If someone answers, stay on the line at least five seconds to activate the service. If the line is busy or there is no answer, follow this procedure:
If you do not wish to be alerted to incoming calls, change your settings for number of rings to zero. To do so, pick up your handset, then dial *94 followed by zero.
If you wish to know when calls are incoming, program your call forwarding to redirect to your voicemail access number. Your telephone line needs to be equipped for this option.