Nortel Networks RTU-292 operation manual Scope Description, General

Page 11

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

1.2.1GENERAL

The RTU-292 Radio/Telephone Interface Unit will provide a trouble-free automatic connection between a radio system and telephone or other two-wire line. The unit is suited for use with HF, VHF, UHF or satellite systems and is applicable to full or half-duplex modes. The RTU- 292 incorporates a full-featured telephone set and monitor speaker. Flexible switching allows many operating scenarios.

The RTU-292 replaces the JPS Communications RTU-282. The RTU-292 contains all of the features and capabilities of the RTU-282, along with some major improvements. The new DSP used in the RTU-292 allows improved Call Progress Detection. Additional circuitry on the Main Board provides the ability to detect line reversal when a telephone caller hangs up the phone, allowing immediate call termination when used with phone systems that have Reverse Battery Signaling. A new standard feature with the RTU-292 is RS-232 control of the unit. A new optional feature is DTMF Access of the system via radio.

A front panel keypad allows DTMF or Pulse dialing and the built-in handset is pushbutton- selectable for communication with either the telephone or the radio. Since the telephone may place and receive calls, the operator can quickly and easily establish a phone patch connection. When used in the manual mode, the RTU-292 patches a telephone into a radio link by essentially the same method as with a conventional phone patch; the quality of the patch, however is greatly improved. First, a radio-to-radio link is established. Then, using the telephone in the RTU-292, the operator places a phone call to the distant telephone that will be patched into the radio link. Once the telephone-to-telephone link is made, the operator simply pushes a front panel pushbutton. The RTU-292 adapts to the phone line, and the distant phone becomes part of a telephone-to-radio-to-radio communications link. Once this link is established, the operator may communicate with either party using the RTU-292’s handset, and may monitor both sides of the conversation with the speaker.

The RTU-292 uses a unique adaptive hybrid implemented with a DSP (Digital Signal Processor) to eliminate conventional VOX and hybrid adjustments for a quick and simple set- up. The unit works by measuring the characteristics of the telephone line. A short burst of white noise is placed on the telephone line. During this burst, the adaptive hybrid in the unit measures the signal reflected from the phone line and adapts the RTU-292 to the impedance of the phone line, minimizing the reflected signal. This achieves a broadband hybrid balance on the reactive phone line. This is simply not possible with any type of conventional active or passive hybrid. Not only is a deep, broadband null provided, but also the action is completely

1-1

JPS Communications, Inc.

