Following message codes explained in the context of MS in TMO mode:

  • PTT Denied followed by Unit Not Attached. 
    This message occurs while the radio is set in TMO mode and tuned to a group that is not recognized by the network (either does not exist or the MS is not whitelisted to access the TG). Periodically Attachment Failed message is displayed as the MS is trying to request access to the TG. Solid red light is shown.
  • While pressing PTT, Please Wait Connecting (or Please Wait)
    It is displayed as the RSSI level is low, high bit rate error, the MS require to resend the packages multiple times.
  • Party Not Available 
    The message shown while trying to establish contact with the network, the cause is most probably the RSSI level, despite the green LED flashing.