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Zte ZXSDR BS8802 C100, Руководство пользователя

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Zte ZXSDR BS8802 C100 Скачать руководство пользователя страница 52

ZXSDR BS8802 C100 User Guide

Figure 6-14 Ceiling Installation

Steps

1.

Confirm the installation position and put the auxiliary installing part onto the ceiling.

Mark the positions of the installation holes on the ceiling according to the size of the

auxiliary installing part , as shown in

Figure 6-15

.

Figure 6-15 Marking Installation Hole Positions of the Auxiliary Installing Part

2.

Remove the auxiliary installing part and use a percussive drill to drill three Φ6X40mm

holes. Then install the expansion bolts delivered with the ZXSDR BS8802 C100 into

the holes.

6-16

SJ-20110329145303-001|2011–10–25 (R1.1)

ZTE Proprietary and Confidential

Содержание ZXSDR BS8802 C100

Страница 1: ...SDR CDMA Basestation 8802 User Guide Version 1 00 ZTE CORPORATION NO 55 Hi tech Road South ShenZhen P R China Postcode 518057 Tel 86 755 26771900 Fax 86 755 26770801 URL http ensupport zte com cn E mail support zte com cn ...

Страница 2: ...nfringement ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subject matter of this document Except as expressly provided in any written license between ZTE CORPORATION and its licensee the ...

Страница 3: ...stem Architecture 2 1 2 2 PRA Structure 2 2 2 3 Signal Processing Flow 2 3 Chapter 3 Indices 3 1 3 1 Physical Indices 3 1 3 2 Capacity Indices 3 1 3 3 Reliability Indices 3 1 3 4 Power Indices 3 2 3 5 Temperature and Humidity 3 2 3 6 Environmental Classes 3 2 3 7 RF Indices 3 2 3 8 BTS Clock Technical Parameters 3 6 Chapter 4 Networking 4 1 4 1 Overview 4 1 4 2 Existing Transmission Resource 4 1 4...

Страница 4: ... 1 6 1 3 Safety Specifications 6 3 6 2 Installation Preparation 6 6 6 3 Chassis Installation 6 6 6 3 1 Pole Mounting a ZXSDR BS8802 C100 6 6 6 3 2 Wall Mounted Installation 6 10 6 3 3 Ceiling Mounting the ZXSDR BS8802 C100 6 15 6 4 Cable Installation 6 19 6 5 GPS Antenna Feeder System Installation 6 19 6 5 1 GPS Antenna Installation 6 19 6 5 2 GPS Feeder Cable Selection Principle 6 25 Figures I Ta...

Страница 5: ... the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Caution Changes or modifications to this unit not expressly approved by the party responsible for compliance will void the user s authority to o...

Страница 6: ...II ...

Страница 7: ...addition the equipment complies with the following Standards and Guidelines with regard to RF energy and electromagnetic energy levels and evaluation of such levels for exposure to humans 1 FCC OET Bulletin 65 Edition 97 01 Supplement C Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields 2 American National Standards Institute C95 1 1992 IEEE Stan...

Страница 8: ...II ...

Страница 9: ...e following chapters Section Summary Chapter 1 System Description Gives an overview function and interfaces of ZXSDR BS8802 C100 Chapter 2 System Structure Describes the system structure of ZXSDR BS8802 C100 including hardware structure and software structure Chapter 3 Indices Describes the indices of ZXSDR BS8802 C100 Chapter 4 Networking Describes the networking mode of ZXSDR BS8802 C100 Chapter...

Страница 10: ... names window names CAPS Keys on the keyboard and buttons on screens and company name Note Provides additional information about a certain topic Checkpoint Indicates that a particular step needs to be checked before proceeding further Tip Indicates a suggestion or hint to make things easier or more productive for the reader II ...

Страница 11: ...ion and other blind fields and solution and optimization scheme for building coverage Under this background ZTE launches the ZXSDR BS8802 C100 Pico Cell BTS and network solution ZXSDR BS8802 C100 is an indoor multi carrier Pico Base Transceiver Station with low cost and low power It is based on ALL IP architecture which facilitates the construction of flexible cross area network modes and virtual ...

