SECTION 9 Installing the LGCell This section contains the following: • Section 9.1 Inspecting Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2 • Section 9.2 Installing the Main Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 • Section 9.2.5 Connecting Multiple LGCell Systems . . . . . . . . . . . . . . . . . . . 9-14 • Section 9.3 Installing the Expansion Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17 • Section 9.
Installing the LGCell 9.1 Inspecting Shipment Follow this procedure before installing LGCell equipment: 9-2 1. Verify the number of packages received against the packing list. 2. Check all packages for external damage; report any external damage to the shipping carrier. If there is damage, a shipping carrier agent should be present before unpacking and inspecting the contents because damage caused during transit is the responsibility of the shipping agent. 3.
Installing the Main Hub 9.2 9.2.1 Installing the Main Hub Main Hub Installation Checklist Installation Requirement Consideration Floor Plans Installation location of equipment clearly marked Main Hub Same frequency and protocol as Expansion Hub(s) AC power available Power cord is 2 m (6.5 ft) long • 117V AC, 0.3 amp @ 60 Hz • 230V AC, 0.15 amp @ 50 Hz Rack space available 4.4 cm (1.75 in.) high Clearance for air circulation 7.6 cm (3 in.
Installing the LGCell Installation Requirement Consideration Distances Main Hub is within 3–6m (10–20 ft) of connecting repeater Main Hub is within 3–6m (10–20 ft) of connecting base station If longer distance, determine the loss of the cable used for this connection and adjust the RF signal into the Main Hub accordingly. This can be done by readjusting the power from the base station, or by changing the attenuation value between the base station/repeater and the Main Hub.
Installing the Main Hub 9.2.3 Main Hub Installation Procedures Procedures in this section: • Installing the Main Hub in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5 • Connecting Power and Powering Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6 • Installing an Optional Cable Manager in a Rack . . . . . . . . . . . . . . . . . . . . . . . . 9-6 • Connecting the MMF cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the LGCell Connecting Power and Powering Up After mounting the Main Hub in the rack, connect AC power. You may use multiple outlet surge protectors for multiple Main Hubs. 1. Connect the AC power cord to the Main Hub (labeled 1 on the following figure). 2. Plug the power cord into an outlet providing AC power. TO EXPANSION HUB PORTS LINK STATUS SYNC DOWN 1 3.
Installing the Main Hub Connecting the MMF cables Before connecting the MMF cables, confirm that the optical loss does not exceed 3 dB optical. If fiber distribution panels are used, confirm that the total optical loss of fiber cable, from the Main Hub through distribution panels and patch cords to the Expansion Hub, does not exceed 3 dB optical. Connect all MMF cables (two per port) to the MMF ST female optical connectors (labeled DOWN and UP) on the Main Hub front panel. Use any available Main Hub port.
Installing the LGCell Check the Main Hub Functionality LEDs The unit functionality LEDs (POWER and SYNC) should be green. If not, cycle the power to reset the Main Hub. Check the Main Hub MMF Port LEDs The MMF port LEDs (LINK STATUS and SYNC) should be red. This indicates that the other end of the MMF cable is not yet connected to the Expansion Hub ports. NOTE: Refer to Section 10 for troubleshooting LEDs. NOTE: You do not have to use all of the MMF ports on the Main Hub.
Installing the Main Hub 9.2.4 Interfacing LGCell to Base Stations WARNING: Exceeding the maximum input power could cause failure of the Main Hub (refer to Section 7.1 on page 7-3 for maximum power ratings). Attenuators may be required to limit the maximum composite power into the Main Hub. Connecting a Main Hub to a Roof-top Antenna LGC Wireless recommends that you use a lightning arrestor or surge protector in a roof-top antenna configuration.
Installing the LGCell Connecting a Main Hub to an In-Building Base Station Connecting a Simplex Base Station to a Main Hub: 1. Connect an N-male to N-male coaxial cable to the transmit simplex connector on the base station. 2. Connect the other end of the N-male to N-male coaxial cable to the FORWARD simplex connector on the Main Hub. 3. Connect an N-male to N-male coaxial cable to the receive simplex connector on the base station. 4.
Installing the Main Hub Connecting a Duplex Base Station to a Main Hub: When connecting to a duplex base station, it is recommended that you use a circulator and connect to the simplex ports on the Main Hub. You can insert attenuators between the base station and circulator, and between the circulator and Main Hub as needed; refer to Section 7.5.1 on page 7-45 for more information. 1. Connect an N-male to N-male coaxial cable to the duplex connector on the base station. 2.
Installing the LGCell Using the Duplex Port to Increase Gain on the Uplink Because some types of LGCells have duplex ports with gains of 0, 30, or 40 dB, depending on the frequency and protocol, you can use the simplex forward port for the downlink signals and the duplex port for the uplink signals when gain on the uplink is desired. Duplex port gain is shown in the table in Figure 9-3. Connecting a Duplex Base Station to the LGCell Duplex/Simplex Ports: 1.
Installing the Main Hub Connecting a Simplex Base Station to the LGCell Duplex/Simplex Ports: 1. Connect an N-male to N-male coaxial cable to the transmit connector on the base station. 2. Connect the other end of the N-male coaxial cable to the FORWARD simplex connector on the Main Hub. 3. Connect an N-male to N-male coaxial cable to the receive connector on the base station. 4. Connect the other end of the N-male coaxial cable to the DUPLEX connector on the Main Hub.
Installing the LGCell 9.2.5 Connecting Multiple LGCell Systems You can use power combiners/dividers as dividers to connect multiple LGCells in order to increase the total number of RAUs in a system. You can use power combiners/dividers to combine base station channels in order to increase the number of RF carriers the system transports. 9.2.5.1 Connecting Two LGCells Connecting two LGCells increases the total number of supportable RAUs from 16 to 32.
Installing the Main Hub Connecting Two LGCells 9.2.5.2 1. Connect the DUPLEX, FORWARD, or REVERSE connector of one of the Main Hubs to an input/output port on the power combiner/divider using an N-male to N-male coaxial cable jumper. 2. Connect the DUPLEX, FORWARD, or REVERSE connector of the second Main Hub to the second input/output port on the power combiner/divider using an N-male to N-male coaxial cable jumper. 3.
Installing the LGCell 9.2.6 Installing Main Hubs in a Neutral Host System Installing Main Hubs in a neutral host system is the same as described in Section 9.2.3 on page 9-5. We recommend mounting all neutral host system Main Hubs in the same rack(s), grouped by frequency or carrier. For example, group the Main Hubs for the iDEN carrier(s) together, then the 800 MHz cellular carrier(s), and so on. Connecting to base stations and repeaters is the same as described in Section 9.2.
Installing the Expansion Hub 9.3 Installing the Expansion Hub 9.3.1 Expansion Hub Installation Checklist Installation Requirement Consideration Floor Plans Installation location of equipment clearly marked Expansion Hub Same frequency and protocol as Main Hub AC power available Power cord is 2 m (6.5 ft) long • 117V AC, 0.70 amp @ 60 Hz • 230V AC, 0.35 amp @ 50 Hz Rack space or wall mount location available 4.4 cm (1.75 in.) high, 1U; Clearance: 3 in.
Installing the LGCell 9.3.3 Expansion Hub Installation Procedures Procedures in this section: • Installing the Expansion Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-18 • Connecting Power and Powering Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20 • Connect the MMF cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-21 • Check the Expansion Hub Unit Functionality LEDs . . . . . . . . . . . . . . . . . . .
Installing the Expansion Hub Refer to the following figure for wall mounting options. 3. Drill the screw holes in the wall and insert the anchors. 4. Attach the Expansion Hub to the wall with the screws. CAUTION:Mounting the Expansion Hub facing up exposes the connectors to falling dust and debris. Mounting it facing down exposes the fan to falling dust and debris. PN 8100-40 620004-0 Rev. B Help Hot Line (U.S.
Installing the LGCell Connecting Power and Powering Up After mounting the Expansion Hub, connect the AC power. 1. Connect the AC power cord to the Expansion Hub (labeled 1 on the following figure). 2. Plug the power cord into an outlet providing AC power. LINK STATUS SYNC 3. 9-20 ANTENNA PORTS DOWN UP SYNC POWER MAIN HUB PORT LGCellTM Expansion Hub AC POWER Flip the Expansion Hub’s power switch from position 0 to position 1 (labeled 2 on the figure.
Installing the Expansion Hub Connect the MMF cables Before connecting the MMF cables, confirm that the optical loss does not exceed 3 dB optical. If fiber distribution panels are used, confirm that the total optical loss of fiber cable, from the Main Hub through distribution panels and patch cords to the Expansion Hub, does not exceed 3 dB optical. Connect all MMF cables from the Main Hub to the Expansion Hub(s).
Installing the LGCell Check the Expansion Hub Unit Functionality LEDs The unit functionality LEDs (POWER and SYNC) should be green if the Main Hub is on. Check the Expansion Hub MMF Port LEDs The MMF port LEDs (LINK STATUS and SYNC) should be red. This indicates that the UTP/STP cable is not yet connected to the Remote Access Unit(s). Check the Main Hub MMF Port LEDs The MMF port LEDs (LINK STATUS and SYNC) should be green. NOTE: Refer to Section 10 for troubleshooting LEDs. 9-22 LGCell 4.
Installing the Expansion Hub Connect UTP/STP cables from the RAUs Before connecting the UTP/STP cables, confirm that they meet TIA/EIA 568-A specifications (refer to Appendix B). Connect all UTP/STP cables coming from the RAUs to any available RJ-45 connector on the Expansion Hub, as shown in the following figure. Make sure you connect RAUs that are of the correct frequency and protocol.
Installing the LGCell 9.3.4 Installing Expansion Hubs in a Neutral Host System Installing neutral host system Expansion Hubs is the same as described in Section 9.3.3 on page 9-18. If rack-mounting the Expansion Hubs, we recommend mounting all neutral host system hubs in the same rack(s) or location, grouped by frequency or carrier. For example, group the Expansion Hubs for the iDEN carrier(s) together, then the 800 MHz cellular carrier(s), and so on. 9-24 LGCell 4.
Installing the Remote Access Unit 9.4 Installing the Remote Access Unit 9.4.
Installing the LGCell 9.4.3 RAU Installation Procedures Procedures in this section: • Mounting RAUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26 • Connecting the Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28 • Installing Passive Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28 • Connecting the UTP/STP Cable . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Remote Access Unit Installing RAUs using a Mounting Plate You can install up to four RAUs using a Quad-RAU Mounting Plate (LGC Wireless part number MP-RAU-4). Installing RAUs on the Mounting Plate: After the Mounting Plate is securely installed, you can attach up to four RAUs to it. • Slide an RAU into a Mounting Plate slot so the edge of the RAU meets the tab on the Mounting Plate. RAUs can be installed with either end against the tab.
Installing the LGCell Installing Passive Antennas Refer to the manufacturer’s installation instructions to install passive antennas. Passive antennas are usually installed below the ceiling. If they are installed above the ceiling, the additional loss due to the ceiling material must be considered when estimating the antenna coverage area. Considerations: • Use coaxial cable with the least amount of loss possible. • Keep iDEN and 800 MHz cellular antennas 6 to 8 meters (20 to 26 ft) apart.
Installing the Remote Access Unit Connecting the UTP/STP Cable Connecting UTP/STP to single band RAU: Before connecting the UTP/STP cables, confirm that they meet TIA/EIA 568-A specifications (refer to Appendix B). Connect the UTP/STP cable coming from the Expansion Hub to the RJ-45 female jack on the RAU, as shown in the following figure.
Installing the LGCell Check the RAU LEDs The green POWER LED should be on and the red SYNC LED should be off. Power LED Sync LED The green POWER LED should be lit to indicate that the RAU is receiving power from the Expansion Hub assigned to it. The green POWER LED should be off if the Expansion Hub is not yet connected. NOTE: Refer to Section 10 for troubleshooting LEDs. Check the Expansion Hub MMF Port LEDs Re-check the Expansion Hub LEDs to verify that the RAUs are operating properly.
Installing the Remote Access Unit 9.4.4 Installing Remote Access Units in a Neutral Host System When installing both iDEN and cellular systems in parallel, either as dual-band or neutral host systems, special provision must be taken to assure that the individual RAUs do not interfere with each other. It is recommended that the 800 MHz cellular and iDEN RAU’s antennas be separated by 6 to 8 meters (20 to 26 feet), to assure that the iDEN downlink signals do not interfere with the cellular uplink signals.
Installing the LGCell 9-32 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40 620004-0 Rev.
Maintenance, Troubleshooting, and Technical Assistance SECTION 10 There are no user-serviceable parts in any of the LGCell components. Faulty or failed components are fullly replaceable through LGC Wireless. 10.1 Address 2540 Junction Avenue San Jose, California 95134-1902 USA Phone 1-408-952-2400 Fax 1-408-952-2410 Help Hot Line 1-800-530-9960 (U.S. only) +1-408-952-2400 (International) +44(0) 1223 597812 (Europe) Web Address http://www.lgcwireless.com e-mail service@lgcwireless.
Maintenance, Troubleshooting, and Technical Assistance 10.2 Troubleshooting NOTE: LGCell has no user-serviceable parts. Faulty or failed units are fully replaceable through LGC Wireless. Sources of potential problems include: • Malfunction of one or more LGCell components • Faulty cabling/connector • Antenna, base station, or repeater problem • External RF interface NOTE: Faulty cabling is the cause of a vast majority of problems. All Cat-5 cable should be tested to TIA/EIA 568-A specifications.
Troubleshooting 10.2.1 Troubleshooting Guidelines The following table contains troubleshooting information that the diagnostic LEDs do not cover. Please check the table for a possible cause of a problem. Simple checks or minor adjustments might eliminate the problem and restore proper operation. Problem/Symptom Check No downlink signal output when all diagnostic LEDs are green Make sure that there is a reasonable amount of power at the input of the Main Hub.
Maintenance, Troubleshooting, and Technical Assistance 10.2.2 10.2.2.1 Troubleshooting Using the LED Indicators LED Indicator Description The LGCell Main Hub, Expansion Hubs, and RAUs have front panel LEDs which provide diagnostic information and operational status of each unit. Together they provide an efficient diagnostic display system, which help technicians find the fault if there is a malfunction. The LED indicators for each unit are described in the following table.
Troubleshooting 10.2.2.2 Diagnostic Procedures Use the following table when diagnosing system problems. For troubleshooting, you can copy the blank table on page 10-8 and use it to record the LED colors on the Main Hub, the particular Expansion Hub indicating a fault, and the RAUs connected to it. This is necessary because the Main Hub, Expansion Hubs, and RAUs typically are geographically distributed. To determine where the fault might be: 1. 2. 3. 4. 5. Go to the Main Hub and record the LEDs.
Maintenance, Troubleshooting, and Technical Assistance Notes: 1. System is functioning properly. 2. The Expansion Hub is off. Make sure the power cord is connected to a live AC power jack and that the Expansion Hub power switch is in the on (1) position. 3. Power is being delivered to the RAU but it is not turning on. 4. a. Check that the UTP/STP cable has been properly crimped and passes a standard TIA/EIA 568-A Cat-5 compliance test. b. If the cable is not the problem, replace the RAU.
Troubleshooting 7. 8. The Expansion Hub is not properly receiving the synchronization signal from the Main Hub. Too much loss on downlink MMF. Might be due to MMF pairs not attached to the proper connector. a. Check that the “down” cable end is in the DOWN port connector on both the Main Hub and on the Expansion Hub. Same for the “up” cable end and connectors for the UP port. b. If the problem persists, check the integrity of the MMF cable using an Optical Time Domain Reflectometer.
