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8018653 1.1

Troubleshooting • 4-1

Chapter 4

Troubleshooting

Troubleshooting procedures and tests in this section will help isolate a
problem to a specific source for correction. Once you have determined
the cause of the malfunction, refer to chapter 5, “Maintenance” for the
appropriate repair or replacement procedure.

4.1

Fault analysis procedure

The following procedures outline steps you should follow when
troubleshooting a BSC system malfunction.

1.

If possible, speak with the person who filed the trouble
complaint and determine the operational symptoms.

2.

Record the symptoms on a malfunction report such as the one
shown in figure 4-1.

3.

Refer to section 4.2, “Troubleshooting flowcharts”

Summary of Contents for GMH2000

Page 1: ...rcraft Company HUGHES NETWORK SYSTEMS Base Station Controller Installation and Maintenance Manual HNS 8018653 April 11 1994 Version 1 1 Hughes Network Systems Inc 11717 Exploration Lane Germantown Maryland 20876 301 428 5500 ...

Page 2: ...Copyright 1992 1993 1994 Hughes Network Systems Inc ...

Page 3: ... 2 21 Installing vertical cable ladders 2 21 2 6 Installing BSC input power and ground cables 2 21 2 7 Installing the external LAN cable 2 27 Floor access installation procedure 2 28 Ceiling access installation procedure 2 29 2 8 Installing E1 T1 trunk cables 2 29 2 9 Activating the BSC rack 2 37 2 10 Installing BSC modules 2 37 Installing T1 interface modules 2 39 Installing E1 interface modules ...

Page 4: ...nance 5 1 5 1 Periodic maintenance 5 1 5 2 Electrostatic discharge control 5 2 5 3 Required tools for maintenance 5 2 5 4 Replacement procedures 5 2 Replacing BSC circuit modules 5 4 5 5 Standard HNS return and repair procedure 5 6 Factory return procedure 5 6 Domestic Returns 5 7 International Returns 5 7 A Acronyms and abbreviations A 1 ...

Page 5: ...es of the BSC racks together 2 19 2 14 Connecting the top frames of the BSC racks together 2 20 2 15 Power cable and ground cable connections 2 22 2 16 PDU front panel switches 2 23 2 17 PDU terminal block slot locations 2 24 2 18 Terminal block cable clamp screw location 2 25 2 19 Grounding the BSC rack 2 26 2 20 BSC BCP LAN repeater connection 2 27 2 21 Connector J83 location 2 28 2 22 E1 T1 mod...

Page 6: ...vi Figures 8018653 1 1 ...

Page 7: ... 3 E1 or T1 module failed SUDs 4 5 4 4 CPM or STM failed SUDs 4 5 4 5 You are unable to download the online software 4 6 4 6 You are unable to bring the CCP online 4 7 4 7 You are unable to establish T1 lines 4 8 4 8 You are unable to establish E1 lines 4 9 4 9 The STMs fail to come online and stay online 4 10 ...

Page 8: ...viii Flowcharts 8018653 1 1 ...

Page 9: ... power cable connections 2 26 2 6 Trunk cable J79 E1 RVS listing by cable connector pin number 2 31 2 7 BSC chassis assembly slot designations 2 39 2 8 BSC chassis assembly identification codes 2 48 3 1 Normal operating configuration for BSC rack switches and indicators 3 1 3 2 BSC module LED status display codes 3 3 3 3 BSC rack power control 3 4 5 1 BSC circuit module status LED readouts 5 5 ...

Page 10: ...x Tables 8018653 1 1 ...

Page 11: ...em Chapter 2 contains the BSC installation procedures Chapter 3 describes activating and deactivating the BSC Chapter 4 covers troubleshooting Chapter 5 covers periodic maintenance describes measures for protecting personnel and equipment from electrostatic discharge and contains the procedures for replacing failed equipment Appendix A lists the abbreviations and acronyms used in this manual Assum...

Page 12: ...used in this document Notes cautions and warnings defined as follows are used throughout this manual to help you become familiar with possible safety or equipment hazards Note Presents additional information or interesting sidelights Caution Indicates a procedure that may result in equipment damage if not strictly observed WARNING Indicates a procedure that may result in personal injury if not str...

Page 13: ...n Number GMH 2000 BSC Site Planning Guide 8018531 GMH 2000 BSC Site Survey Worksheets 8018628 GMH 2000 BSC Site Configuration Worksheets 8018627 GMH 2000 Base Station Subsystem BSS Description 8018529 GMH 2000 Base Station Subsystem BSS Operations and Maintenance Manual 8018530 GMH 2000 Local Maintenance Terminal LMT Operator s Reference Manual 8019007 GHM 2000 BSC Site Preparation Specifications ...

Page 14: ...xiv About this manual 8018653 1 1 ...

Page 15: ... OMC MSC E1 TRUNK CIRCUIT E1 TRUNK CIRCUIT T1 TRUNK CIRCUIT ETHERNET LINK PSTN BTS Subsidiar y of Hughes Aircraft Company HUG HES NETWO RK SYSTEM S BSC BSC BTS MOBILE STATIONS Subsidiar y of Hughes Aircraft Company HUG HES NETWO RK SYSTEM S BTS T1 TRUNK CIRCUIT T1 TRUNK CIRCUIT SUBSCRIBER SETS MSU Figure 1 1 The GMH 2000 digital wireless communications system architecture The terms GHM 2000 M6100 ...

