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Set Up VM Blast

VM Blast (Voicemail Blasting) drops a voicemail message into multiple mailboxes at once — one recording, many targets. Use for company-wide announcements that should be heard but don't require live participation.

Before You Start

  • The recipient extensions exist and have voicemail enabled.
  • You have the message ready to record (or a System Recording prepared).

Steps

Create a VM Blast group

  1. Go to Group Attributes → Voicemail Blasting.
  2. Click + Add VM Blast Group.
  3. Fill in:
    • VM Blast Group Number — pick a number, e.g. 9000.
    • Group Description — e.g. All Staff.
    • VMX Locater — No (advanced/legacy).
    • Single MSG — Yes to mark each delivered message as new (caller hears one beep per recipient); No to mark as urgent.
    • Mailboxes — list the extension numbers to blast, separated by &. e.g. 1001&1002&1003&1004.
  4. Click Submit.
  5. Click Apply Config.

Trigger a blast

The blast group is now a destination. Two ways to trigger:

A. Dial the blast group number from any extension: 1. Dial 9000 (or whatever number you set). 2. UnifiedBX prompts you to record a message. 3. After the beep, record your message. 4. Press # when done. 5. The message is dropped into all listed mailboxes.

B. Point an Inbound Route at the blast group: - Useful for letting authorized callers leave blast messages from outside. - Combine with a Pin Set or DISA layer for security.

Verify

After a blast, each recipient should see a new message in their voicemail. They retrieve via *97 as normal.

Common Issues

  • Some mailboxes don't receive. Mailbox doesn't exist, voicemail not enabled, or & separator missing/typo. Verify the Mailboxes list.
  • All recipients get a duplicate. Single MSG mode confusion — Yes is the normal choice.
  • External callers triggered an unauthorized blast. Always gate inbound-route blast triggers with a PIN or DISA. Never expose blast on a plain DID.
  • Blast group as a destination doesn't appear. Apply Config wasn't clicked, or the module isn't enabled (some VM Blast versions are commercial).