Nortel RTU-292 - Manuals

RTU -292 Operations Manual 4.2 FRONT PANEL BUTTONS AND INDICATORS .............................................................................. 4-19 4.3 MAIN BOARD ..................................................................................................................................... 4...

RTU-292 Operations Manual 5.4.15 Time/Date Response...................................................................................................................... 5-17 5.4.16 Version Response ........................................................................................................

RTU -292 Operations Manual List Of Figures F IGURE 2-1 O UTLINE D IMENSIONS ................................................................................................................... 2-18 F IGURE 2-2 C ONTROL AND C ONNECTOR L OCATIONS ...........................................................

RTU-292 Operations Manual List of Tables T ABLE 1-1 E QUIPMENT AND A CCESSORIES S UPPLIED ....................................................................................1-4 T ABLE 1-2 O PTIONAL E QUIPMENT - N OT S UPPLIED ............................................................................

RTU -292 Operations Manual Glossary Adaptation The process whereby the RTU-292 DSP algorithms detect reflected signal information in a connected line and tune the DSP hybrid for a broadband null with minimum reflection. COR Carrier Operated Relay - A receiver signal that gives a positive indication ...

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RTU -292 Operations Manual 1 General Information 1.1 SCOPE This instruction manual provides the information necessary to install, operate, repair and maintain the RTU-292 Radio/Telephone Interface. 1.2 DESCRIPTION 1.2.1 GENERAL The RTU-292 Radio/Telephone Interface Unit will provide a trouble-free a...

RTU-292 Operations Manual automatic. The unit will continuously adapt to changing line conditions, making operation insensitive to line impedance changes. In the Automated Operations mode, the RTU-292 combines the unique features of its adaptive DSP hybrid with fully unmanned auto-dial/auto-answer c...

RTU-292 Operations Manual Table 1-1 Equipment and Accessories Supplied Qty Part Number Item 1 5970-600000 RTU-292 Standard 1 5970-600200 Operation & Maintenance Manual 1 5970-600150 Accessory Kit Accessory Kit Consists of: Qty Part Number Item 1 0150-200000 Handset, PTT, black 1 0313-037770 Cabl...

RTU -292 Operations Manual 1.3.4 OPTIONS RTU-292 options include the: The Voice Prompt Option, which gives verbal prompts to the user as an aid in all aspects of unit operation; The Local Phone Option, which allows a DTMF telephone set to be plugged into the unit, allowing control and access from th...

RTU-292 Operations Manual Table 1-3 RTU-292 SPECIFICATIONS TELEPHONE LINE INTERFACE (J2, Male DB-9 Connector) Output & Input Levels to Phone Line Nominally -12 dBm. (Adjustable -21 to 0 dBm in 3 dB steps). Frequency Response +2 dB, 300 to 3200 Hz. Output Impedance to Phone Line 600 Ohm . VOX Sen...

RTU -292 Operations Manual 2 Installation 2.1 GENERAL This section provides the instructions for unpacking, inspection, installation and set-up. Also included are directions for reshipment of damaged parts or equipment. 2.2 UNPACKING AND INSPECTION After unpacking the unit, retain the carton and pac...

RTU-292 Operations Manual Mark all sides of the package: FRAGILE - ELECTRONIC EQUIPMENT Inspect the package prior to shipment to be sure it is properly marked and securely wrapped. 2.4 INSTALLATION OVERVIEW Follow these four steps to properly install the RTU-292: 1. Provide mechanical mounting for t...

RTU -292 Operations Manual Table 2-1 RTU-292 Factory Default Settings This table describes the settings of all RTU-292 internal adjustments and switch positions as set when the unit is shipped. Feature / Function Adjustment Default Setting Telephone Send and Receive Levels SW2-1, 2,3 -9 dBm Dial Mod...

RTU-292 Operations Manual 2.6 POWER REQUIREMENTS The RTU-292 is designed to operate from 115V or 230V, 47 to 63 Hz, single phase AC power source. The unit will meet all of its specifications over a voltage range of +15% from nominal. Power consumption is 20 VA typical, 50 VA maximum. Alternatively, ...