Page 16: ... IS 54 IS 54 Digital is the digital standard for telecommunications it provides up to three time division multiple access TDMA voice circuits per RF channel Extended TDMA E TDMA Developed by HNS E TDMA provides 10 to 15 voice circuits per RF channel As shown in figure 1 1 the GMH 2000 cellular system architecture contains the following subsystems Mobile switching center MSC Operations and maintena...

Page 17: ...all switching functions It controls subscriber functions of registration authentication and records management using the home location register HLR and visitor location register VLR The HLR is a permanent database of all subscribers that is integrated into a national network of subscriber databases to improve call delivery and prevent fraud The VLR is a semi permanent fast access database that con...

Page 18: ...t help the operator support opera tion administration and maintenance activities Among the features provided are the ability to remotely configure BTS cell frequencies download software to BSCs re route trunk circuits manage subscriber records diagnose and respond to system faults and collect and analyze performance statistics Figure 1 3 Operations and Maintenance Center ...

Page 19: ...o compression and decompression Su bs idi ar y of Hu gh es Ai rcr aft Co m pa ny HUGHES N ET W OR K SY ST EM S Figure 1 4 BSC equipment rack 1 4 Base transceiver station The BTS includes antennas transmitters and receivers that communicate with the mobile stations and digital multiplex equipment that deliver audio traffic via T1 links to the BSC for further processing The BTS includes the followin...

Page 20: ...es Airc raft Com pan y HUGHES NE TW OR K SY ST EM S Sub sidi ary of Hug hes Airc raft Com pan y HUGHES NE TW OR K SY ST EM S Sub sidi ary of Hug hes Airc raft Com pan y HUGHES NE TW OR K SY ST EM S Sub sidi ary of Hug hes Airc raft Com pan y HUGHES NE TW OR K SY ST EM S CUMC STACK RFMC STACK Figure 1 5 BTS stacks typical RFMC RFMC equipment shown in figure 1 5 perform the following functions Ampli...

Page 21: ... 0 RCL CLR STO P1 FCN P2 DEF M NO W XY ABC JKL TUV GHI PRS OPR Dig ital In Use 1 QZ P1 FCN P2 RCL CLR STO SND PW R END Figure 1 6 M6100 telephone and transceiver unit 1 5 Mobile station The MS typically consists of an M6100 digital analog cellular telephone and a transceiver unit see figure 1 6 M6100 digital analog cellular telephone M6100 cellular telephone features include the following Support ...

Page 22: ... voice signal then amplifies the signal for transmis sion to the nearest BTS The transceiver transmits in the frequency range 824 04 to 848 97 MHz at an RF power output of 3 watts During receive operations the transceiver amplifies demodulates decompresses and converts from digital to analog the received signal from the BTS The transceiver unit receives in the range of 869 04 to 893 97 MHz with a ...

Page 23: ...BSC rack installation kit contains a documentation pack age that includes an itemized bill of materials BOM which details exactly what that particular kit should contain Use the BOM as a checklist to inventory the shipment contents and verify that all items are present All shortages should be reported to HNS for resolution The following rack installation kits are available refer to the customer do...

Page 24: ...rack 1014338 0001 Qty 1 CHASS IS 1 CIRC UIT B CHASS IS 2 CHASS IS 3 CHASS IS 1 CIRC UIT A CHASS IS 2 CHASS IS 3 Su bsi dia ry of Hu ghe sA ircr aft Co mp any HUGHES NE TW OR K SY ST EM S End panels 907016 0019 Qty 2 Rack door lefthand 1016158 0001 Qty 2 Rack door righthand 1016157 0001 Qty 2 ...

Page 25: ...nts BSC rack 1014338 0001 Qty 1 CHASS IS 1 CIRC UIT B CHASS IS 2 CHASS IS 3 CHASS IS 1 CIRC UIT A CHASS IS 2 CHASS IS 3 Su bsi dia ry of Hu ghe sA ircr aft Co mp any HUGHES NE TW OR K SY ST EM S Rack door lefthand 1016158 0001 Qty 2 Rack door righthand 1016157 0001 Qty 2 Contact strip 9007016 0015 Qty 1 ...

Page 26: ... OK AL M DE BU G S T A T U S RE SE T CPM 1013092 0002 Qty Variable CP M CP M OK AL M DE BU G S T A T U S RE SE T T1 interface module 1013098 0001 Qty Variable OK AL M DE BU G S T A T U S 1 0 RE SE T SW T1 T1 E1 interface module 1013101 0001 Qty Variable OK AL M DE BU G S T A T U S 1 0 RE SE T SW E1 E1 ...

Page 27: ...e E1 T1 blank panel 1014251 0002 Qty Variable 2 2 Tools and materials required for installation The following are required Phillips crosstip screwdriver 1 Flat tip screwdrivers 1 8 inch and 1 4 inch or metric equivalents blade widths Ratchet wrench 3 8 inch drive or metric equivalent with standard sockets Diagonal cutters large Adjustable wrench Chalk line 12 foot or metric equivalent measuring ta...

