Furuno Felcom 250 Service Manual page 170

Reference)
What does (1) in "Missed call (1)" mean?
When the call is forwarded to the terminal which is set as 2
Handset where the tick is placed for 1
shows the number of incoming calls received.
In other words, if ticks are placed for both 1
terminated by the calling party after the forwarding time has passed, the Handset will
identify this case as having received two incoming calls, and therefore the message of
"Missed call (2)" will be displayed.
If you wish not to have the message of "Missed call (x)" displayed, set the setting to
OFF via Settings -> Basic -> Notify -> Missed call.
4.4 Setting for the Incoming Routing
st
ring will have "Missed call (1)" displayed. (1)
st
ring and 2
Missed call (1)
1st ring:
4-24
nd
ring, the screen for the
nd
ring, and the call is
Missed call (2)
1st ring: , 2nd ring: