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Hughes Network Systems GMH2000 Installation And Maintenance Manual

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Base Station Controller
Installation and Maintenance Manual
Hughes Network Systems, Inc.
Germantown, Maryland 20876
HNS 8018653
April 11, 1994
Version 1.1
11717 Exploration Lane
(301) 428-5500
HUGHES
NETWORK SYSTEMS
Hughes Aircraft Company
™
Subsidiary of

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  • Page 1 HUGHES NETWORK SYSTEMS Subsidiary of Hughes Aircraft Company ™ 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: Table Of Contents

    Contents About this manual ................xi Introduction................. 1-1 Mobile switching center............1-2 Operations and maintenance center ........1-3 Base station controller............1-4 Base transceiver station............1-4 Antennas ................1-5 RFMC ................1-5 CUMC................1-5 Mobile station ..............1-6 M6100 digital/analog cellular telephone ......1-6 Transceiver unit ...............
  • Page 4 Fault analysis procedure ............. 4-1 Troubleshooting flowcharts..........4-2 Startup diagnostics procedure........... 4-11 Maintenance................5-1 Periodic maintenance............5-1 Electrostatic discharge control ........... 5-2 Required tools for maintenance.......... 5-2 Replacement procedures............. 5-2 Replacing BSC circuit modules ........5-4 Standard HNS return and repair procedure ......5-6 Factory return procedure ..........
  • Page 5 Figures The GMH 2000 digital wireless communications system architecture..............1-1 Alcatel 1000 System 12 distributed switching system (typical)............... 1-3 Operations and Maintenance Center ......... 1-3 BSC equipment rack ..............1-4 BTS stacks (typical) ..............1-5 M6100 telephone and transceiver unit ........1-6 BSC rack shipping configurations ..........
  • Page 6 vi • Figures 8018653 1.1...
  • Page 7 Flowcharts No power to BSC rack .............. 4-3 No power to a single BSC chassis..........4-4 E1 or T1 module failed SUDs ........... 4-5 CPM or STM failed SUDs ............4-5 You are unable to download the online software...... 4-6 You are unable to bring the CCP online ........
  • Page 8 viii • Flowcharts 8018653 1.1...
  • Page 9 Tables 2-1 Initial BSC rack (BS-INIT) components ........2-2 2-2 Expansion BSC rack installation kit (BS-10-EXP) components ................. 2-3 2-3 BSC modules ................2-4 2-4 BSC rack components..............2-5 2-5 Input power cable connections ........... 2-26 2-6 Trunk cable J79, E1 RVS listing by cable connector pin number ................
  • Page 10 x • Tables 8018653 1.1...

  • Page 11: About This Manual

    About this manual The Base Station Controller Installation and Maintenance Manual contains the information necessary to install and maintain the base station controllers used in the GMH 2000 digital cellular communica- tions network. This document describes installing the base station controller (BSC) racks only;...
  • Page 12 • The installation site has been prepared in accordance with the instructions contained in the GMH 2000 Base Station Controller Site Preparation Specifications. • All equipment to be installed is available at the installation site. • All special equipment, tools, and test equipment required for installation and maintenance are available.
  • Page 13 Related publications The following documentation/publications provide additional information about the GMH 2000 digital cellular communications network. Publication 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...
  • Page 14 xiv • About this manual 8018653 1.1...

  • Page 15: Introduction

    Subs idiary ft Comp Aircra Hugh MOBILE STATIONS SUBSCRIBER SETS Figure 1-1. The GMH 2000 digital wireless communications system architecture The terms GHM 2000, M6100, and E-TDMA are trademarks of Hughes Network Systems, Inc. (HNS) 8018653 1.1 Introduction • 1-1...
  • Page 16 The GMH 2000 system supports the following cellular industry standards: • Electronic Industry Association (EIA)/Telecommunications Indus- try Association (TIA) Interim Standard-54 (IS-54). IS-54 Analog is the analog standard for mobile telecommunications, it provides one voice circuit per single RF channel. •...