Page 28: ...ap and restraint bands Configuration 2 The rack is mounted on a pallet and is protected by a moisture barrier and restraint bands If your shipment arrived in a configuration 1 container refer to section Unpacking a configuration 1 shipment Otherwise refer to section Unpacking a configuration 2 shipment CHA SSIS 1 CIR CUI T B CHA SSIS 2 CHA SSIS 3 CHA SSIS 1 CIR CUI T A CHA SSIS 2 CHA SSIS 3 Su bs ...

Page 29: ...and remove the restraint bands from the pallet see figure 2 2 2 Using a cross tip screwdriver remove the screws attaching the sleeve to the pallet see figure 2 2 for locations 3 Lift and remove the cap from the sleeve see figure 2 2 4 Remove the sleeve from the pallet RESTRAINT BANDS SLEEVE SCREWS SLEEVE SCREWS SLEEVE CAP PALLET Figure 2 2 Restraint band cap and sleeve removal ...

Page 30: ...IS 2 CHA SSIS 3 CHA SSIS 1 CIR CUI T A CHA SSIS 2 CHA SSIS 3 Su bs idiary of Hug he sA irc ra ft Com pa ny HUGHES N ETW ORK SY ST EM S MOISTURE BARRIER BSC RACK Figure 2 3 Moisture barrier removal 5 Remove the moisture barrier from the pallet see figure 2 3 for locations ...

Page 31: ...TEM S FOAM SLEEVE BRACE Figure 2 4 Foam brace removal 6 Remove the foam brace from the BSC rack see figure 2 4 7 Using a socket wrench with a 1 4 inch socket or metric equivalent remove the lag bolts attaching the three front sleeve braces to the pallet see figure 2 5 Note The front sleeve braces are located on the side of the BSC rack that has the Hughes Network Systems and GMH 2000 logos on it ...

Page 32: ...e lag bolts attaching the four brackets to the pallet see figure 2 6 9 Using a socket wrench with a 3 8 inch socket or metric equivalent remove the bolts and lock nuts attaching the four brackets to the BSC rack see figure 2 6 Note You may need to use a 3 8 inch or metric equivalent open end or combination wrench to hold the lock nuts in place while you remove the bolts ...

Page 33: ...ot attempt to remove it from the pallet by yourself Safety requires at least five installers four to remove the rack from the pallet while one installer operates the pallet truck Failure to follow this warning could result in personal injury 10 As each installer supports a side of the rack lift a corner of the rack and shift the rack by pivoting on the opposite corner ...

Page 34: ...ry of Hug he sAi rc ra ft Com pa ny HUGHES N ETW ORK SY ST EM S Figure 2 7 Moving the BSC rack from pallet to pallet truck 12 While two installer stabilize the side of the rack on the pallet truck the other two installers should rotate the pallet side of the rack onto the pallet truck 13 Use the floorplan supplied in the Site Planning Guide customer s documentation package to determine where the e...

Page 35: ...ee figure 2 8 that are used to plumb the rack Verify that the rack is correctly positioned then using a 1 2 inch 11 mm socket extend each foot until a level placed across the top of the rack in two different axes shows that the rack is plumb see figure 2 9 LEVELING BOLTS Figure 2 8 BSC rack leveling feet locations ...

Page 36: ...AND Y Figure 2 9 Verifying that the BSC rack is plumb 16 If there are no expansion BSC racks to install continue on to section 2 5 Installing BSC input power and ground cables Otherwise repeat steps 1 through 15 to install the expansion racks then go to section Anchoring multiple BSC racks ...

Page 37: ...018653 1 1 Installing BSC hardware 2 15 Note Leave approximately 1 4 inch 5 mm of space between each rack when you install it see figure 2 10 1 4 INCH 5 m m Figure 2 10 Spacing between multiple BSC racks ...

Page 38: ...nt racks 1 Using a pair of diagonal cutters cut and remove the restraint bands from the pallet see figure 2 11 CHA SSIS 1 CIR CUI T B CHA SSIS 2 CHA SSIS 3 CHA SSIS 1 CIR CUI T A CHA SSIS 2 CHA SSIS 3 Su bs idiary of Hug he sAi rc ra ft Com pa ny HUGHES N ETW ORK SY ST EM S RESTRAINT BANDS PALLET Figure 2 11 Restraint band removal ...

Page 39: ...iary of Hug he sA irc ra ft Com pa ny HUGHES N ETW ORK SY ST EM S MOISTURE BARRIER BSC RACK Figure 2 12 Moisture barrier removal 2 Remove the moisture barrier from the pallet see figure 2 12 for locations 3 Using a socket wrench with a 1 4 inch socket remove the lag bolts attaching the three front sleeve braces to the pallet see figure 2 5 ...

Page 40: ...to hold the lock nuts in place while you remove the bolts WARNING The BSC rack weighs more than 750 pounds 340 kg Do not attempt to remove it from the pallet by yourself Safety requires at least five installers four to remove the rack from the pallet while one installer operates the pallet truck Failure to follow this warning could result in personal injury 6 As each installer supports a side of t...

Page 41: ... in its proper place using the pallet truck 13 If the rack is being installed on a level raised floor go to step 14 Otherwise there are leveling feet in the base of the rack one near each corner see figure 2 8 that are used to plumb the rack Verify that the rack is correctly positioned then using a 1 2 inch 11 mm socket extend each foot until a level placed across the top of the rack in two differ...

