Kyocera KM-2540 Operation Manual page 146

6-4
> If the call is from a telephone...
1 The fax will ring to let you know that you should answer. Pick up
the telephone receiver within 30 seconds after the ringing starts.
Note If the telephone receiver is not picked up within 30
seconds, the fax machine will switch to fax reception.
2 Speak with the other party.
Note At the end of the conversation, fax reception can be
initiated manually. (Refer to Initiating the Fax Connection
Manually (Manual Fax Reception) on page 3-22.)
> If the call is from a fax...
Fax reception will start automatically.
Various Settings and Registration