  • Page 17: Mobile Switching Center

    Mobile switching center The MSC (see figure 1-2) contains an Alcatel 1000 System 12 distributed switching system that interfaces (via E1 trunk circuits) with one or more base station controllers, providing connections between them and the public switched telephone network (PSTN). The MSC processes all requests for calls, controls access to system features, and performs all switching functions.

  • Page 18: Operations And Maintenance Center

    Operations and The operations and maintenance center, shown in figure 1-3, provides maintenance center user-friendly windows and screens that 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.

  • Page 19: Base Station Controller

    Base station controller The BSC (shown in figure 1-4) is responsible for controlling one or more base transceiver stations (via T1 trunk circuits) and providing connec- tions between them and the MSC via E1 trunk circuits. The BSC performs call processing and hand-off procedures together with audio compression and decompression.

  • Page 20: Antennas

    Antennas Each BTS site has a single transmit antenna and two receive antennas. There are several antenna types and configurations that are chosen based on environmental, regulatory, and site-specific requirements. Generally, the omnidirectional antennas used are dipole collinear array types; the sectorized antennas are available as panel or collinear arrays.

  • Page 21: Mobile Station

    CUMC receive functions include the following: • Downconvert the appropriate RF channel under software control. • Demodulate and perform diversity combining. • Based on the operational mode, perform the baseband and error control processing functions on the demodulated signal. • Support control channels, traffic channels, and scanning receivers. M6100 DIGITAL/ANALOG TRANSCEIVER TELEPHONE...

  • Page 22: Transceiver Unit

    Transceiver unit The transceiver provides up to 832 channels with 30 kHz channel sepa- ration (45-MHz duplex spacing). During transmit operations, the transceiver unit digitizes, compresses, and modulates the 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.

  • Page 23: Installing Bsc Hardware

    Chapter 2 Installing BSC hardware This section contains the following procedures for installing BSC modu- lar equipment: • Inspecting and inventorying BSC rack equipment • Unpacking the BSC racks • Installing the initial BSC rack and any expansion BSC racks •...
  • Page 24 Table 2-1. Initial BSC rack ( components BS-INIT) BSC rack End panels Rack door, lefthand 1014338-0001 907016-0019 1016158-0001 (Qty: 1) (Qty: 2) (Qty: 2) H ug S ub ft C si di y of Rack door, righthand 1016157-0001 (Qty: 2) 2-2 •...
  • Page 25 Table 2-2. Expansion BSC rack installation kit ( components BS-10-EXP) BSC rack Rack door, lefthand Rack door, righthand Contact strip 1014338-0001 1016158-0001 1016157-0001 9007016-0015 (Qty: 1) (Qty: 2) (Qty: 2) (Qty: 1) H ug S ub ft C si di y of 8018653 1.1 Installing BSC hardware •...

  • Page 26: Bsc Modules

    Table 2-3. BSC modules T1 interface module 1014904-0002 1013092-0002 1013098-0001 (Qty: Variable) (Qty: Variable) (Qty: Variable) S TM S TM E1 interface module 1013101-0001 (Qty: Variable) 2-4 • Installing BSC hardware 8018653 1.1...

  • Page 27: Tools And Materials Required For Installation

    Table 2-4. BSC rack components Cable assembly Cable assembly CPM blank panel Power/safety ground cable STM blank panel E1/T1 blank panel 1014897-xxxx 1014979-xxxx 1014251-0001 #4 AWG 1014251-0002 1014251-0002 (Qty: Variable) (Qty: Variable) (Qty: Variable) (Qty: 650 feet/198 meters) (Qty: Variable) (Qty: Variable) Tools and materials The following are required:...

