To use the Call Back feature from any phone that is not connected to the VoiceMailTel service:

1. - dial your company's main phone number -> press * -> wait for the menu ->  press 3 -> the call will be disconnected and the system will call you back

2. - after you answer the call, a tone is provided in order to call the desired phone number

Note: The Call back feature will work only if your phone sends a valid Caller ID.