Page 42: ...ead mounting screws through the bottom side frames of the first pair of BSC racks as shown in figure 2 13 MOUNTING HARDWARE 9007016 0013 9004651 0255 CONTACT ANGLE 9007016 0016 MOUNTING HARDWARE 9007034 0005 SPACER 9007016 0017 2 PLACES Figure 2 13 Connecting the bottom frames of the BSC racks together ...

Page 43: ...the spacers fit over the screw shafts see figure 2 13 4 Insert a contact angle between the rack frames see figure 2 13 MOUNTING HARDWARE 9007016 0013 9004651 0258 MOUNTING HARDWARE 9007034 0005 SPACER 9007016 0017 2 PLACES Figure 2 14 Connecting the top frames of the BSC racks together 5 Install two 10 X 100 hex head mounting screws through the top side frames of the first pair of BSC racks as sho...

Page 44: ... to anchor the remaining BSC racks then continue on to section 2 5 Installing cable ladders 2 5 Installing cable ladders This section contains procedures for installing horizontal and vertical cable ladders Refer to the appropriate procedure Installing horizontal cable ladders This section is currently TBD Installing vertical cable ladders This section is currently TBD 2 6 Installing BSC input pow...

Page 45: ...B3 1 CHASSIS 3 SWITCH CIRCUIT BREAKER TB3 2 RTN CABLE TB3 2 TB4 2 RTN CABLE TB4 1 CHASSIS 1 SWITCH CIRCUIT BREAKER TB4 2 TB5 1 48 VDC CABLE TB5 1 CHASSIS 2 SWITCH CIRCUIT BREAKER TB5 2 RTN CABLE TB5 2 TB6 2 RTN CABLE TB6 1 CHASSIS 3 SWITCH CIRCUIT BREAKER TB6 2 SAFETY GROUND CABLE SAFETY GROUND CABLE SAFETY GROUND CABLE SAFETY GROUND CABLE SAFETY GROUND CABLE TB2 1 48 VDC CABLE TB4 1 48 VDC CABLE ...

Page 46: ...CH CIRCUIT B CHASSIS 3 SWITCH Figure 2 16 PDU front panel switches 3 Locate the cable labeled TB1 1 48V and insert it into the PDU terminal block slot labeled TB1 1 see figure 2 17 for locations While holding the cable in place use a flat tip screwdriver to tighten the cable clamp located in the top of the terminal block see figure 2 18 Once the clamp screw is tightened wiggle the cable slightly t...

Page 47: ...e 2 25 4 Locate the cable labeled TB1 2 RTN and install it into the PDU terminal block slot labeled TB1 2 HAZARD RNING TB6 2 TB6 1 TB5 2 TB5 1 TB4 2 TB4 1 TB3 2 TB3 1 TB2 2 TB2 1 TB1 2 TB1 1 Figure 2 17 PDU terminal block slot locations ...

Page 48: ...2 26 Installing BSC hardware 8018653 1 1 Figure 2 18 Terminal block cable clamp screw location 5 Attach a terminal lug to the safety ground cable labeled E1 GND see figure 2 19 for locations ...

Page 49: ...GROUNDING STUD E3 GROUNDING STUD E4 GROUNDING STUD HARDWARE SAFETY GROUND CABLE TERMINAL LUG 9006945 0002 FROM INSTALLATION KIT Figure 2 19 Grounding the BSC rack 7 Repeat steps 3 and 4 to install the cables listed in table 2 5 Table 2 5 Input power cable connections PDU Circuit A PDU Circuit B Cable Destination Cable Destination TB1 1 48V TB1 1 TB4 1 48V TB4 1 TB1 2 RTN TB1 2 TB4 2 RTN TB4 2 E1 G...

Page 50: ... the external LAN cable that connects the BSC to the BSC LAN repeater see figure 2 20 If the BCP LAN cable is suspended from the ceiling above the BSC rack refer to section Ceiling access Otherwise continue on to the following section MICROVAX VT420 TERMINAL LN05 PRINTER PAN 2624 PRINTER LAN REPEATER 1 LAN REPEATER 2 BSC RACK EXPANSION 1 15 VAXSTATION VAXSTATION BCC BCP BTS BTS BSC RACK 3 BTS BTS ...

Page 51: ...8018653 1 1 Installing BSC hardware 2 29 HAZARD W ER IS COVER NG CONNECTOR J83 Figure 2 21 Connector J83 location ...

Page 52: ...l BSC racks repeat steps 1 through 3 to install the LAN cables Then go to section 2 7 Installing E1 T1 trunk cables Ceiling access installation procedure 1 Remove the terminator from connector J83 shown in figure 2 21 on the backplane of the top BSC chassis chassis 1 on the initial BSC rack 2 Install the BNC type connector of the BSC external LAN cable to J83 3 Install a terminator onto connector ...

Page 53: ...he Site Preparation document for specific trunk cable routing information T1 MODULE SLOT 1 J65 T1 MODULE SLOT 2 J66 T1 MODULE SLOT 3 J67 T1 MODULE SLOT 4 J68 FUTURE T1 MODULE EXPANSION SLOT 5 J69 E1 MODULE SLOT 9 J73 E1 MODULE SLOT 10 J74 E1 MODULE SLOT 11 J75 E1 MODULE SLOT 12 J76 E1 MODULE SLOT 13 J77 FUTURE T1 MODULE EXPANSION SLOT 6 J70 FUTURE T1 MODULE EXPANSION SLOT 7 J71 FUTURE T1 OR E1 MOD...