  • Page 28: Unpacking The Bsc Rack

    • Level, 2-foot (or metric equivalent) • Pallet truck (for moving equipment racks) • Cable ties and adhesive-backed mounts Unpacking the BSC rack The BSC rack is shipped in one of two configurations (see figure 2-1): • Configuration 1: The BSC rack is mounted on a pallet and is protected by a moisture barrier, sleeve, cap, and restraint bands.

  • Page 29: Unpacking A Configuration #1 Shipment

    Unpacking a Perform the following steps to unpack the BSC equipment racks. configuration #1 shipment Using a pair of diagonal cutters, cut and remove the restraint bands from the pallet (see figure 2-2). Using a cross-tip screwdriver, remove the screws attaching the sleeve to the pallet (see figure 2-2 for locations).

  • Page 30: Moisture Barrier Removal

    A ir c ra ft C id ia MOISTURE BARRIER BSC RACK Figure 2-3. Moisture barrier removal Remove the moisture barrier from the pallet (see figure 2-3 for locations). 2-8 • Installing BSC hardware 8018653 1.1...

  • Page 31: Foam Brace Removal

    A ir a ft id ia FOAM SLEEVE BRACE A SS C IR A SS A SS A SS C IR A SS A SS Figure 2-4. Foam brace removal Remove the foam brace from the BSC rack (see figure 2-4). 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).

  • Page 32: Sleeve Brace And Bracket Removal

    FRONT SLEEVE BRACES LAG BOLT Figure 2-5. Sleeve brace and bracket removal Using a socket wrench with a 1/4-inch socket, remove the lag bolts attaching the four brackets to the pallet (see figure 2-6). 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).

  • Page 33: Bracket Removal

    3/8-INCH BOLT LAG BOLT BRACKET (4 PLACES) Figure 2-6. Bracket removal 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.

  • Page 34: Moving The Bsc Rack From Pallet To Pallet Truck

    Continue doing this as you walk the rack to the edge of the pallet. 11. While two installers stabilize the rack, the other two should rotate one side of the rack off the pallet and onto the pallet truck (see figure 2-7). A ir c ra ft C...

  • Page 35: Bsc Rack Leveling Feet Locations

    15. 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 different axes—shows that the rack is plumb (see figure 2-9).

  • Page 36: Verifying That The Bsc Rack Is Plumb

    LEVEL MUST BE USED IN BOTH AXES: X 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 Note Leave approximately 1/4 inch (5 mm) of space between each rack when you install it (see figure 2-10). 1 / 4 Figure 2-10. Spacing between multiple BSC racks 8018653 1.1 Installing BSC hardware • 2-15...
  • Page 38 Unpacking a Perform the following steps to unpack the BSC equipment racks. configuration #2 shipment Using a pair of diagonal cutters, cut and remove the restraint bands from the pallet (see figure 2-11). A ir c ra ft C id ia RESTRAINT BANDS PALLET...

  • Page 39: Moisture Barrier Removal

    A ir c ra ft C id ia MOISTURE BARRIER BSC RACK Figure 2-12. Moisture barrier removal Remove the moisture barrier from the pallet (see figure 2-12 for locations). 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 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). Using a socket wrench with a 1/4-inch socket, remove the lag bolts attaching the four brackets to the pallet (see figure 2-6). Using a socket wrench with a 3/8-inch socket, remove the bolts and lock outs attaching the four brackets to the BSC rack (see figure 2-6).
  • Page 41 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. Use the floorplan supplied in the Site Planning Guide (customer's documentation package) to determine where the equipment racks are to be situated.

