Kenwood TK255 User Instruction Manual page 11

The call button was pressed with a barred number in the display.
The call attempt is inhibited
The call has been acknowledged by the Network, but there are no channels
available to connect the call at the moment.
connect the call when a channel becomes free.
The call has been acknowledged by the Network, but the called ('B' party) party
is engaged on another call. The Network will attempt to connect the call when
the other party becomes free.
Fylde Microsystems Ltd - Kenwood User Instructions ver 0.09
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The Network will attempt to
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