Image 11
Contents JPS P/N Revision July JPS Communications, IncPhone 919 Fax 919 Proprietary StatementTable of Contents RTU-292 Theory of Operation Front Panel Buttons and Indicators Schematic Diagrams List Of Figures List of Tables Glossary This page intentionally left blank General Scope DescriptionTelephone Interface AssembliesMain Board DSP Module Power Supply SectionHandset/Speaker Interface Radio InterfaceQty Part Number Equipment and Accessories SuppliedOptional Equipment Not Supplied OptionsRTU-292 Specifications Reshipment of Equipment GeneralUnpacking and Inspection FCC Part 68 Regulations Installation OverviewInstallation Considerations Feature / Function Adjustment Default Setting 1RTU-292 Factory Default SettingsLine Voltage Selection Power RequirementsInput Power Selection DC Input Power SelectionSetting Telephone Send and Receive Levels Configuring the RTU-292Programming Mode Setup Parameters Telephone Send/Receive Levels Recommended Phone Line SettingsFactory default settings are indicated by an asterisk Type of SystemVOX Sensitivity VOX HangtimeVOX Hangtime VOX SensitivityRX Line Input Impedance Dial ModeDial Mode Telephone Ring VolumeSW2-8 Full/Half Duplex Off Full Duplex Radio Control ModeSW1-3 Radio Control Off Disabled Enabled Full/Half DuplexVoice Prompts Password Protection10Password Protection 11Voice Prompts Enable13 Local Phone Ringthrough 12Local Phone Enable14TX Level Set-up Mode Interconnect InformationRadio Connection Telephone Connection15J1 TEL Line RJ-11C Pin Function17J7 Handset RJ12C Jack Handset Connector16P1-RADIO DB-9 Male 18Terminal Block 6 Position Terminal Block5 RS-232 Connection Audio Level Setup and Adjustments19P2 RS-232 Connector DB-9 Male Setting the Transmit Level10.1.2 Setting the Receive LevelRTU-292 Operations Manual Outline Dimensions Control and Connector Locations Location Of Internal Option Settings Internal Option Setting Details Audio Interface Wiring Diagram Interface Details Installation Checklist Installation ChecklistOptions Installation and Configuration Front Panel CONTROLS, Indicators and Connectors TEL Line Buttons Speaker Volume ControlPhones Volume Control KeypadKEY Pushbutton Speaker ButtonsAuto ANS Button Audible Ring Button7 P1 AC Power Connector Rear Panel Connectors1 P1 Radio Connector 4 J2 Local Phone ConnectorPlacing a Telephone Call OperationOperation Overview USE of the RTU-292 Speaker to Monitor AudioPutting a Telephone Call on Hold Using the Handset with the RadioConnecting the Radio to the Telephone Line Receiving a Telephone Call8.2 Manual Phone Patch Procedure8.1 8.6 8.38.4 8.5Automated Operation Negative Acknowledge ErrorRemote KEY Self TestRadio Is Unkeyed Unkeyed Disconnecting DisconnectWaiting For Input Query Radio Is Keyed KeyedRTU-292 Adapts To The Phone Line Caller Enters The Password if enabledCaller Dials The RTU-292 Terminating a Call RTU-292 Enters the Command ModePlacing a Call in the Command Mode Operating the RTU-292 from the Front Panel Keypad Dtmf Control CommandsDtmf Command Function 1Standard Dtmf Operational Commands2Programming Mode Dtmf Commands Calling Timer RTU-292 Password ProtectionInactivity Disconnect Timer Programming the Speed Dial Directory Using the RTU-292 Speed Dial FeatureUsing the Speed Dial Feature Optional 4 Wire Operation Factory ResetSpeed Dial Reset Audio BUS Arrangement Front Panel Buttons and IndicatorsMain Board Telephone Receive Circuits Telephone Interface CircuitsTelephone Send Circuits Transmitter Audio Output Ring Detector and Tone RingerRadio Interface Circuits Receiver Input AmplifierSpeaker and Headphone Circuits Dtmf DetectorFSK Modem Microphone CircuitPeak Detector Audio DelayAdaptive Hybrid Noise Generator8 CPU Power SupplyAC Power Supply DC Power SupplySpeech Processor Option Interface BoardVoice Prompt Option Prompt Tone GeneratorDIAL/BUSY Generators Local Phone OptionVoice Prompt Software Interface CircuitryCommands Sent to the RTU-292 RS-232 Remote Control Overview1Command Summary Audible Ring Command Null CommandAuto Answer Command Dial Command Date CommandDtmf Command Disconnect CommandHandset Radio Command Handset Phone CommandSpeaker Radio Command Speaker Phone CommandSD nnALL num.? CR Speed Dial CommandTel-Line Radio Command Tel-Line Phone CommandSoftware Version Command Time CommandResponse Summary Status Returned from the RTU-292Call Starting Response Null ResponseAuto Answer Response Dtmf Response Dial ResponseDisconnect Response Handset Radio Response Elapsed Time ResponseHandset Phone Response Speaker Radio Response Speaker Phone ResponseTel-Line Radio Response Speed Dial ResponseTel-Line Phone Response Version Response Time/Date ResponseCall Progress Responses Response Error CodesResponse Error Codes Call Progress Responses from the RTU-292Alignment Preventive MaintenanceRepair or Replacement Performance TestingHybrid Balance Measurement Hybrid Balance Test Set-Up Main Hybrid Test Procedure Alternate Hybrid Test Procedure VOX Sensitivity Measurement VOX Sensitivity Test Set-Up VOX Test ProcedureFault Analysis Description Replaceable Parts ListDescription Reference Designator RTU-292 Operations Manual Reference Designator RTU-292 Options Special Software VersionsOperation Installation and ConfigurationVoice Prompts Enable SW1-6 Voice Prompts Off Disabled EnabledVoice Prompt Option Installation SW1-8 Ringthrough Off Disabled Enabled Local Phone Option Installation and ConfigurationLocal Phone Enable SW1-7 Local Phone Off Disabled EnabledLocal Phone Option Operation 5Local Phone Dtmf CommandsVMM-100 Analog Interface VMM-100 HardwareVMM-100 DSP Section Noise Reduction Algorithm VMM-100 Installation and ConfigurationVMM-100 Software VMR AlgorithmVMM-100 Option Installation Environmental VMM-100 SpecificationsVMM-100 Switch Functions VMM-100 I/O Connector Information P9Dtmf Access Option After the Call Begins RTU-292 Prompts for Confirmation Squelch Break Access OptionChecking The Time And Date Setting The TimeSetting The Date Call Logging OptionControlling the Radio VIA the RTU-292 Front Panel Keypad Radio Control OptionCommand Followed By Command Description 9DTMF Radio Control CommandsSchematic Diagrams Blank Index Environmental Self Test Speech Processor