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RTU-292 Operations Manual
3.1 GENERAL ..............................................................................................................................................3-1
3.2 FRONT PANEL CONTROLS, INDICATORS AND CONNECTORS.................................................3-1
3.2.1 MAIN POWER SWITCH ...............................................................................................................3-1
3.2.2 HEADPHONE JACK......................................................................................................................3-1
3.2.3 HANDSET JACK ...........................................................................................................................3-1
3.2.4 HANDSET ......................................................................................................................................3-1
3.2.5 SPEAKER .......................................................................................................................................3-1
3.2.6 KEYPAD.........................................................................................................................................3-2
3.2.7 SPEAKER VOLUME CONTROL..................................................................................................3-2
3.2.8 PHONES VOLUME CONTROL....................................................................................................3-2
3.2.9 TEL LINE BUTTONS ....................................................................................................................3-2
3.2.10 HANDSET BUTTONS...................................................................................................................3-2
3.2.11 SPEAKER BUTTONS....................................................................................................................3-3
3.2.12 TEL VOX........................................................................................................................................3-3
3.2.13 AUTO ANS BUTTON....................................................................................................................3-3
3.2.14 AUDIBLE RING BUTTON............................................................................................................3-3
3.2.15 KEY PUSHBUTTON .....................................................................................................................3-3
3.2.16 PEAK LED......................................................................................................................................3-3
3.3 REAR PANEL CONNECTORS.............................................................................................................3-4
3.3.1 P1 RADIO CONNECTOR..............................................................................................................3-4
3.3.2 J1 TEL LINE...................................................................................................................................3-4
3.3.3 TERMINAL BLOCK......................................................................................................................3-4
3.3.4 J2 LOCAL PHONE CONNECTOR................................................................................................3-4
3.3.5 P2 RS-232 CONNECTOR .............................................................................................................3-4
3.3.6 DC INPUT TERMINAL BLOCK...................................................................................................3-4
3.3.7 P1 AC POWER CONNECTOR.....................................................................................................3-4
3.4 OPERATION ..........................................................................................................................................3-5
3.4.1 OPERATION OVERVIEW ............................................................................................................3-5
3.4.2 USE OF THE RTU-292 SPEAKER TO MONITOR AUDIO ........................................................3-5
3.4.3 PLACING A TELEPHONE CALL.................................................................................................3-5
3.4.4 RECEIVING A TELEPHONE CALL ............................................................................................3-6
3.4.5 PUTTING A TELEPHONE CALL ON HOLD..............................................................................3-6
3.4.6 USING THE HANDSET WITH THE RADIO...............................................................................3-6
3.4.7 CONNECTING THE RADIO TO THE TELEPHONE LINE........................................................3-6
3.4.8 MANUAL PHONE PATCH PROCEDURE...................................................................................3-7
3.4.9 TRANSMITTER KEYING, HALF DUPLEX SYSTEM ...............................................................3-8
3.4.10 TRANSMITTER KEYING, FULL DUPLEX SYSTEM................................................................3-9
3.5 REMOTE KEY .......................................................................................................................................3-9
3.6 SELF TEST.............................................................................................................................................3-9
3.7 AUTOMATED OPERATION ................................................................................................................3-9
3.7.1 TONE PROMPTS ...........................................................................................................................3-9
3.7.2 VOICE PROMPTS........................................................................................................................3-10
3.7.3 CALLING THE RTU-292 VIA THE OUTSIDE LINE................................................................3-10
3.7.4 PLACING A CALL IN THE COMMAND MODE:.....................................................................3-12
3.7.5 TERMINATING A CALL:...........................................................................................................3-12
3.7.6 DTMF CONTROL COMMANDS................................................................................................3-13
3.7.7 RTU-292 PASSWORD PROTECTION .......................................................................................3-16
3.7.8 INACTIVITY DISCONNECT TIMER ........................................................................................3-16
3.7.9 CALLING TIMER ........................................................................................................................3-16
3.7.10 USING THE RTU-292 SPEED DIAL FEATURE .......................................................................3-17
3.7.11 OPTIONAL 4 WIRE OPERATION .............................................................................................3-18
3.8 FACTORY RESET ...............................................................................................................................3-18
3.9 SPEED DIAL RESET...........................................................................................................................3-18
4 RTU-292 THEORY OF OPERATION .....................................................................................................4-19
4.1 GENERAL ............................................................................................................................................4-19
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