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TB9100/P25 CG Installation and Operation Manual

Troubleshooting

73

© Tait Electronics Limited January 2007

6

Troubleshooting

Check that all front and rear connectors and cables are in place, and that
power switches are on. If problems persist, contact your nearest Tait Dealer
or Customer Service Organization.

Symptom

Possible Cause

Action

Alarm LED red and steady
(not flashing)

Base station is in Standby
mode

Use CSS to put base station in Run mode

All reciter LEDs on

Digital board not
communicating with
Network board

Replace reciter module and send faulty module for
servicing

Desired feature is not
operating

Feature license missing

a) Check that you have the necessary feature

licenses (see the CSS help or User’s Manual).

b) Check the system log for messages indicating a

missing feature license

Feature license present but
feature is not enabled

Use the CSS to enable the feature.

Front panel speaker
transmits unintelligible
sounds

An encrypted P25 call is
being monitored/received

Turn speaker off or take no action: only other radios
with encryption decoder can decrypt encrypted
calls

Front panel speaker is silent
although calls are being
transmitted

An encrypted P25 call is
being monitored/received

If the console gateway has an encryption license,
the speaker remains silent when encrypted calls are
transmitted

Clear warning on transmit

This means that the base
station/console gateway
transmitted a clear and not
encrypted call

You have a non-encryption system and the clear
warning hasn't been turned off in the configuration

You are transmitting clear when you should be
transmitting encryption. This could be because:
a) your calling profile specifies an encryption key

but you don't have a basic encryption license

b) your calling profile specifies an encryption key.

That key is filled with AES key information but
you don't have an AES encryption license.

Mismatch warning on
transmit

The base station doesn't
transmit/ the console
gateway doesn't pass
signal on to the network

The calling profile specifies an encryption key, but
that key is not loaded

Mismatch warning on
receive

The base station doesn't
receive/ the console
gateway doesn't pass
signal on to the network

Use the CSS to monitor calls and check that there is
no mismatch between the received call and the
current calling profile

Tx stuck on

Tx and Rx frequencies are
the same

Reconfigure Tx and Rx with different frequencies

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Содержание P25 CG

Страница 1: ...MBA 00002 07 Issue 7 January 2007 TB9100 base station P25 CG console gateway Installation and Operation Manual ...

Страница 2: ...otected by one or more patents of Tait Electronics Limited together with their international equivalents pending patent applications and registered trade marks NZ338097 NZ508054 NZ508340 NZ508806 NZ508807 NZ509242 NZ509640 NZ509959 NZ510496 NZ511155 NZ511421 NZ516280 519742 NZ519118 NZ519344 NZ520650 537902 NZ522236 NZ524369 NZ524378 NZ524509 NZ524537 NZ524630 NZ530819 NZ534475 NZ534692 NZ535471 N...

Страница 3: ... 5 Base Station Options 15 Base Station Repeater 15 12V DC PA Only Base Station Repeater 15 Receive only Base Station 16 P25 Console Gateway 16 1 6 Base Station Applications 16 Repeater 16 Line Connected Base Station 17 Channel Group 17 Trunking Control or Traffic Channel 17 P25 Linking 17 1 7 Theory of Operation 18 Signal Paths 20 Run and Standby Modes 21 Dual Mode 21 Intermodule Communications 2...

Страница 4: ...ensor 34 Cabinet and Rack Ventilation 34 3 2 Installing and Setting up the CSS 37 Setting up CSS Access Codes 37 Minimum PC Requirements for Running a CSS 38 3 3 Unpacking and Moving the Base Station 38 3 4 Setting Up on the Bench 40 Confirming Operation 41 Setting the IP Address 42 Finding a Lost or Forgotten IP Address 43 Customizing the Configuration 44 Changing the Root Password 44 Tuning 45 C...

Страница 5: ...g the Control Panel 80 Configuring the Control Panel Board 81 7 4 Replacing a Reciter 83 7 5 Replacing a Power Amplifier 85 7 6 Replacing a Power Management Unit 87 7 7 Replacing the Front Panel Fans 88 7 8 Replacing the Module Guide Rails 91 7 9 Replacing the Subrack Interconnect Board 92 Configuring the Subrack Interconnect Board 94 7 10 Final Reassembly 97 8 Technical Description 99 8 1 Mechani...

Страница 6: ...xiliary DC Output 121 DC Input to 12V PA 122 Microphone Connection 122 Appendix B Inter Module Connections 123 5 or 50W Base Station 123 100W Base Station 124 12V PA Base Station 125 Dual Channel 5 or 50W Base Station 126 Five Reciters and One PMU 128 Seven Reciters 129 TaitNet P25 Glossary 131 ...

Страница 7: ... Module Details Channel Module means click the Monitor icon on the toolbar then in the navigation pane find the Module Details group and select Channel Module from it Within this manual four types of alerts are given to the reader Warning Caution Important and Note The following paragraphs illustrate each type of alert and its associated symbol Warning This alert is used when there is a potential ...

Страница 8: ...lems that arise The product CD includes technical notes that were available at the time of release Look for new or updated technical notes on Tait s technical support website Publication Record Issue Publication Date Description 1 July 2004 First release 2 January 2005 General updates new photographs Appendix C added 3 March 2005 General updates Appendix D added 4 August 2005 General updates for v...

Страница 9: ...ability of the base station to interoperate in both analog FM and digital P25 modes to link stations using standard Internet Protocol communications and to add features through software options ensures that P25 systems designed with the TB9100 are scalable in both size and functionality The TB9100 base station and P25 Console Gateway combine industry leading digital voice quality with rugged desig...

Страница 10: ...60 C 22 F to 140 F The following are some of the features of the P25 Console Gateway Project 25 standard DES or AES encryption and decryption at the analog line interface Support for MDC1200 E M and function tone signaling on the analog line 1 2 Base Station and Console Gateway Like the base station the P25 Console Gateway can be unpacked given an IP address set up on the bench and used with a CTU...

Страница 11: ...e PMU supplies and manages power to the whole subrack One reciter or gateway module is needed for each channel and one PA is needed for each transmit receive channel There is also a front panel with fans and a control panel The modules are interconnected at the front of the subrack External connections to the modules are located at the rear Modules come in different variants depending for example ...

Страница 12: ...he reciter in position 1 can communicate with the PMU if fitted It is not possible to convert a reciter to a gateway module Gateway Module The gateway module of the P25 Console Gateway appears identical to a base station reciter However they are electronically distinct The P25 Console Gateway has no RF capability It performs P25 encryption and decryption at the analog line which the base station i...

