Is it true that each extension defaults to the same password which should be changed for security?

Each extension in the 3CX system does not default to the same password, which is a crucial aspect of maintaining security within a VoIP environment. Instead, each extension is assigned a unique password upon creation. This design helps to mitigate the risk of unauthorized access by ensuring that each user's credentials are distinct.

Ongoing security practices recommend changing passwords periodically to enhance protection against potential breaches; however, this does not imply that all extensions start with a common password. Unique passwords provide a better security framework and reduce vulnerabilities that could arise if all users were to share the same access credentials.

The reasons behind the other options not being correct reflect common misunderstandings about system security settings. While it is essential to promote the use of strong, individualized passwords, especially for new or admin extensions, the default setup itself already emphasizes unique password generation for each extension, underscoring a proactive security measure rather than waiting for users to change a common default password.