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61280003L2-1B

TRACER 2xT1 User’s Manual

Preliminary

Содержание TRACER 2xT1

Страница 1: ...A and 4280TRACERT1L9 B FCC ID HDCTRACERL9 Instruction Manual The following pages contain a preliminary copy of the User s Manual for the TRACER ADTRAN Inc respectfully requests that this information be withheld from public inspection ...

Страница 2: ...TRACER 2xT1 User s Manual 61280003L2 1B Preliminary TRACER 2xT1 User s Manual ...

Страница 3: ...61280003L2 1B TRACER 2xT1 User s Manual Preliminary ...

Страница 4: ...er to meet FCC emission limits and also to prevent interference with nearby radio and television reception when using the AC voltage adapter It is essential that only the Adtran provided power cord be used FCC Output Power Restrictions The FCC does not require licensing to implement this device However the FCC has established restrictions regarding maximum output power and the adjustments required...

Страница 5: ...er place radio frequency hazard warnings signs on the barrier that prevents access to the antenna Prior to installing the antenna to the RFC output make sure the power is adjusted to the settings specified in section 2 of this manual During antenna installation be sure that power to the TRACER equipment is turned off in order to prevent any energy presence on the coaxial connector During installat...

Страница 6: ...quence 2 Coding 2 Channel Selection 3 Forward Error Correction 3 T1 Operation 3 Framing 3 Line Code 4 DS1 DSX 1 Interface 4 Line Buildout or LBO 4 TRACER System Configuration 4 Baseband Processor or BBP 4 DS1 DSX 1 Interface 5 VT 100 RS 232 Interface 6 Alarm Contacts 6 IF Signal 6 Power 6 Controls and Indicators 6 Non Volatile Memory 8 Built In Tests 8 Radio Frequency Convertor or RFC 8 Antenna 10...

Страница 7: ...uirements 13 Grounding 13 DS1 DSX 1 Interface 14 Link Planning 15 Antenna Feedline Loss 15 Antenna Gain 15 Path Loss 16 Path Availability 16 Setting the Transmitter Power 17 2 4 GHz 1 Watt Transmitter Option 17 Setting the RFC Frequency Plan on Non 1 Watt 2 4 GHz Models 18 Setting the RFC Frequency Plan on 5 8 GHz Models 19 Directions for Changing the Frequency Plan on the Rack Mount RFC 20 Direct...

Страница 8: ...em Connection 23 Telemetry Byte Oriented Serial Interface 23 RF Down System Status 28 Cable Connections 28 Password 28 Main Menu Selections 29 System Status Page 29 Main Menu Page 30 T1 Status Page 30 Link Performance History 31 Channel A Statistics Page 31 Channel B Statistics Page 32 Alarm Page 32 Test Menu 33 Configuration Menu 34 Remote Access 35 Section 4 Troubleshooting General 37 Problem De...

Страница 9: ...lit or blinking 41 TST light is lit after pressing Remote Test button 41 Fail light is lit after pressing Remote Test button 42 RF Low light is on 42 Troubleshooting Using the VT 100 User Interface 43 RED Alarm 43 BLV Alarm 43 YEL AIS Alarm 44 RF Link Alarm or Code Sync Alarm 44 Carrier Sync Alarm or T1 Mux Framer Alarm 45 ES Values in T1 Status Menu 46 SES Values in History Menu 46 Section 5 Spec...

Страница 10: ...ental 48 Power 48 Section 6 Warranty Ordering and Return Information Warranty 49 Sales 49 Repairs and Returns 49 Technical Support 49 Glossary Acronyms Used in This Manual 51 Appendix A Cable Connections Terminal Connection DB25 A 1 Personal Computer Connection DB9 A 1 Modem Connection DB25 A 2 ...

Страница 11: ...RFC Function Block Diagram 9 1 10 Mastmount RFC Housing 10 1 11 Rackmount RFC Housing 10 2 1 2 4 GHz Diplexer 18 2 2 5 8 GHz Diplexer 19 3 1 Rear Panel Connectors 24 3 2 System Status Page 28 3 3 System Status Page 29 3 4 Main Menu Page 30 3 5 T1 Status Page 30 3 6 Link Performance History Page 31 3 7 Channel A Statistics Page 31 3 8 Channel B Statistics Page 32 3 9 Alarm Page 32 3 10 Test Menu 33...