  • Page 42: Anchoring Multiple Bsc Racks

    Anchoring multiple BSC Install two 10 X 100 hex-head mounting screws through the racks bottom side frames of the first pair of BSC racks, as shown in figure 2-13. MOUNTING HARDWARE 9007016-0013 9004651-0255 SPACER 9007016-0017 CONTACT (2 PLACES) ANGLE 9007016-0016 MOUNTING HARDWARE 9007034-0005...
  • Page 43 Install an M10 washer and hex nut onto the mounting screws (see figure 2-13). Hand-tighten the mounting hardware. Insert spacers between the rack frames so that the slots in the spacers fit over the screw shafts (see figure 2-13). Insert a contact angle between the rack frames (see figure 2-13). SPACER 9007016-0017 (2 PLACES)

  • Page 44: Installing Cable Ladders

    Install an M10 washer and hex nut onto the mounting screws (see figure 2-14). Hand-tighten the mounting hardware. Insert spacers between the rack frames so that the slots in the spacers fit over the screw shafts (see figure 2-14). Using a 2/5-inch (8-mm) hex wrench, tighten first the top mounting screws, then the bottom mounting screws until the racks draw against the spacers and contact strip.
  • Page 45 SOURCE VOLTAGE SUPPLY LINES CIRCUIT BREAKERS PDU CIRCUIT A TB1-1 (-48 VDC) CABLE TB1-1 CHASSIS 1 SWITCH/ TB1-2 (RTN) CABLE CIRCUIT BREAKER TB1-2 SAFETY GROUND CABLE TB2-1 (-48 VDC) CABLE TB2-1 CHASSIS 2 SWITCH/ TB2-2 (RTN) CABLE CIRCUIT BREAKER TB2-2 SAFETY GROUND CABLE TB3-1 (-48 VDC) CABLE TB3-1...
  • Page 46 Set all BSC rack power distribution unit (PDU) front panel power switches to OFF (see figure 2-16 for locations). S IS C IR S IS S IS CIRCUIT A CHASSIS 1 SWITCH S IS CIRCUIT A C IR CHASSIS 2 SWITCH S IS S IS CIRCUIT A...

  • Page 47: Pdu Terminal Block Slot Locations

    Locate the cable labeled TB1-2 (RTN) and install it into the PDU terminal block slot labeled TB1-2. TB1-1 TB2-1 TB3-1 TB1-2 TB2-2 TB3-2 TB4-1 TB5-1 TB6-1 TB4-2 TB5-2 TB6-2 Figure 2-17. PDU terminal block slot locations 8018653 1.1 Installing BSC hardware • 2-25...
  • Page 48 Figure 2-18. Terminal block cable clamp screw location Attach a terminal lug to the safety ground cable labeled E1 (GND) (see figure 2-19 for locations). 2-26 • Installing BSC hardware 8018653 1.1...
  • Page 49 Use a 9/16-inch (or metric equivalent) wrench to install safety ground cable E1 (GND) and 9/16-inch mounting hardware onto PDU grounding stud E1 (see figure 2-19 for locations). SAFETY GROUND TERMINAL LUG CABLE 9006945-0002 (FROM INSTALLATION KIT) GROUNDING STUD E1 GROUNDING STUD HARDWARE GROUNDING...

  • Page 50: Installing The External Lan Cable

    If there are no expansion BSC racks to install, continue on to section 2.7, “Installing BSC LAN cables.” Otherwise, repeat steps 2 through 7 to install power and ground cables onto the remaining BSC racks. Installing the external LAN This section describes installing the external LAN cable that connects the cable BSC to the BSC LAN repeater (see figure 2-20).
  • Page 51 CONNECTOR Figure 2-21. Connector J83 location 8018653 1.1 Installing BSC hardware • 2-29...

  • Page 52: Floor Access Installation Procedure

    Floor access installation Remove the terminator from connector J83 (shown in procedure figure 2-21) on the backplane of the bottom BSC chassis (chassis #3 on the initial BSC rack). Install the BNC-type connector of the BSC external LAN cable to J83. Install a terminator onto connector J83 on the backplane of the top BSC chassis (chassis #1 on the initial BSC rack).

  • Page 53: Installing E1/T1 Trunk Cables

    Installing E1/T1 trunk This section describes assembling and installing the E1/T1 trunk cables. cables Use the information contained in figures 2-22 and 2-23, and table 2-6 to install the trunk cables. Refer to the Site Preparation document for specific trunk cable routing information.