Страница 13: ...hich converts the 12V nominal DC input to a 28VDC output to power the PA circuit boards The boost regulator board also provides a 12VDC output to power the reciter The first 5W or 50 W PA is installed in position 3 of the subrack The second 5W or 50 W PA is installed in position 5 The 100 W PA shares a connection with the PMU to position 6 of the subrack PAs are not required in a P25 Console Gatew...

Страница 14: ...ovides some manual control of the channels in the subrack can display status information for each channel and allows the technician to make and receive calls refer to Control Panel on page 61 It is a technician tool rather than a user facility Subrack The 4U subrack is made of passivated steel and is designed to fit into a standard 19 inch rack or cabinet It is fitted with a configurable subrack i...

Страница 15: ...binations Base Station Repeater The standard TB9100 combination of modules is suitable for use as a line connected base station and as a repeater This is the typical base station configuration described in Theory of Operation on page 18 Depending on its PMU it can operate on AC power DC power or a combination of both 12V DC PA Only Base Station Repeater The TB9100 base station can be provided with...

Страница 16: ...ctionality Encrypted voice quality is indistinguishable from unencrypted The P25 Console Gateway supports Project 25 compliant DES via the basic encryption license and AES Advanced Encryption Standard with the AES license Since the control panel is another analog access point decryption at the control panel could be a point of insecurity in the system For this reason there is no encryption or decr...

Страница 17: ... act as an encryption decryption point Trunking Control or Traffic Channel TB9100 base stations can be interfaced to an external trunking site controller Under instructions from the site controller they can function as a control channel or a traffic channel P25 Linking A pair of TB9100 base stations can function as linking transceivers and be used to provide an RF link for example between a channe...

Страница 18: ...dules The control panel speaker and microphone enable the base station maintainer to communicate with the dispatcher or with subscriber unit radios The Ethernet interface carries voice over IP as well as communications with the CSS The reciter carries out signal processing and has overall control of the base station It comprises an RF a digital and a network board as shown in Figure 1 3 Figure 1 2...

Страница 19: ... processing for both analog FM and digital P25 modes The network board acts as the link between the digital circuitry and the TaitNet P25 Network and gives the base station an identity as a network element It also provides the physical connections for the Ethernet analog and RS 232 serial interfaces For more detailed information see Technical Description on page 99 Figure 1 3 Reciter boards RF I P...

Страница 20: ...a 128 kbit s digital stream Then if they are analog FM they pass through a G 711 encoder If they are digital P25 they pass through an IMBE vocoder The DSP switch then routes them to the main switch 2 The main switch handles the signals according to the reciter s configuration and role within the channel group It may vote between RF originated signals If there are multiple signals it selects or pri...

Страница 21: ... handle analog FM calls as well as digital P25 calls It is a dual mode base station However it can be configured to always operate in one mode For example if only digital P25 radios use the base station the base station can ignore analog FM calls Note that at any one time the base station can only handle one call either analog FM or digital P25 It cannot receive a call in one mode and repeat it in...

Страница 22: ...whether the signal is to be handled as digital P25 or analog FM Different calling profiles can select different modes Digital fixed station interface The DFSI receives speech signals whose mode has already been defined by the FSH The FSI is always capable of receiving calls in either mode Channel group interface The channel group interface receives speech signals whose mode has already been define...

Страница 23: ...onnect board interconnect the modules in the subrack and carry alarm and control signaling between the reciter and the other modules as shown in Figure 1 5 Figure 1 5 Intermodule communication paths I C Current Source 2 Speaker User Controls Reciter PA PMU Subrack Interconnect Board PA Fan PMU Fan Control Panel Microphone I C 2 I C 2 I C 2 Fan Fan Speaker Mic μP μP μP ...

Страница 24: ...he PMU is shut down When the battery voltage rises to the configured startup setting power is resumed to the DC supply Auxiliary Power Control If the PMU is fitted with an auxiliary power supply unit its output can be used to power other site equipment or to recharge the DC battery supply when the base station is running off the AC supply You will need to configure it to suit your requirements Pow...

Страница 25: ...tion ensures that noise and common mode interface signals are kept to a minimum between sub assemblies Various power supplies in the reciter further power and isolate critical sub sections The reciter also powers the control panel via a backpower protection diode The system control bus is used to route power from the reciter to the control panel When a reciter is powered and plugged into the contr...

Страница 26: ...round and rotation detect 3 wire fans Both fans in a subrack must be of the same type If 3 wire fans are fitted the reciter can monitor whether the fans are rotating and generate an alarm if the fan fails The control and monitoring of the fans is performed by the reciter selected at the control panel We recommend that you enable the fan alarms for reciter 1 and disable the fan alarms for the other...

Страница 27: ... the base sta tion once it has been unpacked If necessary remove the modules from the subrack before moving it refer to Replacing Modules on page 77 In all cases follow safe lifting practices Lethal Voltages Warning The PMU contains voltages that may be lethal Refer to the ratings label on the rear of the module The TB9100 base station must be installed so that the rear of the PMU is located in a ...

Страница 28: ... Proximity to RF Transmissions Do not operate the transmitter when someone is standing within 3ft 90cm of the antenna Do not operate the transmitter unless you have checked that all RF connectors are secure High Temperatures Take care when handling a PMU or PA which has been operating recently Under extreme operating conditions 140 F 60 C ambient air temperature or high duty cycles the external su...

Страница 29: ...ble This includes the use of locked cabinets and the use of seals on connectors All network and audio connectors should be sealed with the stick on type of seal The purpose of the seals is to detect unauthorized tampering The seal should reveal if any of the connectors have been unplugged or if any unauthorized equipment has been plugged in The seals must be difficult to remove without breaking an...

Страница 30: ... reserved worldwide for use by Distress Beacons Do not program transmitters to operate in this frequency range FCC Compliance This equipment complies with Part 15 Class B of 47CFR Radiated and conducted emissions and electromagnetic susceptibility specifications of the Federal Communications Commission FCC rules for the United States Operation is subject to the following two conditions a This devi...

Страница 31: ...tate tariffs Contact the state public utility commission public service commission or corporation commission for information If trouble is experienced with the XBA1PA0 Network Board in the Reciter for repair or warranty information please contact your local Tait Dealer or Customer Service Organization Only approved Tait Dealer or Customer Service Organizations equipped with the necessary facilitie...

Страница 32: ...he European Union EU and states within the European Economic Area EEA Important This product can be programmed to transmit on frequen cies that are not harmonized throughout the EU EEA and will require a licence to operate in each member state Lim itations may apply to transmitter power operating fre quency channel spacing and emission Declaration of Conformity You can download the formal Declarat...