RTU -292 Operations Manual and +28 VDC (nominal) supplies. The unit will automatically switch over to the use of the DC input when the AC source drops too low or is not available. Slide switch S6 on the Main Board is used to select either +12 or +24/+28 VDC operation. S1 is located near the left fro...

RTU-292 Operations Manual Table 2-2 Recommended Phone Line Settings Type of System Send & Receive Levels Dial-Up lines in a U.S. Domestic phone system -9 dBm Dial-Up lines in most non-U.S. telephone systems -9 dBm PBX Systems -12 dBm Field Wire not connected to a telephone network -6 dBm When us...

RTU -292 Operations Manual 2.8.3 VOX HANGTIME The RTU-292 VOX circuitry holds the radio in the keyed state for a short time after the telephone audio signal is no longer detected. This delay, called hangtime, ensures that the VOX is not de-activated between syllables or during short pauses in speech...

RTU-292 Operations Manual 2.8.6 RX LINE INPUT IMPEDANCE The factory setting for the Receive Line input impedance is 600 Ohms, but if a high input impedance for bridging is needed, the impedance may be set to approximately 47k Ohm. To set to high impedance, move the jumper plug at JP2 from pins 1&...

RTU -292 Operations Manual Table 2-7 Full/Half Duplex SW2-8 Full/Half Duplex Off Full Duplex On Half Duplex * 2.8.10 SERIAL PORT BAUD RATE Internal dipswitches SW1-1 and SW1-2 on the Main board configure the RS-232 baud rate of the unit's serial port as shown in the table below. The factory setting ...

RTU-292 Operations Manual 2.8.12 PASSWORD PROTECTION Dipswitch SW1-5 enables or disables the RTU-292's password protection feature. Password protection prevents unauthorized access to the system from the PSTN line when the RTU-292 is in the Automated Operation Mode. (See section 3.7 for a full expla...

RTU -292 Operations Manual Table 2-12 Local Phone Enable SW1-7 Local Phone Off Disabled On Enabled Table 2-13 Local Phone Ringthrough SW1-8 Ringthrough Off Disabled * On Enabled 2.8.15 TRANSMIT LEVEL SET-UP MODE Dipswitch SW2-7 is used by the factory to enable a special set-up mode. See section 2.10...

RTU-292 Operations Manual 2.9.1 TELEPHONE CONNECTION Connect the telephone line to the PHONE J1 RJ11C standard modular connector. The unit will work with either an AC or DC telephone line. Telephone line polarity is not important. Note that the phone connections are repeated at the terminal block on...

RTU -292 Operations Manual Table 2-16 P1-RADIO (DB-9 Male) Pin Function 1 Balanced Receive Audio Input B 2 Chassis Ground 3 Transmit Audio Output A 4 External Signal Input 5 /Key Output A (Relay Closure to Ground) 6 Receive Audio Input A 7 Transmit Audio Output B 8 /Remote Key Input 9 /Key Output B ...

RTU-292 Operations Manual 2.9.4 TERMINAL BLOCK The terminal block on the rear panel is supplied for convenience when interfacing the RTU-292 to a communications system. The terminal block connections are in parallel with the I/O terminals of the same name found on different connectors. If the teleph...

RTU -292 Operations Manual 2.9.5 RS-232 CONNECTION Use P2 on the rear panel to connect to the RTU-292 RS-232 interface. RS-232 control is fully explained in section 5. Table 2-19 P2 – RS-232 Connector (DB-9 Male) Pin Function 1 No Connection 2 RS-232 RX Input 3 RS-232 TX Output 4 Reserved- Do not co...