Страница 12: ...s service providers such as BOCs Bell Operating Companies and Interexchange Carriers IEC for equipment installed in their switching offices NEBS defines everything from fire spread and extinguish ability test to Zone 4 earthquake tests thermal shock cyclic temperature mechanical shock and electro static discharge TRACER is NEBS Level 3 compliant see Table 1 1 for a list of testing requirements Tab...

Страница 13: ...ds the signal by mixing the data with the output of a pseudorandom number generator which changes state at a rate higher than the data rate This rate is called the chipping rate The TRACER chipping rate is twelve times the data rate Coding Many different pseudorandom sequences exist The sequences are called pseudorandom because although they appear noise like they are determinant and repeat after ...

Страница 14: ...wo plans are called Plan A and Plan B One end of a path will be on Plan A and the other will be on Plan B Shipment of a link will consist of an A and a B unless otherwise specified FORWARD ERROR CORRECTION With the addition of overhead data error detection and correction capability can be added to a data stream Error correction can be accomplished by allowing the receiver to request the re transmi...

Страница 15: ... and Rx pairs to meet the connecting arrangement of a network interface device This cable is included with the BBP and is labelled T1 Crossover Line Buildout or LBO The DS1 DSX 1 interface provides two different types of line buildouts LBOs respectively When set for DS1 LBOs for 0 dB 7 5 dB 15 dB and 22 dB are available The DS1 interface can operate on line lengths up to 6 000 feet When set for DS...

Страница 16: ...s the RJ 48C connector from the circuit The DS1 DSX 1 interface can operate on line lengths up to 6000 feet When connecting either T1 interface to the public switched network an ADTRAN provided cross over cable part number 3125M011 A is required to meet FCC part 68 and IC CS03 requirements This cable is included with the BBP and is labelled T1 Crossover This cable is required to cross over the TX ...

Страница 17: ...ave continuity while under alarm conditions these contacts are open IF Signal The N type connector on the rear panel provides the interface point between the BBP and the RFC This connection provides the data signal power and configuration information to the RFC A coaxial cable ADTRAN part number 3125RF027 A is provided for connecting the BBP to the RFC for the rackmount model Cable for connecting ...

Страница 18: ...or each DS1 DSX 1 interface BPV Red if the incoming T1 stream contains bipolar violations RED Red if there is no signal present at the T1 interface LPBK Yellow if the T1 interface is in loopback YEL AIS Flashes to indicate a T1 Yellow Alarm remains On solid to indicate an AIS alarm when the DS1 DSX 1 is receiving a Blue code The LEDs indicating error conditions are listed below RF Low Red indicate...

Страница 19: ... remote end will automatically be instructed to terminate the pattern generation If any bit errors are introduced the Remote Test Fail LED will illuminate The monitor points provided on the front panel of the system are listed on the next page I Demodulated received baseband output Q Demodulated received baseband output CLK Recovered clock for observing EYE pattern RSSI DC voltage indicating stren...

Страница 20: ...nd the RFC and a coax connection between the RFC and the antenna These connections require male type N coax connectors The IF connector provides the connection between the baseband processor and the rackmounted or mastmounted RFC An 8 inch IF cable ADTRAN part 3125RF027 A is provided for rackmount systems The TO ANTENNA connection provides the connection between the RFC and the antenna A block dia...

Страница 21: ...ions therefore an omnidirectional antenna is not needed The FCC provides no recourse in this band in the event of nearby interference so a highly directional antenna reduces the likelihood of interference in the antenna pattern The low power transmitter is intended to be used with a high gain antenna for long links The antenna requirements are listed below Antenna 100 mw 1 w Minimum gain 15 dBi 6 ...

Страница 22: ...r cord is required in order to meet FCC emission limits and also to prevent interference with nearby radio and television reception when using the AC voltage adapter It is essential that only the ADTRAN provided power cord be used FCC OUTPUT POWER RESTRICTIONS The FCC does not require licensing to implement this device However the FCC has established restrictions regarding maximum output power and...

Страница 23: ... precautions must be taken to prevent general population and installation personnel from exposure to RF energy in excess of specified MPE levels UNPACK INSPECT Carefully inspect the TRACER for any shipping damages If damage is suspected file a claim immediately with the carrier then contact ADTRAN Customer Service If possible keep the original shipping container for use in shipping the TRACER back...