  • Page 54: E1/T1 Trunk Cable Connectors

    T1 RVS CONNECTOR J87 E1/T1 FWD CONNECTOR J80 T1 FWD CONNECTOR J86 E1/T1 RVS CONNECTOR J79 Figure 2-23. E1/T1 trunk cable connectors 2-32 • Installing BSC hardware 8018653 1.1...

  • Page 55: Trunk Cable J79, E1 Rvs Listing By Cable Connector Pin Number

    Table 2-6. Trunk cable J79, E1 RVS listing by cable connector pin number Trunk Module Backplane Backplane Wire Color Code Number Slot/Port Signal Name Conn#.Pin# Solid/Stripe E1-01 13/1 RVS RING 25 J79.01 White/Blue RVS TIP 25 J79.02 Blue/White E1-00 13/0 RVS RING 24 J79.03 White/Orange...
  • Page 56 Table 2-6. Trunk cable J80, E1 FWD listing by cable connector pin number (Cont.) Trunk Module Backplane Backplane Wire Color Code Number Slot/Port Signal Name Conn#.Pin# Solid/Stripe E1-01 13/1 FWD RING 25 J80.01 White/Blue FWD TIP 25 J80.02 Blue/White E1-00 13/0 FWD RING 24 J80.03...
  • Page 57 Table 2-6. Trunk cable J86, T1 FWD listing by cable connector pin number (Cont.) Trunk Module Backplane Backplane Wire Color Code Number Slot/Port Signal Name Conn#.Pin# Solid/Stripe T1-00 FWD RING 00 J86.01 White/Blue FWD TIP 00 J86.02 Blue/White T1-01 FWD RING 01 J86.03 White/Orange FWD TIP 01...
  • Page 58 Table 2-6. Trunk cable J87, T1 RVS listing by cable connector pin number (Cont.) Trunk Module Backplane Backplane Wire Color Code Number Slot/Port Signal Name Conn#.Pin# Solid/Stripe T1-00 RVS RING 00 J87.01 White/Blue RVS TIP 00 J87.02 Blue/White T1-01 RVS RING 01 J87.03 White/Orange RVS TIP 01...
  • Page 59 Table 2-6. Trunk cable J79, T1 RVS listing by cable connector pin number (Cont.) Trunk Module Backplane Backplane Wire Color Code Number Slot/Port Signal Name Conn#.Pin# Solid/Stripe Future Expansion RVS RING 14 J79.24 Black/Orange T1-14 RVS TIP 14 J79.25 Orange/Black Future Expansion RVS RING 15 J79.22...

  • Page 60: Cable Routing

    BACKPLANE SHIELD CABLE POST FIgure 2-24. Cable routing 2-38 • Installing BSC hardware 8018653 1.1...

  • Page 61: Activating The Bsc Rack

    Activating the BSC rack Perform the following procedure to apply power to the BSC rack equip- ment. Open the front doors on the BSC rack. Set the following PDU power switches to ON: Note Your BSC rack may not have the circuit B - 48 Vdc supply line installed or may not be using all three BSC chassis.

  • Page 62: Bsc Chassis Assemblies

    A ir c ra ft C id ia C IR C IR BSC CHASSIS ASSEMBLIES 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...

  • Page 63: Bsc Chassis Assembly Circuit Module Slot Designations

    Table 2-7. BSC chassis assembly slot designations BSC Slot Number Module type 1 through 7 top T1 interface modules 8 top Either a T1 or an E1 interface module 9 through 13 top E1 interface modules 1 and 2 bottom Reserved for future expansion 3 and 4 bottom CPM GRP configuration...