Страница 33: ...that control panel access is restricted to authorized maintainers only in order to ensure the confidentiality of voice communications and alarm status information Grounding and Lightning Protection Electrical Ground The TB9100 base station modules are grounded by physical contact between the module case and the subrack To ensure a good ground connection you must tighten each module retaining clamp...

Страница 34: ... for the TB9100 base station is provided by the ambient air temperature sensor board b fitted to the PA control board The sensor board is inserted through slots in the control board and heatsink to be positioned between the heatsink fins Important If the sensor board is to provide accurate ambient temperature readings it must have forced airflow and must not come into contact with the metal of the...

Страница 35: ...ture entering the cabinet must not exceed 140 F 60 C If you are installing multiple subracks in a cabinet ensure that there will be enough cooling airflow through the cabinet after the equipment has been installed For example the recommended maximum number of subracks in a 38U cabinet is five as shown in Figure 3 1 on page 36 If the TB9100 base station is installed in a rack or cabinet with other ...

Страница 36: ...nd Operation Manual Tait Electronics Limited January 2007 Figure 3 1 Typical cabinet ventilation requirements b ventilation slots d airflow entry c blanking panels e airflow exit 8in 20cm 2U 7in 17 5cm side view front view top view c c d e b c c ...

Страница 37: ...at technicians do not need to change the IP address of their laptop every time they visit a different site a laptop subnet is allocated This subnet exists on all site LANs in the network but cannot be routed across the WAN All routers unless there are multiple routers on a site LAN have the same address in the laptop subnet This will be a secondary address on the routers LAN connection Each laptop...

Страница 38: ...nd bottom foam cushions To prevent personal injury and damage to the equipment we recommend that two people unpack and move the base station To remove the base station from the carton follow the procedure illustrated in Figure 3 2 Caution A TB9100 base station subrack complete with mod ules can weigh up to 62lb 28kg or up to 66lb 30kg complete with packaging We recommend that you have another pers...

Страница 39: ...way e Remove the cushion from the bottom of the base station f 4 Rotate the base station and cushion carefully over the rear of the base station g so that it is the right way up with the cushion on top h Remove the cushion from the top of the base station i Disposal of Packaging If you do not need to keep the packaging we recommend that you recycle it according to your local recycling methods The ...

Страница 40: ... configuration is the base station s IP address The base station comes with a default IP address but needs to be given the IP address required for its position in the TaitNet P25 Network Using a Calibration and Test Unit A Calibration and Test Unit CTU can be of great assistance when confirming operation and when tuning and calibrating the base station Connect the CTU to the base station or consol...

Страница 41: ...e battery supply lead is disconnected refer to Replacing a Power Amplifier on page 85 remove the front panel refer to Preliminary Disassembly on page 78 check that all looms and cables at the front and rear of the base station are fitted correctly check that all connectors are secure refit the front panel ensure that it is fitted correctly so that the fans will operate if needed refer to Final Rea...

Страница 42: ...no alarms generated the audio quality on the receiving SU if testing a base station or CTU if testing a P25 Console Gateway is good 6 When the receiving SU answers your transmission check that the green receive LED turns on the audio quality from the speaker in the control panel is good adjust the speaker volume as required Setting the IP Address Before the base station is installed on site you ne...

Страница 43: ...base station 11 Click Overwrite to confirm that you really do want to change the IP address 12 Reset the base station so that the new IP address and name take effect This disconnects the CSS 13 Wait for the base station to power up then on the toolbar click the Connect icon 14 Select the entry you added to the connection list and click Connect 15 In the status bar verify that you are actually conn...

Страница 44: ... the changes needed 8 Click File Save to save your changes and then click Program on the toolbar to program these changes into the base station Important Make sure that you save the configuration to a file This provides a backup in case the configuration information becomes lost or corrupted Changing the Root Password The root password to the Linux operating system of the network board is a possib...

Страница 45: ...be removed from the subrack to gain access to the tuning holes For full details on how to carry out the tuning procedures refer to the Calibration Software documentation These procedures require a different CTU setup Checking the Modulation Fidelity This section is for TB9100 base stations only and does not apply to P25 Console Gateways Before installation you may want to carry out a modulation fi...

Страница 46: ... the symbol frequency error is 0 5 ppm the base station has failed the test Use the Calibration Software to carry out an FCL and a VCO calibration If the base station still fails the test return it to a Tait service center To carry out an analog FM transmission test using an Agilent 8920 test set 1 Run the CSS and connect the CSS PC to the base station 2 Using an RF cable connect the PA RF output ...

Страница 47: ... clamps 0 25in or 6mm flat blade screwdriver for the fasteners used to secure the front panel to the subrack Task Instructions Listen to the analog line output Turn the switch to BALANCED and adjust the speaker volume Monitor the analog line output Connect test equipment to the LINE OUTPUT Provide test inputs on the analog line Connect test equipment to the LINE INPUT Key the transmitter via the E...

Страница 48: ...0 base station subrack complete with mod ules can weigh up to 62lb 28kg or up to 66lb 30kg complete with packaging We recommend that you have another person help you unpack and move the base station The TBAA03 16 carrying handles will make it easier to move the base station once it has been unpacked If necessary remove the modules from the subrack before moving it refer to Replacing Modules on pag...

Страница 49: ...cket TBAA03 13 auxiliary support brackets can be fitted to the rear of the TB9100 subrack to provide additional mounting security Figure 3 5 shows a standard TBAA03 13 bracket b fitted in a typical Tait cabinet c If you are not using a Tait cabinet you may have to make your own brackets to suit your installation Important You must fit the auxiliary support brackets if you intend to transport a cab...

Страница 50: ...ur M6 0 25in screws through the main mounting holes on the front of the subrack as shown in Figure 3 4 on page 48 Important The slide mounting rails are not suitable for transporting a cabinet fitted with a fully built up TB9100 base station In this case you must also fit the TBAA03 13 auxiliary sup port brackets to the upper set of rear mounting holes c support bracket not shown in diagram Genera...

Страница 51: ...should be well supported so that the terminals on the PMU and on the ends of the cables do not have to support the full weight of the cables Figure 3 7 shows two recommended methods of securing these cables to prevent straining either set of terminals Figure 3 7 DC power cabling secure the cables to the cabinet to support their weight ...

Страница 52: ...ions at the rear of a single channel base station with 5W or 50W PA are identified in Figure 3 8 External connections are all located at the rear of the subrack Figure 3 8 5W or 50W base station inputs and outputs b analog line connector h auxiliary 12VDC output c 1 pps input i AC mains input d external reference frequency input j RF input e RF output 1 Ethernet interface connector f VDC input 1 s...