RTU-292 Operations Manual Figure 2-1 Outline Dimensions JPS Communications, Inc. 2-18

RTU -292 Operations Manual Figure 2-2 Control and Connector Locations JPS Communications, Inc. 2-19

RTU-292 Operations Manual Figure 2-3 Location Of Internal Option Settings JPS Communications, Inc. 2-20

RTU -292 Operations Manual Figure 2-4 Internal Option Setting Details JPS Communications, Inc. 2-21

RTU-292 Operations Manual Figure 2-5 Audio Interface Wiring Diagram JPS Communications, Inc. 2-22

RTU -292 Operations Manual Figure 2-6 Interface Details JPS Communications, Inc. 2-23

RTU-292 Operations Manual 2.11 INSTALLATION CHECKLIST Table 2-20 Installation Checklist Provide suitable Mounting and Cooling. See Section 2.5. Check AC Line voltage selection. See Section 2.7. DC Operation needed? See Section 2.7. Make Interconnections. See Section 2.9 for External Interconnect Inf...

RTU -292 Operations Manual 3 Operation 3.1 GENERAL This section contains information and instructions required for proper operation of the RTU-292. 3.2 FRONT PANEL CONTROLS, INDICATORS AND CONNECTORS 3.2.1 MAIN POWER SWITCH The Main Power switch controls the external DC power to the unit. The switch...

RTU-292 Operations Manual 3.3 REAR PANEL CONNECTORS Accessible at the RTU-292 rear panel are the radio connector, telephone line and local phone connector, the signal terminal block, the DC power terminal block, an RS-232 connector, and the AC power connector/voltage selector/fuse holder assembly. S...

RTU -292 Operations Manual 3.4 OPERATION 3.4.1 OPERATION OVERVIEW The RTU-292 is a flexible piece of equipment that contains a telephone and a radio/telephone interface circuit with a unique adaptive hybrid. These circuits are arranged so that they can be used together or independently in several di...

RTU-292 Operations Manual 3.4.4 RECEIVING A TELEPHONE CALL NOTE The handset-to-telephone path may be left in the enabled condition (HANDSET/PHONE LED ON) even when the unit is not connected to the telephone line. Only one button (TEL LINE/PHONE) must then be pushed to answer the telephone. The follo...

RTU -292 Operations Manual noise source is switched off, the LED is lit continuously, and the unit is ready for operation. This adaptation procedure normally takes less than one second. For adaptation to be successful, the far end of the phone line must be quiet (there must be no signal coming into ...

RTU -292 Operations Manual 3.4.10 TRANSMITTER KEYING, FULL DUPLEX SYSTEM In a full duplex system, the transmitter can be held continuously keyed during a conversation, because the system can receive and transmit at the same time. Thus, VOX is not required. In this case, the transmitter may be keyed ...

RTU-292 Operations Manual 3.7.1.3 Waiting For Input (QUERY) When the RTU-292 needs user input it will play 1 short low-pitched tone followed by 1 short high pitched tone. A QUERY is played whenever the user needs to enter some data such as a password or telephone number. 3.7.1.4 Radio Is Keyed (KEYE...

RTU -292 Operations Manual The following paragraphs describe the sequence of operations used to automatically place a call through the RTU-292 to a radio via the outside phone line. This description assumes that the RTU-292 has a Voice Prompt Option installed. Units without a Voice Prompt Option wil...

RTU-292 Operations Manual 3.7.3.4 The RTU-292 Enters the COMMAND Mode After the RTU-292 completes the adaptation sequence, it enters the Command Mode and waits for the caller to respond with commands. In Command Mode the user may enter DTMF commands by pressing a number on the telephone’s keypad. Th...

RTU -292 Operations Manual the unit signals that it is dropping the link due to a lack of activity, either party may prevent the disconnection by speaking within five seconds. 3. Pressing the OFF button on the front panel of the RTU-292 will also cause the system to disconnect. 4. When the local pho...

RTU-292 Operations Manual Table 3-1 Standard DTMF Operational Commands These commands may be entered by the RTU-292 front panel keypad, or by the keypad of a connected telephone or by a telephone set wired to the Local Phone Option. See 3.7.6 for special instructions regarding the use of the front p...

RTU -292 Operations Manual Table 3-2 Programming Mode DTMF Commands These commands may be entered by the RTU-292 front panel keypad*, or by the keypad of a connected telephone or by a telephone set wired to the Local Phone Option. The unit must be put into the programming mode by entering *99 before...