  • Page 64: Installing T1 Interface Modules

    Installing T1 interface Perform the following procedure to install T1 modules into the BSC modules chassis assembly. Caution Wear an electrostatic discharge (ESD) wrist strap at all times while handling circuit modules. Attach the strap’s alligator clip to an unpainted metal surface on the rack or one of the BSC chassis frames.
  • Page 65 Press the front panel reset switch toggle down until it remains in the down position (see figure 2-28 for locations). LAMP LAMP STATUS LED READOUT RESET SWITCH DEBUG PORT Figure 2-28. Module front panel Slide the module into the slot until it makes contact with the backplane.

  • Page 66: Installing E1 Interface Modules

    Installing E1 interface Perform the following procedure to install E1 modules into the BSC modules chassis assembly. Remove an E1 interface module (see table 2-1) from its ship- ping container. Save the container. Press the front panel reset switch toggle into the down position. Install the module into slot 13 (top).

  • Page 67: Installing Cpms In Ccp Slots

    Set module front panel DIP switches to the startup diagnostics (SUDs) setting shown in figure 2-29. Black square indicates side of switch that is pressed inwards Figure 2-29. Front panel DIP switches setting for SUDs Release the front panel reset switch toggle so that it returns to the center position.

  • Page 68: Installing Cpms In Cap Slots

    12. Type 1, then press [Return] to select Switched In. 13. Set module front panel DIP switches to the SUDs setting shown in figure 2-29. 14. Release the front panel reset switch toggle so that it returns to the center position. Verify that the status LED readout displays a P after completing SUDs, then displays a d.

  • Page 69: Installing Switching Transcoder Modules

    Installing switching Perform the following procedure to install switching transcoder modules transcoder modules (STMs) into the BSC chassis assembly. Remove an STM (see table 2-1) from its shipping container. Save the container. Press the front panel reset switch toggle into the down position. Install the module into slot 14 of the card cage.

  • Page 70: Blank Panel

    f t C i d i BLANK PANEL CAPTIVE SCREWS Figure 2-30. Blank panel 2-48 • Installing BSC hardware 8018653 1.1...

  • Page 71: Assigning Bsc Chassis Identification Codes

    Refer to section “Commissioning” in the GMH 2000 Local Maintenance Terminal (LMT) Operator’s Reference Manual (document 8019007) for information on commissioning the BSC. Then continue on to section 2.10, “Assigning BSC chassis identification codes” in this document. 2.11 Assigning BSC chassis BSC racks are numbered starting from the initial BSC rack, as shown in identification codes figure 2-31.
  • Page 72 The following steps describe assigning ID codes to the three BSC chassis inside BSC rack #1 (the initial BSC rack). Repeat this procedure to assign ID codes to the BSC chassis assemblies inside the expansion BSC racks. 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.
  • Page 73 BLACK RECTANGLE INDICATES SIDE OF SWITCH THAT IS PRESSED INWARDS. BSC CHASSIS ASSEMBLY BACKPLANE Figure 2-32. BSC chassis ID setting 8018653 1.1 Installing BSC hardware • 2-51...

  • Page 74: Bsc Chassis Assembly Identification Codes

    Table 2-8. BSC chassis assembly identification codes BSC rack BSC chassis DIP switch S1 settings BSC rack BSC chassis DIP switch S1 settings Black square indicates side of Black square indicates side of number ID code number ID code switch that is pressed inwards switch that is pressed inwards initial rack expansion rack...

  • Page 75: Activation And Shutdown

    Chapter 3 Activation and shutdown This section contains information required to activate, deactivate, or restart the BSC rack. Activation Once the BSC rack has been installed and commissioned, no operator action is required under normal conditions; the BSC is designed for unattended operation.

  • Page 76: Bsc Module Led Codes

    section “BSC module LED codes,” for descriptions of the different module operating modes. BSC module LED codes Each BSC module has a front panel light-emitting diode (LED) status display that consists of a dot LED and a seven-segment alphanumeric LED, as shown in figure 3-1. ALPHANUMERIC Figure 3-1.
  • Page 77 Table 3-2. BSC module LED status display codes Display Code Mode Description Switched-In, In Service The module is a primary and is transmitting data, receiving data, and otherwise functioning normally. Switched-In, Out Of Service The module has been prohibited from providing services to users and network components.