Страница 53: ... be installed near the equipment and must be easily accessible This outlet should be connected to an AC power supply capable of providing at least 600W The requirements of two typical AC supplies are given in the following table Figure 3 9 5W or 50W 12V DC PA only base station inputs and outputs b analog line connector g RF input c 1 pps input h Ethernet interface connector d external reference fr...

Страница 54: ...tle capacity left You must connect the DC supply from the battery to the PMU via a fuse or Darted circuit breaker with the appropriate rating as shown in the table below The DC input leads should be of a suitable gauge to ensure less than 0 2V drop at maximum load over the required length of lead Terminate and insulate the DC input leads to protect them from accidentally shorting to the subrack if...

Страница 55: ...We recommend a screw torque of 4 5lbf in 0 5N m Base Station with no PMU or 12V PA Base stations with no 12V PA or PMU are designed to accept a DC input of 10 8 VDC to 32 VDC with negative ground The DC input terminal block is mounted on the rear of the subrack Connecting the Auxiliary DC Power Output The PMU can provide an auxiliary DC output when it is fitted with the optional auxiliary power su...

Страница 56: ...are supplied with a cable kit TBAA04 02 for TB9100 base stations and TBAA04 04 for P25 Console Gateways as shown in Figure 3 12 You can use this cable to connect the auxiliary power output to another device The other socket is designed for TB8100 base stations Generally you will need to replace it with a socket suitable for your device Connecting RF Important Do not remove the load from the PA whi...

Страница 57: ...ipment connected to the TB9100 base station for defects Ice on the antenna or a broken antenna is unlikely to cause damage to the PA There should be enough coaxial cable between the antenna and PA to protect it from high VSWR 5W PAs will not fail due to a highly mismatched load They do not use the MRF9060 device Explanation Most base station manufacturers have adopted 28V LDMOS technology to benef...

Страница 58: ...be configured as the relay driver Important The the isolation of this relay must be 40dB The relay closing time must be 20ms Tait offers an Antenna Relay Kit which comes complete with installation instructions 402 00041 01 Connecting the Ethernet Line The RJ 45 socket labeled ETH provides the 10BASE T Ethernet connection to the other devices in the network Use Cat 5 cable to connect the ETH RJ 45 ...

Страница 59: ...fferent functions select the function you want using the CSS Digital inputs and outputs require Task Manager programming before they are operational Refer to the CSS documentation for further information The D range is used for general purpose inputs and outputs and also as an RS 232 serial port for example during tuning and calibration Each pin has only one function so using the D range as a seri...

Страница 60: ...60 Installation TB9100 P25 CG Installation and Operation Manual Tait Electronics Limited January 2007 ...

Страница 61: ...tons and indicator LEDs on the control panel are shown in Figure 4 1 They allow some manual control over the base station and monitoring of its operational status The microphone and speaker allow the maintainer to monitor voice traffic communicate with the dispatcher and with SU users Figure 4 1 Operating controls on the control panel b channel button and LEDs g alarm LED c speaker button and LED ...

Страница 62: ...r the currently selected reciter The green speaker LED indicates the type of speaker output Refer to Speaker Operation on page 63 Speaker Volume Button Controls the volume of the speaker mounted behind the control panel Rotate clockwise to increase the volume and anticlockwise to decrease the volume Speaker The control panel is fitted with a 0 5W speaker Audio from the base station can be connecte...

Страница 63: ...phone transmission The associated microphone LED indicates the type of speech mode Refer to Microphone Operation on page 64 for more information Speaker Operation The speaker can monitor the switch output or the RF signal received by the base station Listening to the switch output lets you have a conversation with the dispatcher or with SU users at other base stations in the channel group The spea...

Страница 64: ...rol panel microphone allows the maintainer to talk to the dispatcher and to SU users on the network This can be done in digital P25 or analog FM mode This section describes how to set the speech mode for the call For detailed information about making a control panel call refer to Making Test Transmissions on page 42 To set the mode for the control panel microphone 1 Use the CH button to select the...

Страница 65: ...e network link and the status of voting 4 3 Monitoring Front Panel Fan Operation When you turn a base station on the PA and PMU fans should turn on and then off Check that this happens to make sure that the fans are working In an operational base station you can test that the PA and PMU fans are working by requesting the base station to turn them on This is done using CSS diagnostic forms and is r...

Страница 66: ...he reciter indicator LEDs are located on the front and on the rear Front View The indicator LEDs on the front are visible through a slot in the front panel These LEDs provide the following information about the state of the reciter steady green the reciter is powered up flashing red one or more alarms have been generated you can use the CSS to find out more details about the alarms Figure 4 2 Indi...

Страница 67: ...work activity LED is lit when the Ethernet interface is connected When network activity is detected the LED will flash on for 1 second and off for 1 second Network Board PowerPC LED The green network board PowerPC LED will flash continuously when the PowerPC is functioning normally Network Board DSP LED The amber network board DSP LED will flash continuously when the DSP is functioning normally Fi...

Страница 68: ... These LEDs provide the following information about the state of the PA steady green the PA is powered up flashing green the PA has no application firmware loaded you can use the CSS to download the firmware flashing red one or more alarms have been generated you can use the CSS to find out more details about the alarms Figure 4 4 Indicator LEDs on the PA b indicator LEDs b 5 50W PA 100W PA ...

Страница 69: ...om the PMU on and off It is recessed to prevent the DC module being accidentally switched off thus disabling the battery back up supply Note that this switch disables only the control circuitry the DC input is still connected to the power circuitry Warning These switches do not totally isolate the internal circuitry of the PMU from the AC or DC power supplies You must disconnect the AC and DC supp...

Страница 70: ...e LEDs provide the following information about the state of the PMU steady green the PMU is powered up flashing green the PMU has no application firmware loaded you can use the CSS to download the firmware flashing red one or more alarms have been generated you can use the CSS to find out more details about the alarms ...

Страница 71: ... drift after 3 months service and annually thereafter If the drift is 0 5 ppm adjust the carrier frequency offset For details see the Calibration Software documentation Check the modulation fidelity from time to time or if you suspect a degradation in sensitivity on the downlink For instructions see Checking the Modulation Fidelity on page 45 PA There are no special maintenance requirements for th...

Страница 72: ...72 Maintenance TB9100 P25 CG Installation and Operation Manual Tait Electronics Limited January 2007 ...

Страница 73: ... speaker is silent although calls are being transmitted An encrypted P25 call is being monitored received If the console gateway has an encryption license the speaker remains silent when encrypted calls are transmitted Clear warning on transmit This means that the base station console gateway transmitted a clear and not encrypted call You have a non encryption system and the clear warning hasn t b...

