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Power On/Off Powering On • Press and hold the On-Off/End/Home key • MTP3550 performs a self-check and system registration routine. • The display shows additional information while the MTP3550 is registering on the system. Powering Off • Press and hold the On-Off/End/Home key. •...
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Talkgroup Selection You can select a Talkgroup in one of the following ways: Rotary knob Navigation key Alphabetical search feature Folder search Numeric keypad entry - Speed Dialing (index) My Groups Page Ref – FUG - 34...
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Group Call Operations Making a Group Call (Push to Talk – Release to Listen) • Select required Talkgroup. • Press and hold PTT. • Wait for Talk Permit Tone and then speak. • Release PTT to listen. Page Ref – FUG - 38...
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Group Call Operations (DMO) Initiate DMO Group Call Change to Direct Mode Operation Select chosen Talkgroup Press and hold the PTT Wait for the talk permit tone and speak Release the PTT button to listen.
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Individual Call Operations Making a Call Menu 4 displays private ISSI Enter required ISSI on keypad (or access from phonebook) Press PTT to make call Answering the Call When radio rings - Press PTT to answer ...
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Short Code Keys •Transmit Inhibit - Hold 1 Key ON/OFF •Direct Mode ( off network 2KM line of site ) – Hold 2 Key ON/OFF •Covert Mode – Hold 5 Key ON/OFF •Screen turn upside down – Hold 0 Key ON/OFF...
LED INDICATOR LED Indicator Description Solid green In use Flashing green In service Solid red Out of service Flashing red Connecting to a network at power Solid orange Transmit Inhibit active – Channel busy in DMO Flashing orange Incoming call No indication Switched off or Covert Mode Page Ref –...
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Message Operations Press Menu key Select Messages Select New Message Type message Click OK Select mail recipient from Contact List or enter ISSI number Select Send Page Ref – FUG - 128...
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Emergency Call Operations (TMO) To initiate Emergency Mode: • Push and hold the Emergency Key until Emergency Mode starts • 0.5 seconds Emgy In Use Water Services Exit Optns Exit To exit Emergency Mode: • Push and hold the Exit Key until Emergency Mode stops •...