Maintenance, Troubleshooting, and Technical Assistance Use the following blank table to record LEDs as you troubleshoot. Remote Alarm Contacts Visual Alarm LEDs Main Hub Port Link Status 10-8 Expansion Hub Functionality Sync Sync Power Port Link Status RAU DB-9 Connector Functionality Sync Sync Power Power Sync LGCell 4.0 Installation, Operation, and Reference Manual Major Alarm Contact Error Latch Contact PN 8100-40 620004-0 Rev.
Technical Assistance 10.3 Technical Assistance Call our help hot line for technical assistance: 1-800-530-9960 (U.S. only) +1-408-952-2400 (International) +44(0) 1223 597812 (Europe) Leave your name and phone number and an LGC Wireless customer service representative will return your call within an hour.
Maintenance, Troubleshooting, and Technical Assistance 10-10 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40 620004-0 Rev.
APPENDIX A Cables and Connectors This section provides information about cables, connectors, and accessories that an LGCell application might require. • Appendix A.1 Coaxial Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 • Appendix A.2 Multimode Fiber Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 • Appendix A.3 Category 5 UTP/STP Cable . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cables and Connectors A.1 Coaxial Cable For Duplex RF Connections • Connects a Main Hub to a repeater or duplex base station • Provides bidirectional downlink and uplink transmission with one cable for duplex RF connections For Simplex RF Connections • Connects a Main Hub to a repeater or simplex base station • Provides unidirectional downlink and uplink signals on separate cables for simplex RF connections A.
Category 5 UTP/STP Cable A.
Cables and Connectors A-4 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40 620004-0 Rev.
APPENDIX B TIA/EIA 568-A Cabling Standard Following is a summary of the TIA/EIA 568-A commercial building telecommunications cabling standard. The TIA/EIA 568-A commercial building cabling standard addresses the need for a common criterion covering cabling in commercial buildings. The standard was drafted to ensure support for a wide variety of applications, devices, and vendor products.
TIA/EIA 568-A Cabling Standard B.1 Horizontal Wiring The horizontal cable is the portion of the cabling system which extends from the work area outlet to the telecommunications closet. The horizontal cabling is a star topology, with a maximum cabling run of 90 meters (295 feet), independent of media type. Voice 4-pair 100 ohm UTP cable Data 4-pair 100 ohm UTP/STP 2-pair 150 ohm STP 62.5µm/125µm fiber optic cable The horizontal cable amounts to the greatest quantity of individual cables in the building.
Backbone Wiring B.2 Backbone Wiring The backbone cabling provides the interconnection between the telecommunications closets and the equipment rooms and entrance facilities. The backbone cabling is also a star topology with the maximum cable length being media and application-dependent. The backbone cable typically is second to horizontal cables in terms of the amount of cable deployed. The cable selected should accommodate a minimum of one to several network planning periods.
TIA/EIA 568-A Cabling Standard B.3 Work Area The work area interconnects the horizontal cabling at the wall outlet to the desktop devices. The maximum allowable distance for patch cables is 3 meters (9.8 feet), based on the cable being of the same type as the horizontal cable. B.4 Telecommunications Closet The telecommunications closet is the area in a building dedicated to telecommunication equipment.
DC Power B.8 DC Power • DC power is supplied from the Expansion Hub to the RAUs via the Cat-5 twisted pair cable. Power is supplied on one pair (1,2) of the cable. • The maximum voltage on the cable is 12V, which conforms with UL requirement of a maximum voltage of 60Vdc. • Clause 14.3.1.1 of IEEE 802.3 requires Ethernet equipment to have an isolation of 2250Vdc. This means that accidentally plugging a Cat-5 twisted pair cable from an Expansion Hub into an 803.
TIA/EIA 568-A Cabling Standard B-6 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40 620004-0 Rev.