Страница 74: ...tation appears to make random transmissions CWID feature enabled No action CWID transmissions are made according to configuration settings Supplementary services don t work Features and permissions have not been enabled correctly Check service profiles The service profile attached to the channel enables supplementary services on the RF receiver The service profile attached to the calling profile e...

Страница 75: ...n 1 Check the cable carrying digital inputs 2 Try to avoid Task Manager tasks that trigger when digital inputs float high Base station performs Task Manager actions unexpectedly and no longer responds to digital inputs Lost or forgotten base station IP address 1 Connect your PC to the 9 pin serial connector on the back of the reciter 2 Run a program such as HyperTerminal Teraterm or minicom 3 Sele...

Страница 76: ...76 Troubleshooting TB9100 P25 CG Installation and Operation Manual Tait Electronics Limited January 2007 ...

Страница 77: ...U and PA modules have built in protection mechanisms to prevent damage from overheating 7 1 Saving the Base Station s Configuration Before replacing a module in the TB9100 base station you should decide whether you need to save its configuration data If you are unsure whether you have a record of the configuration use the CSS to read the base station and save the configuration file before removing...

Страница 78: ...e corrupted data to be present on the bus when the reciter reads the states of the switches on the control panel This in turn may result in random actuations of microphone PTT carrier or speaker key causing the base station to transmit or the speaker to be actuated incorrectly Important Before removing a PA disconnect the DC input and RF input first followed by the RF output and DC output on the 1...

Страница 79: ...ner at each end of the front panel b with a quarter turn anti clockwise 2 While supporting the left end of the front panel place your fingers in the recess provided on the left side of the control panel opening c and pull the right end of the front panel away from the subrack You will need to overcome the resistance of the spring clip securing the front panel to the control panel b c d e f PMU 12V...

Страница 80: ...plug d on the subrack 4 Pull the control panel down e to disengage the center tab f from the subrack Refitting Before fitting the new control make sure that it has been configured according to your requirements See Configuring the Control Panel Board on page 81 1 Fit the top of the control panel to the subrack so that the center tab is behind the lip of the subrack and between the two locating tab...

Страница 81: ...llows you to select the color displayed by the seven channel LEDs refer to the examples below This link selects the color for all the channel LEDs Note The following diagram shows the bottom side of the board as seen with the board mounted in the control panel chassis J300 is mounted on the top side of the board and is accessible from the top of the control panel assembly Examples of LED Colors Ex...

Страница 82: ...alid signal The link settings described above are the TB9100 factory default settings Example 2 With the following link settings subrack interconnect board links set for alarm status signal see Configuring the Subrack Interconnect Board on page 94 control panel board link across pins 2 and 3 the channel LEDs will have the following states green indicates which is the currently selected reciter cha...

Страница 83: ...nd remove it Note The DC output connector on the subrack interconnect board for reciter 2 is located in front of reciter 3 You will need to discon nect reciter 2 s power cable from the subrack board before remov ing reciter 3 4 Loosen the screw securing the retaining clamp h and rotate the clamp through 90 to clear the module 5 Slide the reciter out of the subrack taking care not to damage any of ...

Страница 84: ... cables simply pull the front of the cable retaining clip down and then slide it out from the subrack until it reaches the end of its travel 3 Tighten the nut on the SMA connector to a torque of 8lbf in 0 9N m 4 Refit the control panel as described in Replacing the Control Panel on page 80 5 Carry out the instructions in Final Reassembly on page 97 ...

Страница 85: ...ntrol Panel on page 80 2 At the front of the PA unplug the DC input cable DC output cable on the 12V PA b and the RF input cable c and move both cables to one side Unplug both ends of the system control bus loom d and remove it 3 At the rear of the PA unplug the RF output cable 12V PA only also unplug the battery supply lead 4 Loosen the screw securing the retaining clamp s e and rotate the clamp ...

Страница 86: ...sure the front panel cables are retained by the cable retaining clips in the top of the subrack Note If you need to remove any front panel cables simply pull the front of the cable retaining clip down and then slide it out from the subrack until it reaches the end of its travel 5 Tighten the nut on the SMA connector to a torque of 8lbf in 0 9N m 6 If necessary refit the control panel as described ...

Страница 87: ...lear the module 4 Slide the PMU out of the subrack taking care not to damage any of the cables Refitting 1 Slide the replacement PMU into the subrack and secure it with the retaining clamps 2 Reconnect all the front and rear panel cables previously disconnected Connect the DC power cables on the rear panel as shown in Figure 3 7 on page 51 Tighten the screws to a torque of 18 20lbf in 2 2 25N m En...

Страница 88: ...e duct g and remove the fan Refitting 1 Fit the replacement fan into the duct with the power wires located in the slot in the side of the duct h 2 Refit the four screws securing the fan into the duct Do not overtighten these screws or you will distort the fan body 3 PMU Fan a Refit the PMU fan duct assembly onto its mounting bosses Note that the two inner mounting tabs i fit over the bosses b Plug...

Страница 89: ... fan will be activated when a module needs cooling The module may then fold back and shut down When you power up the TB9100 check that the PMU fan runs first followed by the PA fan Each fan will run for about five seconds Important You must refit the correct duct to the PA fan There are several small but important differences between the duct for a 5W or 50W PA and the duct for a 100W PA Refer to ...

Страница 90: ...stallation and Operation Manual Tait Electronics Limited January 2007 Figure 7 1 Replacing the front panel fans b c d e f h h g i j 1 1 1 PA fan PMU fan PA fan PMU fan PA fan connector PMU fan connector 100W base station front panel shown ...

Страница 91: ... clear of the slots 2 Top Rails a Insert a small flat blade screwdriver under the rear end of the guide rail and lift it slightly d This will ensure the small locking tab is clear of the slot in the subrack b Whilst holding the rear end of the guide rail up pull the guide rail towards the rear of the subrack e and lift it clear of the slots Refitting 1 Bottom Guide Rails a With the locating hooks ...

Страница 92: ...ssembly on page 78 and remove the control panel as described in Replacing the Control Panel on page 80 2 Disconnect any system control bus cables and DC power cables from the interconnect board 3 Remove the M3 nuts and spring washers b securing the right end of the board to the subrack 4 Remove the two retaining clamps c securing the left end of the board 5 Remove the board Refitting 1 If previous...

Страница 93: ...TB9100 P25 CG Installation and Operation Manual Replacing Modules 93 Tait Electronics Limited January 2007 Figure 7 2 Replacing the subrack interconnect board d bx3 e c ...