Page 54: ... BSC hardware 8018653 1 1 HIGH ENERGY SHOCK DISCONNECT POW BEFORE REM OVING THI WARNIN T1 RVS CONNECTOR J87 E1 T1 FWD CONNECTOR J80 E1 T1 RVS CONNECTOR J79 T1 FWD CONNECTOR J86 Figure 2 23 E1 T1 trunk cable connectors ...

Page 55: ...VS TIP 22 J79 08 Brown White E1 05 11 1 RVS RING 21 J79 09 White Gray Slate RVS TIP 21 J79 10 Gray Slate White E1 04 11 0 RVS RING 20 J79 11 Red Blue RVS TIP 20 J79 12 Blue Red E1 07 10 1 RVS RING 19 J79 13 Red Orange RVS TIP 19 J79 14 Orange Red Shield Drain wire GND J79 15 Bare Wire E1 06 10 0 RVS RING 18 J79 16 Red Green RVS TIP 18 J79 17 Green Red E1 09 9 1 RVS RING 17 J79 18 Red Brown RVS TIP...

Page 56: ... FWD TIP 22 J80 08 Brown White E1 05 11 1 FWD RING 21 J80 09 White Gray Slate FWD TIP 21 J80 10 Gray Slate White E1 04 11 0 FWD RING 20 J80 11 Red Blue FWD TIP 20 J80 12 Blue Red E1 07 10 1 FWD RING 19 J80 13 Red Orange FWD TIP 19 J80 14 Orange Red Shield Drain wire GND J80 15 Bare Wire E1 06 10 0 FWD RING 18 J80 16 Red Green FWD TIP 18 J80 17 Green Red E1 09 9 1 FWD RING 17 J80 18 Red Brown FWD T...

Page 57: ...te White T1 05 3 1 FWD RING 05 J86 11 Red Blue FWD TIP 05 J86 12 Blue Red T1 06 4 0 FWD RING 06 J86 13 Red Orange FWD TIP 06 J86 14 Orange Red Shield Drain wire J86 15 Bare Wire T1 07 4 1 FWD RING 07 J86 16 Red Green FWD TIP 07 J86 17 Green Red Future Expansion 5 0 FWD RING 08 J86 18 Red Brown T1 08 FWD TIP 08 J86 19 Brown Red Future Expansion 5 1 FWD RING 09 J86 20 Red Gray Slate T1 09 FWD TIP 09...

Page 58: ... White T1 05 3 1 RVS RING 05 J87 11 Red Blue RVS TIP 05 J87 12 Blue Red T1 06 4 0 RVS RING 06 J87 13 Red Orange RVS TIP 06 J87 14 Orange Red Shield Drain wire GND J87 15 Bare Wire T1 07 4 1 RVS RING 07 J87 16 Red Green RVS TIP 07 J87 17 Green Red Future Expansion 5 0 RVS RING 08 J87 18 Red Brown T1 08 RVS TIP 08 J87 19 Brown Red Future Expansion 5 1 RVS RING 09 J87 20 Red Gray Slate T1 09 RVS TIP ...

Page 59: ...ne Signal Name Backplane Conn Pin Wire Color Code Solid Stripe Future Expansion 8 0 FWD RING 14 J80 24 Black Orange T1 14 FWD TIP 14 J80 25 Orange Black Future Expansion 8 1 FWD RING 15 J80 22 Black Blue T1 15 FWD TIP 15 J80 23 Blue Black Caution Bear in mind while routing BSC E1 T1 interface cables that there is not much clearance between the back of the BSC chassis and the rear rack doors The ca...

Page 60: ...2 38 Installing BSC hardware 8018653 1 1 BACKPLANE SHIELD CABLE POST HIGH ENERGY SHOCK HAZARD DISCONNECT POW ER BEFORE REM OVING THIS COVER WARNING FIgure 2 24 Cable routing ...

Page 61: ...ivate the PDU switches for circuits that are actually functioning CIRCUIT A CHASSIS 1 switch CIRCUIT A CHASSIS 2 switch CIRCUIT A CHASSIS 3 switch CIRCUIT B CHASSIS 1 switch CIRCUIT B CHASSIS 2 switch CIRCUIT B CHASSIS 3 switch Verify that all fans are operating 3 Close the rack front doors BSC rack power up is complete 2 10 Installing BSC modules This section describes installing the following BS...

Page 62: ...c ra ft Com pa ny HUGHES N ETW ORK SYSTEM S Figure 2 25 BSC chassis assemblies Each BSC chassis assembly has 47 slots that are populated as shown in table 2 7 see figure 2 26 for locations Note The quantity and type of modules installed in each chassis assembly is determined by the customer specific configuration data included in the Site Planning Guide customer s documenta tion package ...

