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System Service Extension Numbers

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Reserved System Extension Numbers

PortSIP PBX assigns default extension numbers to built-in system services. These extension numbers are reserved and cannot be used when creating user extensions.

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Default System Extensions

  • Call Announcement Service: 555 To change this number, go to Advanced Services > Automatic Callback.

  • Call Park Service: 666 To change this number, go to Advanced Services > Call Park > Global Settings.

  • Voicemail Service: 777 To change this number, go to Advanced > Voicemail.

  • Call Monitor Service: 888 To change this number, go to Contact Center > Monitor Service.

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