available or the call goes unanswered then that call will go to the Group 10 voice mailbox, every extension in that group can then check that voice mailbox (they also get a message indication on the handset)
If each extension has a DDI number, then those calls if unanswered/busy will go to the extension voice mailbox, that extension can then check its own voice mail (the extension will also get a message indication on the handset)
Only reason I asked about SARK commercial version is in the datasheet it says "Group mailboxes" so I wondered if this was an extra feature it had over SAIL.
Regards,
Del.