Страница 24: ...s in the vicinity of the product or system are all to be of a grounding type and the equipment grounding conductors serving these receptacles are to be connected to earth ground at the service equipment A supplementary equipment grounding conductor shall be installed between the product or system and ground that is in addition to the equipment grounding conductor in the power supply cord The suppl...

Страница 25: ... to meet the connecting arrangement of a network interface device This cable labelled T1 Crossover is included with the BBP For connections to other CPE type equipment such as an ADTRAN TSU a straight through T1 cable ADTRAN part number 3127004 is included with the BBP Each DS1 DSX 1 interface must be configured for line code and framing either from the front panel rocker switches or via the VT 10...

Страница 26: ...ble below The IF loss applies to BBP RFC interconnection and the RF loss applies to RFC antenna interconnection Antenna manufacturers specifications may vary IF Loss 100 feet 2 4 GHz RF Loss 100 feet 5 7 GHz RF Loss 100 feet Cable in dB in dB in dB RG58 5 7 80 N A RG8 air 2 7 20 N A RG8 foam 2 9 N A 1 4 Coax 1 42 5 91 11 36 3 8 Coax 1 25 5 76 9 65 1 2 Coax 0 81 3 83 6 49 7 8 Coax 0 44 2 2 N A 1 1 ...

Страница 27: ...the fade margin in dB Climate factors are given below Climate Climate Factor Very Dry 1 8 Temperate 1 4 Humid 1 2 Terrain factors are listed below Terrain Terrain Factor Smooth 4 Average 1 Mountainous 1 4 2 4 GHz Link Distance Path Loss in miles in dB 1 104 2 110 3 114 4 116 5 118 6 120 7 121 8 122 9 123 10 124 11 125 12 126 5 8 GHz Link Distance Path Loss in miles in dB 1 112 2 118 3 121 4 124 5 ...

Страница 28: ...36 dBi 20 dBm TRACER standard output option The transmitter power is set by way of a potentiometer on the front panel of the BBP or via the configuration page of the interface VT 100 The RFC must be attached by way of the IF cable during this operation Attach an RF power meter to the N type antenna connector on the RFC and adjust the power by way of the potentiometer or VT 100 until the desired tr...

Страница 29: ...ove the cover 2 The RF unit may be identified by following the connection from the port labelled IF on the rear of the RFC This connection terminates at the RF unit The diplexer may be identified by following the connection from the Antenna port on the rear of the RFC This connection terminates at the diplexer illustrated in Figure 2 1 3 Unscrew the cable assemblies from the ports labelled Tx and ...

Страница 30: ...d by following the antenna connector to the middle connector of the diplexer Leave the cables in the same positions 3 Remove the two screws securing the diplexer and rotate the diplexer to reveal the opposite frequency plan label 4 Reinstall the two screws and reattach the cables in the same positions 5 Reinstall the lid of the mast RFC SETTING THE RFC FREQUENCY PLAN ON 5 8 GHZ MODELS The 5 8 GHz ...

Страница 31: ...sembly or by the customer for mastmount assembly This single connection provides everything the RFC requires The cable assembly attaches to the ports labeled IF on the BBP and the RFC APPLYING POWER If the ADTRAN supplied tabletop power source is used simply plug it into the circular receptacle located in the DC Power area on the rear of the BBP If a source of 21 to 60 volts DC 30 watts either pol...

Страница 32: ...RACER system is installed set the co located transmitters to the same frequency plan example Plan A Tx 2422 or Plan B Tx 2462 and set each to a different spreading code This keeps the transmitters on the additional system s from interfering with the co located receiver s 3 If the systems are from different manufacturers set the transmit frequencies as close as possible with different spreading cod...

Страница 33: ...end may also allow interference to be mitigated REMOTE BERT The TRACER includes a Bit Error Rate Tester BERT to verify that the installed system is operating correctly When the Remote Test button is pushed on the local BBP the remote end will send a BERT pattern for approximately 10 seconds The Remote TST indicator will turn yellow and remain on for the duration of the test If no bit errors are de...

Страница 34: ...onnects via modem to the TRACER unit communications via the RS 232 port will resume If a user accidentally enables modem control from a terminal and disrupts the RS 232 communication pressing CTRL Z three times will temporarily disable the modem control option This will allow the user to access the configuration menu to disable modem control When modem control is enabled the RS 232 port is inactiv...

