HI,
Internal ring delay is set in seconds (not ring cycles).
You can also set each idividual phone by doing *26*nn at the phone (where nn is the number of seconds you want the phone to ring before diverting or dropping to voicemail).
The only exception to these settings is if you are using a ring or hunt group. In this case, the ring delay in the ring/hunt group overrides the individual phone settings.
Kind Regards
S