Page 63: ...1 SLOT 6 TOP T1 SLOT 7 TOP T1 SLOT 8 TOP T1 or E1 SLOT 9 TOP E1 SLOT 10 TOP E1 SLOT 11 TOP E1 SLOT 12 TOP E1 SLOT 13 TOP E1 SLOT 14 STM SLOT 15 STM SLOT 16 STM SLOT 17 STM SLOT 18 STM SLOT 19 STM SLOT 20 STM SLOT 21 STM SLOT 22 STM SLOT 23 STM SLOT 24 STM SLOT 25 STM SLOT 26 STM SLOT 27 STM SLOT 28 STM SLOT 29 STM SLOT 30 STM SLOT 31 STM SLOT 32 STM SLOT 33 STM SLOT 34 STM SLOT 1 BOTTOM RESERVED S...

Page 64: ...ligator clip to an unpainted metal surface on the rack or one of the BSC chassis frames 1 Remove a T1 interface module see table 2 1 from its shipping container Save the container in case you return a module for service 2 Insert the module into slot 1 top of the card cage refer to figure 2 26 for locations Extend the upper and lower ejector injectors as shown in figure 2 27 OK ALM OK ALM EJECTOR I...

Page 65: ...e both ejector injectors to seat the module into the backplane 5 Use a crosstip screwdriver to tighten the T1 module s top and bottom captive screws 6 Release the front panel reset switch toggle so that it returns to the center position Verify that the status light emitting diode LED readout displays a u after completing startup diagnostics SUDs Note If the status readout does not display a u the ...

Page 66: ...he module has failed SUDs Refer to section 4 Troubleshooting Repeat steps 1 through 5 to install additional E1 modules in descending order into the BSC chassis then refer to section Installing control processor modules Installing control processor modules Depending on the slot that it has been installed in the control processor module CPM operates in one of three modes global resource processor GR...

Page 67: ... remaining GRP slot slot 4 then refer to section Installing CCP modules Installing CPMs in CCP slots 1 Remove a CPM see table 2 1 from its shipping container Save the container 2 Press the front panel reset switch toggle into the down position 3 Install the module into slot 5 bottom of the card cage 4 Use a crosstip screwdriver to tighten the module s captive screws 5 Connect a VT100 type terminal...

Page 68: ...CPMs in CAP slots 1 Remove a CPM see table 2 1 from its shipping container Save the container 2 Press the front panel reset switch toggle into the down position 3 Install the module into slot 9 bottom of the card cage 4 Use a crosstip screwdriver to tighten the module s captive screws 5 Set module front panel DIP switches to the SUDs setting shown in figure 2 29 6 Release the front panel reset swi...

Page 69: ...ys a P after completing SUDs then displays a d Note If the status readout does not display a P the module has failed SUDs Refer to section 4 Troubleshooting Repeat steps 1 through 6 to install additional STMs into the BSC chassis then refer to section Installing blank panels Installing blank panels All empty slots on the BSC chassis assembly must be covered by blank panels Perform the following pr...

Page 70: ...2 48 Installing BSC hardware 8018653 1 1 CHASSIS 1 CIR C CHAS Subsidiary of HughesAircraft Com pany HUGHES N ETW ORK SYSTEM S BLANK PANEL CAPTIVE SCREWS Figure 2 30 Blank panel ...

Page 71: ...chassis assemblies inside each BSC rack are numbered from the top to bottom F R O N T O F R A C K S BSC CHASSIS 1 BSC CHASSIS 2 BSC CHASSIS 3 BSC RACK 1 INITIAL RACK BSC CHASSIS 4 BSC CHASSIS 5 BSC CHASSIS 6 BSC RACK 2 EXPANSION RACK BSC CHASSIS 7 BSC CHASSIS 8 BSC CHASSIS 9 BSC RACK 3 EXPANSION RACK BSC CHASSIS 10 BSC CHASSIS 11 BSC CHASSIS 12 BSC RACK 4 EXPANSION RACK BSC CHASSIS 13 BSC CHASSIS ...

Page 72: ...acks 1 After removing the protective tape set DIP switch S1 located on the backplane of BSC chassis 1 see figure 2 32 for switch location to the configuration shown in table 2 8 2 After removing the protective tape set DIP switch S1 located on the backplane of BSC chassis 2 to the configuration shown in table 2 8 3 After removing the protective tape set DIP switch S1 located on the backplane of BS...

Page 73: ...e 2 51 HIGH ENERGY SHOCK HAZARD DISCONNECT POW ER BEFORE REMOVING THIS COVER WARNING OPEN 8 7 6 5 4 3 2 1 BSC CHASSIS ASSEMBLY BACKPLANE BLACK RECTANGLE INDICATES SIDE OF SWITCH THAT IS PRESSED INWARDS Figure 2 32 BSC chassis ID setting ...

Page 74: ...1 4 OPEN 8 7 6 5 4 3 2 1 19 OPEN 8 7 6 5 4 3 2 1 2 expansion rack 5 OPEN 8 7 6 5 4 3 2 1 7 expansion rack 20 OPEN 8 7 6 5 4 3 2 1 6 OPEN 8 7 6 5 4 3 2 1 21 OPEN 8 7 6 5 4 3 2 1 7 OPEN 8 7 6 5 4 3 2 1 22 OPEN 8 7 6 5 4 3 2 1 3 expansion rack 8 OPEN 8 7 6 5 4 3 2 1 8 expansion rack 23 OPEN 8 7 6 5 4 3 2 1 9 OPEN 8 7 6 5 4 3 2 1 24 OPEN 8 7 6 5 4 3 2 1 10 OPEN 8 7 6 5 4 3 2 1 25 OPEN 8 7 6 5 4 3 2 1 ...