Страница 35: ...n connect that units MANAGEMENT OUT to the next units MANAGEMENT IN port Follow that routine down the line up to 8 units TBOS operates via RS422 therefore the inputs and outputs are differential pairs The pinout for the MANAGEMENT IN port is pin 1 Transmit out of TRACER pin 3 Transmit out of TRACER pin 5 Receive in to TRACER pin 7 Receive in to TRACER The pinout for the MANAGEMENT OUT port is pin ...

Страница 36: ... Normal 1 Alarm 2 4 Alarm T1 Mux Sync Fail Link Err 0 Normal 1 Alarm 2 5 Alarm Remote RF Link Down 0 Normal 1 Alarm 2 6 Alarm RF Low 0 Normal 1 Alarm 2 7 Alarm Remote Test Fail 0 Normal 1 Alarm 2 8 Unused 3 1 Alarm T1A BPV 0 Normal 1 Alarm 3 2 Alarm T1A Red Alarm 0 Normal 1 Alarm 3 3 Alarm T1A Yellow Alarm 0 Normal 1 Alarm 3 4 Alarm T1A AIS Blue Alarm 0 Normal 1 Alarm 3 5 Alarm T1A Transmit AIS 0 ...

Страница 37: ...ing data RF Low Active if receive power is below 80 dBm Remote Test Fail Active if the 10 second BERT has failed over the RF link to the far end T1A BPV Active when the T1A incoming data stream presents bipolar violations T1A Red Alarm Active when there is no signal present at the T1A interface T1A Yellow Alarm Active when the far end T1A equipment is in red alarm T1A AIS Blue Alarm Active when th...

Страница 38: ...Minor T1A Sync Loss Minor T1A Data Loss Minor T1B Yellow Alarm Minor T1B Bipolar Violations Minor T1B Received AIS Blue Alarm Minor T1B Carrier Loss Minor T1B Sync Loss Minor T1B Data Loss Major and minor alarm contacts are provided on the rear of the baseband processor A major alarm indicates the radio link is not operational A minor alarm indicates that system performance is degraded or that the...

Страница 39: ... optional password protection of the terminal interface If enabled a password prompt is presented at power up reboot or after thirty minutes of inactivity on the terminal The default configuration is No password Password protection is enabled via the configuration menu The password is also set via the configuration menu If the password is forgotten physical access to TRACER is required to access t...

Страница 40: ... the remote system The approximate transmitter and receiver signal levels are shown via the fuel gauges If the link is down and remote end data is unavailable the fuel gauges will show instead of x The Code Sync Carrier Sync and T1 Mux Sync will all be yes for an operational link Chipping code indicates the code to which the system is set At any point in the VT 100 menu structure pressing the Esca...

Страница 41: ...CER T1 Status Menu Site Adtran T1A T1B Loop Normal State Normal Normal Received Signl Lvl 2dB to 7 5dB Less than 22 5dB RX LOS Red Alarm No Yes RX AIS Blue Alarm No No RX Yellow Alarm No No TX AIS Blue Alarm No Yes Framing ESF ESF Line Code B8ZS B8ZS Line Build Out DS1 0dB DS1 0dB Indicates last set by front panel Otherwise last set by terminal Press m Main menu Figure 3 4 Main Menu Page TRACER Ma...

Страница 42: ...resented as Errored Seconds and Severely Errored Seconds The counts for the most recent 24 hours are recorded in 15 minute increments Twenty four hour totals are recorded for the most recent days Figure 3 6 Link Performance History Page TRACER Link Performance History Site Adtran 24 Hour Registers 15 Minute Registers RFCL LINK RFCL LINK RFCL LINK 00000 00000 Current 000 000 1 1 17 2 2 18 3 3 19 4 ...

Страница 43: ...ge This screen presents alarm information for the system The T1A or T1B alarms are described in the chapter entitled Troubleshooting If any of the T1A or T1B alarms are active a minor alarm will be indicated at the alarm contacts The RF link alarm will be activated when communication between the BBP and the RFC has failed Code Sync Carrier Sync and T1 Mux Framer alarms indicate that various portio...