RTU-292 Operations Manual 3.7.7 RTU-292 PASSWORD PROTECTION The password protection feature is enabled by a dipswitch setting (SW1-5, see Table 2-1). When passwords are enabled, access to the system is denied unless a user enters the correct password. The same password applies both to access via tel...

RTU -292 Operations Manual 3.7.10 USING THE RTU-292 SPEED DIAL FEATURE The RTU-292 has the ability of storing 99 telephone numbers in non-volatile memory. These numbers may be used when making a call using via UHF/VHF radio with a DTMF keypad. To use the speed dial feature, simply enter the speed di...

RTU-292 Operations Manual 3.7.11 OPTIONAL 4 WIRE OPERATION The unit can be set to operate with a four wire device instead of a standard 2 wire phone. The additional I/O is handled by header J6 on the main PCB. The STU-III option makes use of this capability. To put the RTU-292, first place the unit ...

RTU -292 Operations Manual 4 RTU-292 Theory Of Operation 4.1 GENERAL This section gives enough detail of the theory of operation of the RTU-292 audio and power supply sections to allow them to be troubleshot in the field. The same level of detail is not supplied for the DSP module and the CPU portio...

RTU-292 Operations Manual 4.3.2 TELEPHONE INTERFACE CIRCUITS 4.3.2.1 Telephone Send Circuits Amplifier U1B generates the Telephone Send signal (the audio which is sent down the phone line from the RTU-292). U1B is configured as an inverting stage with its gain set by a combination of input and feedb...

RTU -292 Operations Manual the signal at A/D 2 from that at A/D 1 and the difference appears on D/A 1, which is named TEL after passing through gate U8C. 4.3.2.3 Ring Detector and Tone Ringer Integrated circuit U7 is an optocoupler that senses the ring voltage on the telephone line. When a ring volt...

RTU-292 Operations Manual 4.3.3.4 DTMF Detector Circuit U25 is a DTMF detector/decoder dedicated to listening for DTMF signals from the radio. Its input is connected to the leveled radio receive signal at U20B-7. The DTMF data is read by the processor. A separate DTMF detector running in DSP softwar...

RTU-292 Operations Manual 4.3.7 POWER SUPPLY The power supply is detailed in page 8 of 9, Figure 8-2. It supplies regulated DC voltages of +5V, +12V, -5V, and -12V from both AC and DC inputs. 4.3.7.1 AC Power Supply The AC power supply is a conventional passive regulator supply with a small PC mount...

RTU -292 Operations Manual Bus drivers U60 and U61 are the input devices for the front panel switches; latches U62 and U63 light the front panel LEDs. Latches U50 through U53 send control signals mainly to the audio circuit sections. U56 and U57 send inputs to the data bus; U54 and U55 read Option s...

RTU-292 Operations Manual 4.5.3 VOICE PROMPT SOFTWARE The voice prompt board software receives the prompt number command through J1 and translates it into the prompt address in EPROM U5. 4.6 LOCAL PHONE OPTION The Local Phone Option allows a standard telephone set to be plugged into an RJ-11C modula...

RTU -292 Operations Manual 5 Remote Control Protocol 5.1 GENERAL Included in this section are instructions for controlling the RTU-292 via its RS-232 serial communications port. The protocol listed in this section is the standard command set that accompanies the standard software version. If an RTU-...

RTU-292 Operations Manual When a command is sent to the RTU-292 it is buffered up and acted on as soon as possible. Once the command has been executed, the RTU-292 will return a "Status" response. The format of this status response is explained in greater detail in the section 5.4, "Stat...

RTU -292 Operations Manual 5.3.1 NULL Command <CR> This command may be used as a quick way to insure that RS-232 communication with the RTU-292 is functioning. The command has no parameters. Expected Response: NULL Response. Example: <CR> ; Command sent to the RTU-292. % E0 <CR> ; ...

RTU-292 Operations Manual 5.3.4 Date Command DATE <ddmmyy> <CR> This command is used to check or set the date on the RTU-292 internal clock. If no parameters are given the command simply returns the time/date. The parameter format is day (01-31), month (01-12), year (00-99). Note: the Ca...