Compliance Information APPENDIX C All LGCell systems comply with Optical Fiber Safety Standard IEC/EN60825-2. The LGCell distributed antenna system uses light emitting diodes (LEDs) and is rated as a Class 1 optical hazard system. It has an absolute maximum output power of –11.5 dBm at 1310 nanometers (nm). There are no restrictions on the location or use of an LGCell system. No special precautions are required if standard work practices are followed.
Compliance Information C.1.2 800 MHz iDEN Telecom: FCC ID: NOO-DAS8M-4IDEN-W C.1.3 EMC: FCC Class A, Part 15, Subpart B Safety: UL 1950 3rd edition and the cUL mark for Canada NEBS: This is a customer driven conformance certification and typically desired of equipment that is intended to be installed in a Central Office environment.
LGCell System Approval Status C.1.5 1900 MHz TDMA, CDMA, and GSM Telecom: FCC: NOO-DAS19-4-X (FCC Part 24E) Distributed Antenna System (Repeater) Canada: 3077331163A for the “PCS 1900” (RSS-133, Issue 1) EMC: FCC: Class A, Part 15, Subpart B Industry Canada: Same as FCC Safety: UL 1950, 3rd Edition and the cUL mark for the Canadian equivalent. NEBS: This is a customer driven conformance certification and typically desired of equipment that is intended to be installed in a Central Office environment.
Compliance Information C.2 Declaration of Conformity to Type DECLARATION OF CONFORMITY We, LGC Wireless, of 2540 Junction Ave., San Jose, California, 95134-1902, declare under our sole responsibility that the product: LGCell, EGSM/GSM 900 Repeater, Model DAS9M-4E-W, to which this declaration relates, is in conformity with the following standards and/or other normative documents.
Declaration of Conformity to Type PN 8100-40 620004-0 Rev. B LGCell 4.
Compliance Information DECLARATION OF CONFORMITY We, LGC Wireless, of 2540 Junction Ave., San Jose, California, 95134-1902, declare under our sole responsibility that the product: LGCell, DCS 1800 Repeater, Model DAS18M-2, to which this declaration relates, is in conformity with the following standards and/or other normative documents.
IEC/EN 60825-2: Safe Use of Optical Fiber Communication Systems C.3 IEC/EN 60825-2: Safe Use of Optical Fiber Communication Systems Part 2 of IEC 60825 provides requirements and specific guidance for the safe use of optical fiber communications where optical power may be accessible at some distance from the optical source. In this part of IEC 825, light emitting diodes (LEDs) are included whenever the word “laser” is used. C.3.1 Description of LGCell System The LGCell is a distributed antenna system.
Compliance Information have received adequate training in laser safety and servicing of the system involved. Examples include optical cable ducts and switching centers. • 3.14 Location with Restricted Access: A location where access to the protective housing is restricted and not open to the public. Examples include industrial and commercial premises, PBX rooms, computer system rooms, and optical test sets.
IEC/EN 60825-2: Safe Use of Optical Fiber Communication Systems according to IEC 825-1. However, the power output level of the LGCell system is so low that it always falls into the class 1 hazard level even under 100% modulation conditions. The absolute maximum allowed at 1300nm is +9.5 dBm. The absolute maximum accessible output of the LGCell fiber optic system is –11.5 dBm. Therefore there is no restriction as to location of use of the LGCell system and there is no labeling requirement. C.3.
Compliance Information C.4 Human Exposure to RF The U.S. Federal Communications Commission (FCC) has adopted limits of human exposure to radio frequency (RF) emissions from portable or fixed RF systems that are regulated by the FCC. The exposure limits on the incident electric and magnetic fields and power densities are based on ANSI/IEEE and NCRP RF Safety Guidelines.
APPENDIX D Frequently Asked Questions • What is the LGCell Distributed Antenna System? The LGCell Distributed Antenna System (DAS) contains multiple low-power radiating elements that are deployed around indoor facilities to improve coverage and capacity. The unique, patented architecture of the LGCell DAS provides an inexpensive solution to the wireless operator or wirless network manager for coverage/capacity upgrades and private microcell applications.