Страница 44: ...ver the RF Link 4 Loops the local T1 B interface towards the remote customer equipment over the RF Link 5 Loops the remote T1 A Interface towards the local customer equipment over the RF Link 6 Loops the remote T1 B Interface towards the local customer equipment over the RF Link Figure 3 10 Test Menu TRACER Test Menu Site Adtran 1 Local T1A Line Loopback 2 Local T1B Line Loopback 3 Local T1A Link ...

Страница 45: ...ations as soon as the correct code is selected Set Chipping Code allows the chipping code to be selected Each end of the link must be configured for the same chipping code Set Tx Power allows the transmitter power to be adjusted Set Freq Plan manually allows the frequency plan to be set to A or B One end of a link must be set to A and the other set to B This function is automatically set when the ...

Страница 46: ...Alarm and LEDs related to T1 B but will pass T1 data TBOS changes the TBOS Equipment ID Enable Modem Control enables modem control leads on RS 232 port See Modem Connection under Operation Section Hangup Modem lowers the DSR signal which becomes DTR after passing through the null modem adapter When modem is configured to disconnect on loss of DTR the connection will drop REMOTE ACCESS This allows ...

Страница 47: ...TRACER 2xT1 User s Manual 61280003L2 1B Section 3 Operation 36 Preliminary ...

Страница 48: ...rs corresponding to a Recommended Action or Actions I M P O R T A N T IfproblemspersistafteryouhavefollowedtheRecommendedActions contactADTRANTechnical Support at 800 726 8663 Troubleshooting using the front panel indicators Link Error light is lit or Link is Down This alarm will activate when the RF link is not operational Recommended Action Possible Cause see list below The RF link is down 1 10 ...

Страница 49: ...ts 10 Check the connections inside the mastmount or rackmount RFC 11 Replace the RFC BPV light on T1 A or B is lit This alarm will activate when the incoming T1 stream presents BPVs Recommended Action Possible Cause see list below The incoming T1 contains BPVs or errors 1 The line codes between DS1 DSX 1 equipment and the TRACER are incompatible 2 Recommended Actions 1 Check the incoming DS1 DSX 1...

Страница 50: ... T1 A or T1 B is lit The AIS YEL light will flash for AIS when the DS1 DSX 1 input receives a blue code a string of 2316 1s with no more than one zero The indicator will remain on solid if a YEL signal is present on the T1 Recommended Action Possible Cause see list below For AIS the DS1 DSX 1 equipment is sending a blue code all 1s to the T1 input 1 2 For YEL the received T1 is receiving a yellow ...

Страница 51: ...No Power Light Recommended Action Possible Cause see list below DC voltage is not applied 1 2 4 The polarity of the power connection is reversed 2 The AC transformer is not functioning properly 3 4 The AC transformer is not connected to the DC jack on the BBP or not connected to AC outlet 3 4 Recommended Actions 1 Verify that the DC voltage is between 21 60 VDC 2 Verify that negative voltage is ap...

Страница 52: ... a faulty internal component 1 Recommended Actions 1 Replace the BBP or the RFC TST light is lit after pressing Remote Test button The Remote Test light will activate during a remote test in progress The Remote Test performs a 10 second bit error rate test BERT over the RF link to the far end Recommended Action Possible Cause see list below A Remote Test has been activated from the front panel Rem...

Страница 53: ...alarm will activate if the RX power is below 80 dbm Recommended Action Possible Cause see list below The RX power is below 80 dBm 1 5 7 8 The far end transmitter is off or is transmitting low power 2 5 7 8 The RF path is not aligned 3 8 Water is in the antenna feedhorn or connectors 4 8 Recommended Actions 1 Verify the RX power is between 55 and 91 dBm 90 dBm 5 8 GHz using the VT 100 user interfac...

Страница 54: ...on the front panel Recommended Action Possible Cause see list below No DS1 DSX 1 signal or a degraded DS1 DSX 1 signal is present at the DS1 DSX 1 input 1 2 The connection at the T1 input or DS1 DSX 1 equipment is faulty 2 Recommended Actions 1 Verify the presence of a DS1 DSX 1 signal at the T1 monitor jack using a T1 test set 2 Verify that all cables and connectors are correctly wired BPV Alarm ...

Страница 55: ...n 4 Check the T1 connections at the far end equipment 5 Reset the far end equipment RF Link Alarm or Code Sync Alarm The RF Link Alarm will activate when the link is down or not operational The Code Sync Alarm will activate when data synchronization has not been achieved between the RF link Recommended Action Possible Cause see list below The RF link is down 1 10 The RX power is below the 91 dbm t...

