Uniden DTL-8R-1 User Operation And Specification page 29

Step 5 When call partner answers call. The LCD shows this message to indicate phone is
in Talk mode.
<Notes>
1) When Base Station is not connected to PBX, Handset shows message
"DISCONNECT".
2) When Handset cannot connect to Base Station, error tone will be emitted and "Out of
Range" message is shown for 5 seconds on the LCD. Then Handset goes to standby
mode.
3) When wired phone is selected, Handset cannot go Talk mode.
Talk Speaker
28