Frequently Asked Questions • Can the LGCell support multiband operation? The LGCell provides a wide variety of single-band products, including the U.S. 800 MHz, European GSM 900, DCS 1800, Korean PCS 1800, U.S. PCS 1900 systems, and iDEN. You can use these systems together to provide multiband services. In addition, LGC has dual band 800/1900, 900/1800, and 1800/1800 LGCell systems available. Additionally, an LGCell neutral host configuration can simultaneously support multiple bands and protocols.
• Can the LGCell use 50µm/125µm multimode optical fiber? The LGCell is designed for use with 62.5µm/125µm fiber. Use of 50µm/125µm fiber results in higher optical losses and degraded performance. • How much space does the Main Hub and Expansion Hub use in a 19 in. rack? Both units use 1U of rack space. • Can I connect the LGCell alarms to a base station? Yes. Use the major alarm contacts only. The base station supplies the return ground and voltage. PN 8100-40 620004-0 Rev. B LGCell 4.
Frequently Asked Questions D-4 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40 620004-0 Rev.
APPENDIX E Glossary Air Interface A method for formatting data and voice onto radio waves. Common air interfaces include AMPS, TDMA, CDMA, and GSM. AIN Advanced Intelligent Network. AINs allow a wireless user to make and receive phone calls while roaming outside the user’s “home” network. These networks, which rely on computers and sophisticated switching techniques, also provide many Personal Communications Service (PCS) features.
Glossary BTA Basic Trading Area. The U.S. and its territories are divided into 493 areas, called BTAs. These BTAs are composed of a specific list of counties, based on a system originally developed by Rand McNally. The FCC grants licenses to wireless operators to provide service within these BTAs and/or MTAs. (See MTA.) BTS Base Transceiver Station. A GSM term referring to the group of network devices that provide radio transmission and reception, including antennas. C/I Carrier to interference ratio.
CTIA Cellular Telecommunications Industry Association. The CTIA is an industry association made up of most of the wireless carriers and other industry players. It was formed in 1984 to promote the cellular industry and cellular technology. D-AMPS Digital Advanced Mobile Phone Service. See IS-54. dB Decibel. A unit for expressing the ratio of two amounts of power. It is often used in wireless to describe the amount of power loss in a system (i.e., the ratio of transmitted power to received power).
Glossary Forward Channel Refers to the radio channel that sends information from the base station to the mobile station. (See Reverse Channel.) Frequency The number of times an electrical signal repeats an identical cycle in a unit of time, normally one second. One Hertz (Hz) is one cycle per second. Frequency re-use The ability to use the same frequencies repeatedly across a cellular system.
IS-136 Interim Standard-136. A U.S. TDMA cellular standard based on IS-54 that operates in the 800 MHz or 1900 MHz band. IS-553 Interim Standard-533. The U.S. analog cellular (AMPS) air interface standard. ITU International Telecommunications Union. The ITU is the principal international standards organization. It is charted by the United Nations and it establishes international regulations governing global telecommunications networks and services. Its headquarters are in Geneva, Switzerland.
Glossary PCMCIA Personal Computer Memory Card International Association. This acronym is used to refer to credit card sized packages containing memory, I/O devices and other capabilities for use in Personal Computers, handheld computers and other devices. PCS Personal Communications Service. A vague label applied to new-generation mobile communication technology that uses the narrow band and broadband spectrum recently allocated in the 1.9 GHz band. PDA Personal Digital Assistant.
Spectrum The range of electromagnetic frequencies. Spread Spectrum A method of transmitting a signal over a broad range of frequencies and then re-assembling the transmission at the far end. This technique reduces interference and increases the number of simultaneous conversations within a given radio frequency band. T-1 A North American commercial digital transmission standard. A T-1 connection uses time division multiplexing to carry 24 digital voice or data channels over copper wire.
Glossary E-8 LGCell 4.0 Installation and Reference Manual PN 8100-40 620004-0 Rev.