RTU -292 Operations Manual 5.4 STATUS RETURNED FROM THE RTU-292 The following section describes the various responses the user may expect from the RTU-292. The format of a response string is: %response <data> <data> ... <data> Exx <CR> There are 3 types of responses: • Synchr...

RTU -292 Operations Manual 5.4.4 Dial Response %DIAL <OPER|LP|number string> Exx <CR> Type: Synchronous. Response To: Dial Command. This response indicates that the given number was dialed. Valid digits for the number string are '0'-'9', the characters * # and ','. The comma character is...

RTU-292 Operations Manual 5.5 CALL PROGRESS RESPONSES FROM THE RTU-292 The following section describes the responses the user may expect from the RTU-292 when Call Progress is active. Call progress is active whenever the PSTN is “off-hook”. Table 5-3 Call Progress Responses %CP_RING Exx <CR> C...

RTU -292 Operations Manual 6 Maintenance and Repair 6.1 GENERAL Included in this section are the Test Procedures and performance evaluation criteria for the supplied equipment. Also provided is a Fault Analysis Table (Table 6.1) to aid in isolating a fault. Table 6.2 identifies replaceable parts. 6....

RTU-292 Operations Manual 6.5.2 HYBRID BALANCE MEASUREMENT The test procedure outlined below allows measurement of the hybrid balance, or trans-hybrid loss, attainable with the RTU-292. This characteristic determines how much radio receiver input signal will leak into the transmitter output of the R...

RTU -292 Operations Manual Figure 6-1 Hybrid Balance Test Set-Up 6.5.2.1 Main Hybrid Test Procedure 1. Disconnect the RTU-292 from all other equipment and connect the test equipment as shown in Figure 6.1. 2. Set the PSTN levels for -9 dBm using Option SW2-1, -2, and -3. 3. Start with the following ...

RTU -292 Operations Manual 6.5.3 VOX SENSITIVITY MEASUREMENT The following test procedure measure the sensitivity of the VOX in the RTU-292. This is the amplitude of the incoming signal from the telephone line required to trigger the VOX. Figure 6-2 VOX Sensitivity Test Set-Up 6.5.3.1 VOX Test Proce...

RTU-292 Operations Manual Table 6-1 Fault Analysis No LEDs light after power-up Check for correct setting of DC voltage switch S6. Check for proper polarity of DC input. (If polarity is reversed, the unit will not be damaged, but will not operate. At power-up, the PEAK LED flashes at a steady rate a...

RTU -292 Operations Manual Table 6-2 Replaceable Parts List 5970501000 Chassis Assembly Part No. Description Reference Designator 153080001 Speaker, 8 ohm, 3" sq LS1 360003001 Conn, MTA-156, 3-pin, receptacle For P4 362005001 Conn, circular, pnl mt receptacle J1 362007000 Conn, cable, 7-pin, AMP...

RTU-292 Operations Manual 5970506100 RTU-292 Main PCB Assembly Part No. Description Reference Designator 320010500 Cap, elect, 1uF, 50VDC C103 320020500 Cap, elect, 2.2uF, 50VDC C3,29,35,125 320100500 Cap, elect, 10uF, 50VDC C91 320101250 Cap, elect, 100uF, 25VDC C21,33,42,80,124,126 320101500 Cap, ...

RTU -292 Operations Manual 7 RTU-292 Options 7.1 GENERAL Included in this section are installation instructions for field installable RTU-292 options and set-up instructions for all options that have configuration dipswitches, jumpers, potentiometers, etc. Operational instructions are provided for a...

RTU-292 Operations Manual 7.2 VOICE PROMPT OPTION When the Voice Prompt Option is installed, the RTU-292 will send helpful prompts to system users to guide them in proper system operation and inform them of the current system status. The standard language is female English, though other languages an...

RTU -292 Operations Manual Figure 7-1 Voice Prompt Option Installation JPS Communications, Inc. 7-3

RTU-292 Operations Manual 7.3 LOCAL PHONE OPTION The RTU-292 has an extra rear panel modular phone jack that allows a standard DTMF telephone set to be plugged directly into the unit when the Local Phone Option is installed. This Local Phone set can make and receive calls via the outside line, commu...