  • Page 78: Bsc Rack Shutdown

    BSC rack shutdown Perform the following procedure to deactivate the entire BSC rack: Open the front doors on the BSC rack. Set the following PDU power switches to OFF: • CIRCUIT A CHASSIS 1 switch • CIRCUIT A CHASSIS 2 switch •...

  • Page 79: Restarting The Bsc Rack

    WARNING To completely remove power from a BSC chassis, both circuit A and circuit B switches must be set to OFF. Verify that the OK lamps on all circuit modules in the chassis assembly are extinguished. Verify that the fans in the fan tray directly below the chassis assembly stop turning.
  • Page 80 3-6 • Operation and shutdown 8018653 1.1...

  • Page 81: Troubleshooting

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

  • Page 82: Troubleshooting Flowcharts

    ALFUNCTION HEET RMA # Part Serial Number Number Date Technician Did module fail out of box? Did module pass SUDs? Status LED error code What version of firmware did the module fail with? If the failed module was a CPM, indicate the processor type Indicate slot number of failed CPM or STM (slot number is printed on front of chassis) What was the front panel DIP switch setting? 1____ 2____ 3____ 4____ (Open/Closed)
  • Page 83 You are unable to establish T1 lines You are unable to establish E1 lines The STMs fail to come online and stay online Start Perform procedures in section 3.1, "Activation" to verify that PDU power switches are set to ON. Has power been restored BSC rack is operational.
  • Page 84 Start Perform procedures in section 3.1, "Activation" to verify that appropriate PDU power switches are set to ON. Has power BSC chassis is been restored operational. to chassis? Has power BSC chassis is been restored operational. to chassis? cooling fans The malfunctioning operating in the chassis...
  • Page 85 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 4-3. E1 or T1 module failed SUDs Start Write the Error Code on the malfunction report, then refer to chapter 5, "Maintenance,"...
  • Page 86 Start Try downloading the online Reset the GRP via the front software again. panel switch. System is Problem System is Problem operational. solved? solved? operational. Remove malfunctioning Check LAN connections for GRP from the BSC proper termination. chassis; wait 30 seconds, then install it back into its slot.
  • Page 87 Start Problem System is Reset the CCP via the front operational. solved? panel switch. System is Problem Remove suspect CCP solved? operational. from the BSC chassis; wait 30 seconds, then install it back into its slot. Check LAN connections for proper termination.
  • Page 88 Start Problem System is Check T1 cabling from the back of the BSC to operational. solved? the patch panel rack. System is Problem Swap out the solved? operational. associated T1 card with a functional T1 card. Remove unused CCPs, CAPs, and STMs from BSC and unplug associated CAP Problem System is...
  • Page 89 Start Perform the steps Check E1 cabling from the back of the BSC to listed in section 4.3, the patch panel rack. "Startup diagnostics procedure" on associated CCP, System is Problem CAP, and T1 cards. solved? operational. Write the Error Code on the malfunction report, then refer to SUDs...
  • Page 90 Start Perform the steps Verify that the system configuration has a Central Service Module assigned to one of the listed in section 4.3, CAPs. "Startup diagnostics procedure" on associated CCP, Problem System is CAP, and T1 cards. operational. solved? Write the Error Code on the malfunction report, then refer to SUDs...

  • Page 91: Startup Diagnostics Procedure

    Startup diagnostics Connect a VT100-type terminal interface cable to the debug procedure port on the front panel of the module being tested. Press the [Return]—or [Enter]—key on the terminal to begin the SUDs process. Type 4, then press [Return] to Change Port0 State. Type 1, then press [Return] to select Maintenance.
  • Page 92 4-12 • Troubleshooting 8018653 1.1...

