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Collaboration, Voice & AV · Intermediate

Voicemail PIN Security

Policies that enforce strong voicemail PINs and lockouts to prevent unauthorized mailbox access and toll fraud.

Definition

Weak or default PINs let attackers access messages, change greetings or use outdial features for toll fraud. CUCM and Unity Connection credential policies enforce minimum length, block trivial PINs such as repeated digits or the extension, require changes and lock accounts after failed attempts. Restricting transfers and outdial in voicemail COS adds protection.

Example

A credential policy requires 8-digit PINs and locks the mailbox after five failed attempts.

Exam tip

Pair strong PIN policies with restricted transfer rules in voicemail COS.

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