RTU -292 Operations Manual 7.3.2 LOCAL PHONE OPTION OPERATION When the handset of the local phone is picked up, a special dial tone, generated by the RTU-292, will be heard in its receiver. The user then has three options: Table 7-5 Local Phone DTMF Commands DTMF Command Function 0 Place a call to t...

RTU-292 Operations Manual 7.4 VMM-100 OPTION The VMM-100 VMR Module implements Voice Modulation Recognition (VMR) which enables the receive audio path when speech is present and disables it when speech is not present. This module also implements a form of noise reduction known as "dynamic peakin...

RTU -292 Operations Manual 7.4.2 VMM-100 Software The VMM-100 DSP software can provide voice modulation recognition, noise reduction, or both. The module's operating mode is set by logic inputs at P9 pins 3 and 4 7.4.2.1 VMR Algorithm The VMR algorithm works by passing the audio through a series of ...

RTU-292 Operations Manual The dipswitches on the VMM-100 module may be changed at any time during operation; the DSP is constantly checking the states of these switches. The VMR and Noise Reduction modes can be used individually or simultaneously. They are toggled off & on via standard DTMF Oper...

RTU -292 Operations Manual Table 7-6 VMM-100 SPECIFICATIONS GENERAL Frequency Response 100 to 3400 Hz +/- 2dB Input Level 0 dBm nominal Input Impedance Unbalanced 10k Ohm DSP Output Delay < 10mS Noise Reduction Type Dynamic Peaking around coherent signals Noise Reduction Approximately 10-20 dB Au...

RTU-292 Operations Manual Table 7-7 VMM-100 I/O CONNECTOR INFORMATION (P9) Pin Signal 1 Audio Input (see specs above) 2 Audio Output (see specs above) 3 NR1; Logic Input; Low selects DSP Noise Reduction 4 NR2; Logic Input; Low selects DSP Voice Modulation Recognition 5 -5V; Supply Input (see specs a...

RTU -292 Operations Manual 7.5 DTMF ACCESS OPTION This option allows a radio user to use his DTMF keypad to quickly place a telephone call via the RTU-292. If the user does not have DTMF capability, the Squelch Break Access Option allows the use a series of squelch breaks to automatically connect to...

RTU-292 Operations Manual If the number is busy, the busy tones will be broadcast for approximately 5 seconds before the RTU-292 terminates the call attempt. Once the RTU-292 detects ringback, the RTU-292 begins a 30 second timer and waits for the call to be answered. If this does not happen before ...

RTU -292 Operations Manual 7.6 SQUELCH BREAK ACCESS OPTION This option allows a radio user who does not have DTMF capability to quickly place a telephone call via the RTU-292. The radio user simply transmits a series of squelch breaks and is then automatically connected to the telephone at the RTU-2...

RTU-292 Operations Manual as a warning. The radio caller or the phone user may initiate activity within 5 seconds of the warning beeps to reset the timer. If neither user does so, the unit will then terminate the call. To terminate the call at any time, the radio user may enter * # or give three squ...

RTU -292 Operations Manual 7.8 RADIO CONTROL OPTION When this software option is enabled, the RTU-292 may be used to control a Motorola URC-200 radio connected to the unit via the RS-232 serial port. The control commands may be entered by the RTU-292 front panel keypad, or by the keypad of a connect...

RTU-292 Operations Manual While the operator is using the keypad to control the RTU-292, the unit will not be available for: • PSTN Auto Answering. • Radio Squelch Break Access Operation. • Radio DTMF Access Operation. • Local Phone Control. Table 7-9 DTMF Radio Control Commands These commands are i...

RTU -292 Operations Manual 8 SCHEMATIC DIAGRAMS 8.1 GENERAL This section has all RTU-292 schematic diagrams. They include: Figure 8-1 Front Panel Schematic A single sheet showing the switch boards and other front panel components. Figure 8-2 Main Board Schematic This nine page schematic details all ...

RTU -292 Operations Manual 9 Index * C * #....................................................................... 3-14, 3-15 Call Begins ......................................................... 7-12, 7-13 * 0................................................................................ 3-14 Call ...