Page 75: ... with a redundant 48 Vdc supply line circuit B to the PDU and three operating BSC chassis Your BSC rack may not have the circuit B supply line installed or may not be using all three BSC chassis In that case only activate the PDU switches for circuits that are actually functioning Table 3 1 Normal operating configuration for BSC rack switches and indicators Device Switch Lamp Setting Indication PD...

Page 76: ...mode and is extinguished when module is in primary mode When flashing the dot LED indicates that synchronization has been lost between the BSC and BTS components The alphanumeric LED displays information regarding the switch state of the module and its operational state When the switch state is set to switched in mode that is the module is the primary and can receive and transmit data the operatio...

Page 77: ... camp on mode While in camp on mode the module continues to service existing user calls but will not accept any new calls Once all calls have been completed the module will automatically enter maintenance mode and alert the operators F Switched In Failed The module has detected a malfunction either in the module itself or in an associated component U Switched In Undefined This mode is assigned by ...

Page 78: ...k is now deactivated If you need to restart it again refer to section 3 4 Restarting the BSC rack to do so 3 3 BSC chassis assembly shutdown Perform the following procedure to deactivate a BSC chassis assembly 1 Open the front doors on the BSC rack 2 Refer to table 3 3 to determine which PDU power switches to set to OFF Table 3 3 BSC rack power control BSC chassis assemblies PDU power switches Top...

Page 79: ...erform the following procedure to apply power to the BSC rack equip ment 1 Open the front doors on the BSC rack Note Your BSC rack may not have the circuit B 48 Vdc supply line installed or may not be using all three BSC chassis In that case only activate the PDU switches for circuits that are actually functioning 2 Set the following PDU power switches to ON CIRCUIT A CHASSIS 1 switch CIRCUIT A CH...

Page 80: ...3 6 Operation and shutdown 8018653 1 1 ...

Page 81: ...apter 5 Maintenance for the appropriate repair or replacement procedure 4 1 Fault analysis procedure The following procedures outline steps you should follow when troubleshooting a BSC system malfunction 1 If possible speak with the person who filed the trouble complaint and determine the operational symptoms 2 Record the symptoms on a malfunction report such as the one shown in figure 4 1 3 Refer...

Page 82: ... panel DIP switch setting 1____ 2____ 3____ 4____ Open Closed 7 What was the BSC chassis ID switch setting __________ HEX 8 Failure symptoms Figure 4 1 Typical malfunction data sheet 4 2 Troubleshooting flowcharts Review the following symptoms to determine which one most closely resembles the current BSC rack failure Then refer to the flowchart listed to troubleshoot the problem Symptom Refer to f...

Page 83: ...r been restored to BSC rack Yes No Problem is not caused by the BSC rack Refer to site specific documentation to troubleshoot electrical supply system BSC rack is operational Has power been restored to BSC rack Yes No BSC rack is operational Verify that all source voltage supply line circuit breakers are set to ON Is 48 VDC present Yes No The power distribution unit PDU must be replaced Verify tha...

Page 84: ...tray assembly must be replaced Verify that 48 VDC is being supplied from the PDU to the BSC chassis backplane Is 48 VDC present No Yes The power distribution unit PDU must be replaced Are cooling fans operating in the malfunctioning chassis Yes No Verify that 48 VDC is being provided at the appropriate PDU terminal block Has power been restored to chassis Yes No BSC chassis is operational Install ...

Page 85: ...tenance section Replacing BSC circuit modules to replace the defective module Flowchart 4 3 E1 or T1 module failed SUDs Start Write the Error Code on the malfunction report then refer to chapter 5 Maintenance section Replacing BSC circuit modules to replace the defective module Flowchart 4 4 CPM or STM failed SUDs ...

Page 86: ...the BSC chassis wait 30 seconds then install it back into its slot Perform the steps listed in section 4 3 Startup diagnostics procedure Problem solved Yes No The ramdisk was corrupted System is now operational Refer to chapter 5 Maintenance section Replacing BSC circuit modules to replace the GRP Problem solved Yes No Refer to chapter 5 Maintenance section Replacing BSC chassis assembly to replac...

Page 87: ... in section 4 3 Startup diagnostics procedure Problem solved Yes No The ramdisk was corrupted System is now operational Refer to chapter 5 Maintenance section Replacing BSC circuit modules to replace the CCP Problem solved Yes No Refer to chapter 5 Maintenance section Replacing BSC chassis assembly to replace the BSC chassis Install the original CCP Then remove all other CCPs CAPs and STMs from BS...

Page 88: ...sociated CAP and re insert into the slot Problem solved Yes No System is operational SUDs completed properly Yes No Problem solved Yes No System is operational Swap out the associated T1 card with a functional T1 card Perform the steps listed in section 4 3 Startup diagnostics procedure on associated CAP and T1 card Problem solved Yes No Swap out the associated CAP with a functional CAP or CCP Sys...