  • Page 93: Maintenance

    Chapter 5 Maintenance This section describes periodic maintenance procedures for BSC rack equipment, and removal and replacement procedures for BSC field- replaceable units (FRUs). Before replacing any BSC hardware, read the information contained in section “Electrostatic discharge control” for procedures on handling electrostatic discharge sensitive (ESDS) equipment.

  • Page 94: Electrostatic Discharge Control

    Electrostatic discharge BSC equipment electronic assemblies can be damaged by electrostatic control discharge (ESD) if they are removed from their chassis enclosures with- out protective measures. These protective measures include: • Grounded wrist straps—Technicians handling ESDS items in an ESD environment should wear skin-contact wrist straps. The wrist strap alligator clip should connect to an unpainted metal surface on the BSC rack or one of the BSC chassis frames.

  • Page 95: Replacement Procedures

    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. 8018653 1.1 Maintenance • 5-3...

  • Page 96: Circuit Module Locations

    T1 CIRCUIT MODULE E1 CIRCUIT MODULE f t C i d i S IS C IR S IS S IS A LM R ES D EB S IS C IR A LM S IS R ES S IS D EB A LM R ES D EB...

  • Page 97: Replacing Bsc Circuit Modules

    Replacing BSC circuit If you isolate a problem to an STM, CPM, E1, or T1 circuit module (see modules figure 5-1 for locations), the entire module must be replaced as follows: Caution Wear an electrostatic discharge (ESD) wrist strap at all times while handling BSC circuit modules.

  • Page 98: Ejector/Injector Operation

    Insert the replacement circuit module into the same slot of the BSC chassis assembly from which the defective module was removed. Extend the upper and lower ejector/injectors as shown in figure 5-3. EJECTOR/INJECTOR CLOSED EJECTOR/INJECTOR EXTENDED Figure 5-3. Ejector/injector operation Slide the module into the slot until it makes contact with the backplane.

  • Page 99: Standard Hns Return And Repair Procedure

    Standard HNS return and The following information applies to repairs for equipment that are out repair procedure of warranty. Note An item is considered “out-of-warranty” if the warranty period (as determined by the original purchase) has expired; or the equipment has been damaged or otherwise made unusable as a result of an accident or unreasonable use, neglect, improper or unauthorized service, repairs or...

  • Page 100: Domestic Returns

    • Part number, serial number, nomenclature, and brief description of symptoms for each piece of equipment being returned. • Customer’s purchase order number to cover the cost of repair (only required for equipment not within their warranty period) • How the customer will be shipping the equipment to HNS •...
  • Page 101 8018653 1.1 Maintenance • 5-9...

  • Page 102: Acronyms And Abbreviations

    Appendix A Acronyms and abbreviations Analog Control Channel AMPS Advanced Mobile Phone Service AMPS-D Advanced Mobile Phone Service, Digital ANSI American National Standards Institute ASRC Analog Scanning Receiver Channel Auto Tuned Combiner A/T/C Analog Traffic Channel American Wire Gauge Base Control Console Base Control Processor Bus Repeater Module Base Station Controller...
  • Page 103 Fixed Tuned Combiner Forward Voice Channel General Motors Hughes GNSC Gateway MSC Global Resource Processor Groupe Special Mobile Home Locator Register Hughes Network Systems, Inc. IS-54 Electronic Industry Association Interim Standard-54 ISDN Integrated Services Digital Network Kilogram Local maintenance Terminal Meter M&C...
  • Page 104 Power Distribution Unit PLMN Public Land Mobile Network PSTN Public Switch Telephone Network QACU Quad Analog Channel Unit QATC Quad Analog Traffic Channel RECC Reverse Analog Control Channel RFMC Radio Frequency Modular Cabinet Return material Authorization Receive Multicoupler Reverse Voice Channel SACCh Slow Access Control Channel Single Channel Amplifier...
  • Page 105 A-4 • List of acronyms 8018653 1.1...

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