EFJohnson 7243 LTR-Net Portable UHF manual Talk-Around, Call Guard Squelch

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CONVENTIONAL FEATURES

While the PTT switch is pressed, the receiver is enabled so that activity on the channel can be monitored. The PTT switch must be released and then pressed again to make another call attempt. Occasion- ally, a busy condition may be detected even though no one is talking. To key the transmitter in this case, release the PTT switch and then immedi- ately press it again.

There is also a programmable option with this feature to allow trans- mitting with a busy channel if the correct Call Guard signal is detected. The Transmit Disable On Busy feature is enabled or disabled on each conventional group by system operator programming. If this feature is disabled, the transmitter will key even if the group is busy.

Talk-Around

Normally, all transmissions go through a repeater which usually increases range because the repeater transmits at a higher power level and has a higher antenna. However, this means that if you are out of radio range of the repeater, you cannot talk to anyone even if the mobile you are calling is only a short distance away. To allow communication if this occurs, talk-around groups can be programmed which enable direct mobile-to-mobile communication without going through a repeater.

Talk-around is then automatically enabled by selecting one of these groups. There is no special talk-around option switch or indicator. However, the group alpha tag on the lower line of the display may be used to indicate groups programmed for this feature. Talk-around is not available on LTR-Net and LTR systems.

Call Guard Squelch

The Call Guard squelch feature eliminates distracting messages intended for others using the channel. This is done by using a subaudible tone or digital code to control the squelch. This tone or code is unique to a user or a group on that channel. It is transmitted with the voice signal but is not heard because it is in the subaudible range and attenuated by a filter. Call Guard squelch can be programmed on each conventional group. LTR- Net and LTR operation uses ID codes to perform a similar function.

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Contents Operating Manual Page Safety Training Information Electromagnetic Interference/Usage Compatibility Table of Contents Table of Contents Table of Contents Quick Reference Guide BusyFeatures General FeaturesControls and Display Top Panel ControlsSide Controls Busy UID DisplayControls and Display Front Panel Keys FCN ScanSYS RCL Dial Standard Mode A/D Standard Mode SYS System/Group Display Mode Power-Up SequenceSetting Volume Levels Basic OperationNumeric Display Mode System and Group SelectKeypad Disable Transceiver LockLTR-Net, LTR, and Conventional Operation Low Battery IndicationOption Switches Basic Operation Bank Select General FeaturesCall Indicator Receive-Only Groups Home System/Group SelectProceed Clear-To-Talk Tone Tone Select Time-Out TimerStandard Group Calls GeneralPlacing a Standard Group Call LTR-Net and LTR OperationConventional Operation Receiving a Standard Group CallTelephone Calls Placing Telephone CallsReceiving a Telephone Call Placing LTR-Net Auxiliary Calls LTR-NET Auxiliary CallsLandside-Originate Telephone Calls Receiving Auxiliary Calls Option Switches and Menu Mode Menu Mode and Option Switch FunctionsMenu Mode IntroductionMenu Mode Flowchart Introduction Dial ModeSelecting Dial Mode Storing Numbers in Memory Dialing a NumberSending the Number Recalling Numbers From Memory Exiting Dial ModePlacing Calls Without Selecting Dial Mode System and Group Scanning System and Group Scanning Scan List Programming Transmitting In The Scan Mode Scan Delay and Continue TimersSystem and Group Scanning Priority Calls LTR-NET and LTR FeaturesTransmit Inhibit LTR-Net Special Calls LTR-NET FeaturesLTR-Net Standard Calls Busy QueuingRoaming Squelch Adjust LTR FeaturesConventional Features Standard Group CallsMonitoring Before Transmitting Monitor Mode Selected Transmit Disable On BusyTalk-Around Call Guard SquelchMiscellaneous Supervisory TonesLTR-Net Special Call Tones LTR Telephone Call Tones Display MessagesMiscellaneous Menu Mode Messages Bank SEL Bank selectRechargeable Battery Pack Alpha NumericMiscellaneous Battery Charger Operation Operation At Extended Range Charger IndicatorsSpeaking Into Microphone Licensing Transceiver ServiceIndex Busy 14 Call 13 Index 002-7200-600
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