Страница 94: ...itions 3 5 and 6 are affected Subrack positions 1 2 4 and 7 are for reciters only and require no switch settings The following table gives the switch settings for reciters PAs and for the PMU Subrack Position Switch Number Switch Settings for Reciter Switch Settings for PA Switch Settings for 12V PA Switch Settings for PMUa 3 S2 1 S2 2 S2 3 S2 4 OFF OFF ON ON ON ON OFF OFF ON ON OFF OFF 5 S3 1 S3 ...

Страница 95: ...lation and Operation Manual Replacing Modules 95 Tait Electronics Limited January 2007 S4 J23 S3 J22 S2 J20 J21 J18 J19 S1 J16 pin 1 reciter 1 reciter 2 reciter 3 reciter 4 reciter 5 reciter 6 or PMU reciter 7 or PA or PA ...

Страница 96: ...larm or Rx gate status signal to the appropriate channel LED on the control panel refer to Control Panel on page 61 Note There is a link on the control panel board which allows you to select the color displayed by these LEDs Refer to Configuring the Control Panel Board on page 81 Table 1 Link settings for selecting alarm or Rx gate signals Subrack Position Link Link Settings 1 J16 alarm status sig...

Страница 97: ...tem control bus Do not try to fit this front panel to a 100W base station or you will damage these cables and possibly the front panel itself 100W Front Panel Do not fit this front panel to a 5W or 50W base station The presence of the cut outs and absence of the break off tab will allow air to escape and reduce the velocity of air directed through the heatsink 1 Before fitting the front panel ensu...

Страница 98: ...orizontally then press the fastener in and turn to lock 3 Before powering up the base station check that all power RF and system cables are connected correctly and securely at the rear of the base station Important When refitting modules make sure they are fitted correctly into the subrack and all retaining clamps are securely tightened The recommended torque for the retaining clamp screws is 17lb...

Страница 99: ...n Subracks must have a reciter in posi tion 1 for correct operation Note Figure 8 1 shows the cooling fans and their ducts detached from the front panel only for the clarity of the illustration The cooling fans and ducts are normally screwed to the rear of the front panel Figure 8 1 Mechanical assembly front panel fans and control panel b front panel i airflow separator c PMU fan j cable retaining...

Страница 100: ...e center of the subrack This positions the cooling fins directly behind the PA fan The airflow separator is fitted directly beside the PA to help direct the cooling airflow through the heatsink Note The configuration for 12V base stations is the same as shown in Figure 8 1 but the PMU and its cooling fan are not fitted Figure 8 2 below shows the configuration for a typical 100 W base station Note ...

Страница 101: ...s one for narrow bandwidth and one for wide bandwidth The appropriate filter is selected by software controlled PIN switches according to the bandwidth selected in the CSS The signal is finally passed to the ADC analog to digital converter in the digital receiver via an anti alias filter Receiver RF UHF Reciter The incoming RF signal is fed through a band pass filter followed by a simple low pass ...

Страница 102: ...igital board DSP operates under the control of the RISC to provide a number of functions including demodulating incoming FM signal and identifying whether it is P25 digital or analog FM modulating an RF signal from a P25 digital or analog FM signal received from the network analog line or microphone implementing the control panel interface transmitting and receiving speech samples to and from the ...

Страница 103: ...supply The power supply on the digital board provides 3 3V and 5 3V regulated supplies It is also fed through to provide a 2 5V supply The network board requires the internal supply voltages of 6 V 3 3 V 1 8 V and 1 6 V These are all derived from the main 28 V supply rail the 3 3 V and 1 8 V supplies are acquired from the 28 V supply using a dual phase switching converter the 1 6 V supply is acqui...

Страница 104: ... Supply Power Supply RISC DSP RISC 13MHz Clock RISC CODECs IF 12 8MHz Ref RF I P 28VDC I P 28V 28V RF O P PA Key Audio System Control Bus Digital Receiver Control Communications Control Communications Control Communications Host Port Interface Host Port Interface Modulation Frequency Control Control Communications External Reference Frequency if used RF Board Digital Board Power Supply Network Boa...

Страница 105: ...ctional coupler board In the 50W model the output from the 6W driver board is fed to one 60W final board and then to the LPF directional coupler board In the 5W model the output from the 6W driver board is fed directly to the LPF directional coupler board Control Circuitry The microprocessor located on the control board monitors and controls the operation of the PA There are no manual adjustments ...

Страница 106: ...ttery control circuit This output is fed to the reciter which operates from 12VDC instead of the standard 28VDC provided when a PMU is used The output from the DC input filter is also fed to the power stage where the voltage is boosted to 28VDC and is then fed through an output filter to provide the 28VDC output for the PA circuit boards The battery control circuitry monitors the DC input voltage ...

Страница 107: ...oard Low Pass Filter Directional Coupler Board RF I P PA Key RF O P 28VDC I P DC DC DC RF RF RF RF RF RF Control Monitor Control Monitor Control Monitor System Control Bus 100W 28V PA 6W Board Control Board Boost Regulator 60W Board Ambient Air Temperature Sensor Board Low Pass Filter Directional Coupler Board RF I P PA Key RF O P 12VDC I P 12VDC O P Reciter DC 28VDC 28VDC RF RF Control Monitor Co...

Страница 108: ...trol card The microprocessor is also located on the HVDC control card The microprocessor is used by both the AC and DC modules and is fitted to all PMU models The leaded high power components are situated on the AC converter board while the plug in cards have only SMD control components DC Module The DC module accepts an input of 12 24 or 48VDC nominal The input is fed through the DC input filter ...

Страница 109: ...tery capacity is low it will maintain the power supply to the microprocessor and shut down the rest of the PMU Refer to Power Management on page 24 for further details Figure 8 5 PMU high level diagram PFC Circuitry PFC Control Card DC Input Filter Card DC Control Card Auxiliary Power Supply Board Battery Control Card Standby Power Supply Card HVDC Control Microprocessor Card HVDC Circuitry DC Con...

Страница 110: ...tored by the microprocessor The software also automatically detects the PMU configuration and controls the PMU accordingly If any of the monitored conditions exceeds its normal range of values the microprocessor will generate an alarm and take appropriate action depending on the configuration of the PMU The alarms and diagnostic functions are accessed through I2 C bus messages on the system contro...

Страница 111: ... 8 1 PMU indicator LED states Green Red PMU condition off off power off input above or below safe operating range flashing 3 Hz off no application firmware loaded use the CSS to download the firmware on off the microprocessor is operating no alarm detected on flashing 3 Hz one or more alarm conditions indicated output is overvoltage output is undervoltage output is current limiting overtemperature...