Страница 56: ...he mastmount or rackmount RFC 11 Replace the RFC Carrier Sync Alarm or T1 Mux Framer Alarm The Carrier Sync alarm will activate when frequency synchronization has not been achieved between the RF link The T1 Mux Framer alarm will activate when synchronization between the T1 mux on each radio has not been achieved Recommended Action Possible Cause see list below The RF link is down 1 10 The RX powe...

Страница 57: ...shorts 10 Check connections inside the mastmount or rackmount RFC 11 Replace the RFC ES Values in T1 Status Menu This value indicates the number of Errored Seconds in the T1 data stream Recommended Action Possible Cause see list below In an AMI coded T1 a BPV or frame bit error has occurred 1 In an ESF coded T1 a BPV or CRC error has occurred 1 Recommended Actions 1 Check the T1 signal with a BERT...

Страница 58: ... Rx 5827 GHz Plan B 5 8 GHz Tx 5827 GHz Rx 5747 GHz Spread Spectrum Data Pump Modulation QPSK Spreading Method Direct sequence Code Length 120 bits Processing Gain 12 dB Number of Codes 10 Chipping Rate 12 times Interface Specifications Capacity 2 x T1 Connection RJ 48C bantam Line Code AMI B8ZS Framing SF ESF Alarms AIS Red Yellow BPVs Loopbacks Local and remote per T1 channel User Interface Fron...

Страница 59: ...ure 25 C to 65 C Size 19 x 1 75 x 10 5 Humidity 95 Non condensing Weight 6 lbs Rack RFC Operating Temperature 40 C to 65 C Size 19 x 1 75 x 11 5 Humidity 95 Non condensing Weight 6 lbs Mast Unit Operating Temperature 40 C to 65 C Size 21 high x 9 diameter Humidity 100 Weight 18 lbs Power Input Voltage 21 to 60 volts DC either polarity referenced to ground Power Consumption 30 watts Connector 3 pin...

Страница 60: ...an com wireless TECHNICAL SUPPORT Standard support hours are 7 a m to 7 p m CST Monday through Friday Emergency technical support is available 24 hours a day seven days a week For technical support at any time contact ADTRAN at 800 726 8663 REPAIRS AND RETURNS Return Material Authorization RMA is required prior to returning equipment to ADTRAN For RMA information contact ADTRAN at 800 726 8663 or ...

Страница 61: ...TRACER 2xT1 User s Manual 61280003L2 1B Section 6 Warranty Ordering and Return Information 50 Preliminary ...

Страница 62: ...ata Terminal Equipment ESF Extended superframe FCC Federal Communications Commission FEC Forward error correction IF Intermediate Frequency ISM Industrial Scientific and Medical LBK Loopback QPSK Quadrature Phase Shift Keying RF Radio frequency RFC Radio frequency converter RSSI Received signal strength indicator Rx Receive SF Superframe Tx Transmit TRACER 2xT1 User s Manual 51 GLOSSARY Preliminar...

Страница 63: ...TRACER 2xT1 User s Manual 61280003L2 1B Glossary 52 Preliminary ...

Страница 64: ...DSR 6 DSR 7 Ground 7 Ground Personal Computer Connection DB9 TRACER DCE Computer DTE Number Name Number Name 2 TXD 3 TXD 3 RXD 2 RXD 4 RTS 7 RTS 5 CTS 8 CTS 6 DSR 6 DSR 7 Ground 5 Ground Modem Connection DB25 TRACER DCE Modem DCE Number Name Number Name 2 TXD 3 RXD 3 RXD 2 TXD 4 RTS 5 CTS 5 CTS 4 RTS 6 DSR 20 DTR 7 Ground 7 Ground TRACER 2xT1 User s Manual I APPENDIX A CABLE CONNECTIONS Preliminar...

Страница 65: ...ACER The pinout for the MANAGEMENT OUT port is pin 1 Receive in to TRACER pin 3 Receive in to TRACER pin 5 Transmit out of TRACER pin 7 Transmit out of TRACER The rear panel connectors are on a double stack RJ45 so the pin numbers are opposite of each other A TBOS monitoring system will need to define the following bitmaps to indicate status and alarm conditions Figure 3 1 Rear Panel Connectors __...

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