Yaesu FT3DR Operating Manual page 22

The group member set the DG-ID number to "50"
DG-ID
T50 (transmit)
R50
(receive)
Only group members set to the same DG-ID
number may communicate.
22
DG-ID
T50 (transmit)
R50
(receive)
The other station set the receive DG-ID number to
the number except for "00" may not received the
signals that is not matching the DG-ID number.
Setting the receive DG-ID number to
"00" , all the C4FM digital stations may
be received signals.
DG-ID
T00 (transmit)
R00
(receive)
DG-ID
T90
(transmit)
R90
(receive)
DG-ID
T00 (transmit)
R00
(receive)