Страница 112: ...age Overvoltage Shutdown HW Undervoltage Shutdown HW Overvoltage Shutdown Reset HW High Battery Voltage Alarm SW Alarm Low Battery Voltage Alarm SW Alarm Startup Voltage SW Shutdown Voltage SW Startup Voltage HW Run Run Stop Stop Active Active Off Off Software Control Hardware Combined Hardware Behaviour Software Alarm Low Battery Voltage Software Alarm High Battery Voltage 30s delay 30s delay 30s...

Страница 113: ...e the need for low voltage disconnect modules a The information in this table is extracted from the TB9100 Specifications Manual Refer to the latest issue of this manual MBA 00014 xx for the most up to date and complete PMU specifications b Using the CSS c Only available if the standby power supply card is fitted Table 8 2 PMU DC voltage limitsa Parameter Voltage Range 12V PMU 24V PMU 48V PMU User...

Страница 114: ...ate the currently selected reciter They also provide real time status information for any reciter installed in the subrack Any reciter can update in real time the channel LEDs to display one of two possible reciter status signals Rx gate alarm Links on the multi reciter subrack interconnect board allow you to choose which status signal either Rx gate or alarm is connected to the channel LEDs Links...

Страница 115: ...eaker audio and power for the control panel are common signals for all reciters in the subrack The remaining signals microphone audio I2C mess ages and fan power are switched so that only one reciter is connected to the control panel at a time This switching takes place on the subrack inter connect board and is controlled by the channel button on the control panel Figure 8 8 shows signal paths and...

Страница 116: ...ck diagram 5HFLWHU KDQQHO 6HOHFW 6ZLWFK WR HFRGHU ULYHU WR HFRGHU ULYHU 6ZLWFKHG 6LJQDOV 56 0LFURSKRQH XGLR 5HFLWHU 5HFLWHU 5HFLWHU 5HFLWHU 5HFLWHU 5HFLWHU RXQWHU DQG QFRGHU XUUHQW 6RXUFHV 3RUW SDQGHU 6WDWXV V 6HOHFWHG V 6XEUDFN RDUG RQWURO 3DQHO 6ZLWFKHG 6LJQDOV L HG 6LJQDOV 6SHDNHU XGLR DQ 3RZHU RQWURO 3DQHO 3RZHU L HG 6LJQDOV Microphone Audio I 2 C ...

Страница 117: ...ected from the bus the PA not detected alarm is generated in the reciter however transmission still takes place because the transmit RF and key signals are transmitted from the reciter to the PA via the interconnecting coaxial cable the PA is unable to turn on its fan Depending on the ambient temperature at the site and the transmit duty cycle this could allow the PA to heat up to the point where ...

Страница 118: ...ground signals for the PA and PMU fans are routed from the modules to the front panel via the control panel along the system control bus These signals are electrically isolated from all other system signals to ensure fan noise is not transferred to other sensitive system components Although the PA and PMU modules provide the power and ground for their respective fans the fan rotation detection is ...

Страница 119: ...allel interconnection between all connectors on the board The following table gives the pin allocations for the IDC connectors to the reciter PA and PMU and for the D range connector to the control panel Signal Reciter PA PMU IDC Pin Control Panel D range Pin I2C interrupt not used 1 8 I2C data 2 15 ground I2C 3 no connection I2C clock 4 7 28V control panel power 5 14 RS 232 Tx data 6 6 ground con...

Страница 120: ...120 Technical Description TB9100 P25 CG Installation and Operation Manual Tait Electronics Limited January 2007 ...

Страница 121: ...ction Digital Interface Connection PMU Auxiliary DC Output The pin allocations for the auxiliary DC output on the PMU are given in the following table Pin Description 1 E M signaling input 2 E M signaling input 3 audio output 4 audio output 5 audio input 6 audio input 7 E M signaling output 8 E M signaling output 1 2 3 4 5 6 7 8 front view Pin Description 1 transmit output 2 transmit output 3 rece...

Страница 122: ...ow Microphone Connection The pin allocations for the microphone socket are given in the following table Pin Description 1 V output 2 ground 2 pin connector rear view b c Pin Description 1 V output 2 ground 2 pin connector rear view b c Pin Description 1 not connected 2 not connected 3 not connected 4 PTT 5 voice band microphone input 6 microphone ground 7 not connected 8 not connected 1 2 3 4 5 6 ...

Страница 123: ...the reciter fans to ensure an adequate air supply 5 or 50W Base Station The connections between modules at the front of a 5 or 50W base station are shown below 5 or 50W base station internal connections b 28VDC high current output for PA f DC output for reciter fan c 28VDC low current output for reciter obscured g system control bus d RF output to PA h 28VDC high current input cable from PMU e 28V...

Страница 124: ... reads the states of the switches on the control panel This in turn may result in random actuations of microphone PTT carrier or speaker key causing the base station to transmit or the speaker to be actuated incorrectly Note The above illustration is an example of a 100W base station with two reciters However the second reciter is not a requirement of a typical 100W base station 100W base station ...

Страница 125: ...Limited January 2007 12V PA Base Station The connections between modules at the front of a 12V PA base station are shown below 12V PA base station internal connections b RF output to PA e system control bus c 12VDC input from PA f RF input from reciter d DC output for reciter fan d b f c 12V PA reciter e e ...

Страница 126: ...wn below 5 or 50W base station internal connections b 28VDC high current output for PA 1 h DC output for reciter fan c 28VDC low current output for reciters obscured i system control bus d RF input from reciter 2 j 28VDC high current input cable from PMU e RF output to PA 2 1 RF input from reciter 1 f 28VDC low current input from PMU 1 28VDC high current output for PA 2 g RF output to PA 1 b c i h...

Страница 127: ...ronics Limited January 2007 Special care should be taken when connecting the power cable from the PMU to PA 2 The cable should be shaped in such a way that it does not come into contact with the subrack interconnect board Refer to the diagram below for more detail Detail of cabling from PMU to PA 2 ...

Страница 128: ...h five reciters are shown below The following diagram shows the subrack interconnect board connections for this configuration 5 or 50W base station internal connections b 28VDC high current output to subrack interconnect board d DC output for reciter fan c 28VDC low current input from subrack interconnect board e system control bus b c e d c c reciter 4 PMU reciter 2 e d e reciter 3 reciter 5 d d ...

Страница 129: ...e shown below The following diagram shows the subrack interconnect board connections for this configuration 5 or 50W base station internal connections b 28VDC high current input from DC input terminal block d DC output for reciter fan c 28VDC low current input from subrack interconnect board e system control bus b c e d c c reciter 4 reciter 2 e d e reciter 3 reciter 5 d d e e e c reciter 1 d reci...