Page 89: ...l Problem solved Yes No System is operational Remove unused E1 cards from BSC Problem solved Yes No System is operational Unplug associated CCP and re insert into the slot Problem solved No Yes Unplug associated CAP and re insert into the slot SUDs completed properly No Yes Perform the steps listed in section 4 3 Startup diagnostics procedure on associated CCP CAP and T1 cards Write the Error Code...

Page 90: ...h a known good CAP Unplug associated CAP and re insert into the slot Problem solved Yes No Verify that the VME terminator cards found on the back of the BSC backplane are installed correctly On a correctly installed VME card the part number on should be in the upper right hand corner of the terminator card System is operational Problem solved Yes No System is operational Unplug associated STM and ...

Page 91: ...select Maintenance 5 Type 5 then press Return to Change Port0 Operating Mode 6 Type 2 then press Return to select Local Loopback 7 Type 2 then press Return to Change Port0 Sparing Status 8 Type 1 then press Return to select Switched In 9 Make a note of front panel DIP switch settings then set switches 1 through 4 to OPEN 10 Press the front panel reset switch up once then release it Verify that the...

Page 92: ...4 12 Troubleshooting 8018653 1 1 ...

Page 93: ...mmunica tions Using a lint free cloth and a cleansing fluid one that does not contain abrasives or harsh solvents clean the BSC rack and equipment exteriors every 12 months Inspect the BSC chassis assembly air inlet screens for dust buildup every 6 months Every two years or sooner if the accumulation is enough to significantly block air flow you will need to schedule a complete shutdown of the BSC...

Page 94: ...s Grounded tools Use grounded power tools and tools with uninsu lated handles that can be grounded If tools with insulated handles are used the handles should be treated with an anti static coating Neutralize hand tools before and during use by contacting with a grounded surface Conductive tote boxes and shunts ESDS assemblies should always be stored in conductive trays tote boxes or bags Shorting...

Page 95: ...ance 5 3 5 4 Replacement procedures The following FRUs can be replaced on site refer to figure 5 1 for locations STM CPM E1 module T1 module Instructions for replacing failed FRUs are contained in the following procedures ...

Page 96: ...Subsidiary of HughesAircraft Com pany HUGHES N ETW ORK SYSTEM S CPM CPM OK AL M DE BU G S T A T U S RE SE T OK AL M DE BU G S T A T U S 1 0 RE SE T SW E1 E1 STM STM OK AL M DE BU G S T A T U S RE SE T OK AL M DE BU G S T A T U S 1 0 RE SE T SW E1 E1 T1 CIRCUIT MODULE E1 CIRCUIT MODULE STM CPM Figure 5 1 Circuit module locations ...

Page 97: ...dule is no longer attached to the BSC chassis assembly Caution To avoid damaging the card portion of a circuit module hold only the module s metal frame 3 Fully extend the top and bottom ejector injector handles so that the module is disconnected from the chassis assembly back plane When that happens slide the circuit module out of the chassis and place the module in an ESD protective container 4 ...

Page 98: ...se the front panel reset switch toggle so that it returns to the center position Verify that after approximately 15 seconds the module s status LED readout displays one of the codes listed in table 5 1 9 Close the front rack doors The circuit module is operational verify proper operation with the base station control console BCC operator then refer to section 5 5 Standard HNS return and repair pro...

Page 99: ...r facilities The customer is responsible for shipping insurance and other transportation charges both ways between its facility and HNS repair facility at Germantown Maryland The customer is also responsible for packing any equipment returned to HNS to ensure that the equipment is not damaged in transit to HNS HNS recommends that the original shipping container be retained and used in the event th...

Page 100: ...y a Proforma Invoice listing Part number serial number and nomenclature Country of Origin as marked on the equipment Value for insurance A brief description of symptoms for each return HNS must be notified via FAX or TWX that includes the Airway Bill number of shipment and provided a copy of the Proforma Invoice Domestic Returns Return the equipment to Hughes Network System Inc 11717 Exploration L...

Page 101: ...8018653 1 1 Maintenance 5 9 ...

Page 102: ...ion Subsystem BTS Base Transceiver Station Btu Hr British Thermal Units Per Hour CAP Channel Access Processor CCITT Consultative Committee for International Telegraph and Telephony CCP Call Control Processor CDU Clock Distribution Unit CFM Common Function Module cm Centimeter CPM Control Processor Module CPU Central Processing Unit CTIA Cellular Telecommunications Industry Association CU Channel U...

Page 103: ... IS 54 Electronic Industry Association Interim Standard 54 ISDN Integrated Services Digital Network kg Kilogram LMT Local maintenance Terminal m Meter M C Monitor and Control MDM Modulator Downconverter Module mm Millimeter MS Mobile Station or Mobile Subscriber MSU Multi Subscriber Unit MSC Mobile Switch Center MTSO Mobile Telephone Switch Office NEBS National Equipment Building Standards NEC Nat...

Page 104: ...eturn material Authorization RMC Receive Multicoupler RVC Reverse Voice Channel SACCh Slow Access Control Channel SCA Single Channel Amplifier SOW Statement of Work SS7 Signaling System 7 SPM Slot Processor Module SSU Single Subscriber Unit STM Switch Transcoder Module T1 T1 Module TDMA Time Division Multiple Access TIA Telecommunications Industry Association UMC Universal Monitor and Control VAX ...

Page 105: ...A 4 List of acronyms 8018653 1 1 ...

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