Страница 130: ...130 Appendix B Inter Module Connections TB9100 P25 CG Installation and Operation Manual Tait Electronics Limited January 2007 ...

Страница 131: ...he RF interface transmits and receives analog FM signal The network element s channel group interface sends and receives the analog signal as G 711 speech packets analog valid Analog valid is a signal that indicates that the TB9100 base station or P25 Console Gateway is presenting a valid output on the analog line This output can originate from an analog FM or from a digital P25 call The M line ca...

Страница 132: ...age The BER indicates the proportion of errors to correctly received digits in a received signal C C4FM Compatible Four level Frequency Modulation A modulation scheme defined in the P25 CAI standard for 12 5 kHz bandwidth CAI Common Air Interface The over the air data formats and protocols defined by the APCO P25 committee Calibration Software The TB9100 Calibration Software is a utility for defin...

Страница 133: ...is a named group of configuration settings that help to define the properties of a channel Each channel in the channel table must have a channel profile assigned to it channel seize Channel seize is a signal received at the analog line interface requesting the base station or P25 Console Gateway to accept the signal on the analog line as an input into the channel group An asserted E line LLGT or L...

Страница 134: ... Conventional networks are systems that do not have centralized management of channel access System operation is entirely controlled by system end users CRTP Compressed RTP crypto module Module for securely storing encryption keys and for encrypting and decrypting signals CSS Customer Service Software Tait PC based software for monitoring configuring and diagnosing a Tait TB9100 base station or P2...

Страница 135: ...B9100 base station computes from the state of a configured number of digital inputs The digital input value is an input into Task Manager digital P25 mode A mode of operation in which the RF interface transmits and receives digital signal as defined by the APCO P25 CAI The digital line sends and receives IMBE speech packets dispatcher A dispatcher is a person who gives official instructions by rad...

Страница 136: ... Communications Commission The FCC is an independent United States government agency that regulates interstate and international radio communications Feature Code Code that identifies a software feature license that can be enabled or disabled using the Software Feature Enabler Feature Code Sequence Number Number that indicates how many times a software feature license has been enabled or disabled ...

Страница 137: ...B9100 base station is in analog FM mode G 711 speech is sent and received on the channel group interface gating Gating is the process of opening and closing the receiver gate When a valid signal is received the receiver gate opens letting the signal through group call A group call is a call that is sent to more than one SUs simultaneously H heartbeat message A message whose purpose is to indicate ...

Страница 138: ...nal quality inbound Inbound describes the direction of a signal from a subscriber unit over the air interface to the fixed station inhibit A control command that can be sent across the CAI to inhibit a SU An inhibited SU appears to the user as if it is powered off IP Internet Protocol IP is a protocol for sending data packets between hosts isolator An isolator is a passive two port device which tr...

Страница 139: ...sts will all accept packets with this IP address mute A mute prevents audio from being passed to the radio s speaker N NAC Network Access Code The 12 most significant bits of the network identifier information that precedes every packet sent on the CAI The NAC identifies which network the data belongs to allowing base stations and mobiles to ignore packets belonging to interfering networks NAT NAT...

Страница 140: ...equirements endorsed by the TIA and intended for digital public safety radio communications systems P25 Console Gateway A Tait network element that acts as a gateway between an analog dispatch console and a channel group PA The PA power amplifier is a base station module that boosts the exciter output to the required transmit level packet domain The speech processing area that deals with speech da...

Страница 141: ...terface reciter The reciter is a module of a TB9100 base station that provides both receiver and exciter functionality repeater talkaround Repeater talkaround allows the SU user to bypass repeater operation and so communicate directly with other SUs While repeater talkaround is active all transmissions are made on the receive frequency programmed for the channel reverse tone burst Reverse tone bur...

Страница 142: ...a ratio selective squelch A type of squelch operation in which the receiver unmutes only on signals that are explicitly addressed to that receiver This can be done through a talk group ID or unit ID digital P25 or through MDC1200 signaling analog FM sensitivity The sensitivity of a radio receiver is the minimum input signal strength required to provide a usable signal signaling profile A signaling...

Страница 143: ...ge of audible frequencies The TB9100 base station supports CTCSS and DCS subaudible signaling subtone A subtone subaudible signaling tone is a CTCSS tone or a DCS code supplementary service A term used in the P25 standards It refers to a group of services that is additional to the basic service that a telecommunications network provides Examples include encryption and SU monitoring switching range...

Страница 144: ... operating over IP for the exchange of channel control messages between a TB9100 base station and a trunking site controller TCP Transmission Control Protocol A complex protocol on top of IP for sending reliable streams of data with flow control TELCO Telephone company TIA Telecommunications Industry Association toggle The term toggle is used to describe the switching between two states If somethi...

Страница 145: ... network voting Voting is the systematic sampling of a group of channels for the channel with the greatest signal strength Voting provides wide area coverage and ensures that as the user moves throughout the coverage area the strongest channel is always available for a call VPN Virtual private network A private communications network used to communicate confidentially over a non private network VS...

Страница 146: ...146 TaitNet P25 Glossary TB9100 P25 CG Installation and Operation Manual Tait Electronics Limited January 2007 ...

Страница 147: ...ICATE MODIFY REVERSE COMPILE OR REVERSE ASSEMBLE ANY SOFTWARE OR FIRMWARE IN WHOLE OR PART Important Notice THE SOFTWARE OR FIRMWARE MAY CONTAIN OPEN SOURCE SOFTWARE COMPONENTS OPEN SOURCE COMPONENTS OPEN SOURCE COMPONENTS ARE EXCLUDED FROM THE TERMS OF THIS AGREEMENT EXCEPT AS EXPRESSLY STATED IN THIS AGREEMENT AND ARE COVERED BY THE TERMS OF THEIR RESPECTIVE LICENCES WHICH MAY EXCLUDE OR LIMIT A...

Страница 148: ...AND TAIT S SOLE AND TOTAL LIABILITY FOR ANY SUCH CLAIM SHALL BE LIMITED AT THE OPTION OF TAIT TO THE REPAIR OR REPLACEMENT OF THE SOFTWARE OR FIRMWARE OR THE REFUND OF THE PURCHASE PRICE OF THE SOFTWARE OR FIRMWARE General THE LICENSEE CONFIRMS THAT IT SHALL COMPLY WITH THE PROVISIONS OF LAW IN RELATION TO THE SOFTWARE OR FIRMWARE Law and Jurisdiction THIS AGREEMENT SHALL BE SUBJECT TO AND CONSTRU...

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