Страница 12: ...SDR BS8802 C100 communicates with BSC through the Abis interface The Abis interface is an interior interface of the system supporting IP Over Ethernet interface l Um interface Um interface is the interface connecting the access terminal AT and ZXSDR BS8802 C100 following IS 2000 ReleaseA series standards and IS 856 A standard 1 3 Appearance Figure 1 2 shows ZXSDR BS8802 C100 appearance 1 2 SJ 2011...

Страница 13: ...o resources allocation call processing power control and soft handoff it is characterized by auto IP capturing public network traversing simple transmission back path several clock synchronization and easy installation etc ZXSDR BS8802 C100 is based on all IP platform design A single site can support three carriers and one pseudo pilot maximally including one 1x carrier two DO carriers and one 1x ...

Страница 14: ...ion for received RF signal Basic RF Function Amplification for transmitted RF signal Abis interface supports IP Over Ethernet access Air interface supports IS 2000 Release A and IS 856 A standards Antenna interface supports RF transmission and reception Power interface DC 12 V 13 V LMT interface supports local maintenance GPS interface supports GPS RGPS interface supports RGPS USB interface reserv...

Страница 15: ...pecially the coverage problems cannot solved by traditional base stations ZXSDR BS8802 C100 solution is forward looking and has fully considered the actual requirements of operators It has the following characteristics l Small size light weight It is 2 7 L in size and less than 2 kg in weight One person can easily transport carry and install it It can save the transportation and labor cost and ach...

Страница 16: ...smission l Large capacity It supports 1x and DO services simultaneously and can evolve to EV DO Rev B through software upgrade l Environment protection It has small transmission power and low power consumption thus saving the electricity fee It satisfies the RoSH requirements l Easy maintenance and operation It supports remote or local maintenance The maintenance personnel can upgrade the software...

Страница 17: ... Rate Packet Data HRPD Radio Access Network Interfaces l 3GPP2 C S0024 B TIA EIA IS 856 B cdma2000 High Rate Packet Data Air Interface Specification l 3GPP2 C S0024 TIA EIA IS 856 CDMA2000 High Rate Packet Data Air Interface Specification October 2002 l 3GPP2 C S0024 A TIA EIA IS 856 A CDMA2000 High Rate Packet Data Air Interface Specification August 2005 l CDG RF36 Markov Service Option for Wideb...

Страница 18: ...5 0 Introduction to CDMA2000 Standards for Spread Spectrum Systems Release A l TIA EIA TSB 74 Support for 14 4 Kbps Data Rate and PCS Interaction for Wideband Spread Spectrum Cellular System 1995 l TIA EIA IS 728 Inter System Link Protocol l 3GPP2 C S0005 A version 6 0 TIA EIA IS 2000 5 A 2 Upper Layer Layer 3 Signaling Standard for CDMA2000 Spread Spectrum Systems Release A Addendum 2 l TIA EIA I...

Страница 19: ...and small size The product is forward looking and competitive The system diagram is shown as Figure 2 1 Figure 2 1 ZXSDR BS8802 C100 System Structure ZXSDR BS8802 C100 consists of PRA AC DC power adapter and external transmitting and receiving antenna l Integration unit PRA PRA is the unit with integrated functions such as control clock access baseband and radio frequency It is the core unit of ZX...

Страница 20: ...ncy unit baseband unit control unit clock unit and power unit Figure 2 2 shows the PRA structure of ZXSDR BS8802 C100 Figure 2 2 PRA Structure Table 2 1 describes the functions of PRA modules Table 2 1 ZXSDR BS8802 C100 Modules and Their Functions Name Function Radio frequency l Provides RF signal modulation and demodulation l Provides transmission RF signal amplification 2 2 SJ 20110329145303 001...

Страница 21: ... internal signal processing flow of ZXSDR BS8802 C100 is as below l Forward link processing The business data from BSC enters the baseband unit through the control unit and then for CDMA modulation and intermediate frequency processing After the power amplification of TX unit RF link it is sent to the antenna for transmission l Reverse link processing The reverse CDMA signals from the antenna are ...

Страница 22: ...ZXSDR BS8802 C100 User Guide This page intentionally left blank 2 4 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 23: ...indices is shown as Table 3 1 Table 3 1 ZXSDR BS8802 C100 Capacity Indices Item Carriers supported Application 1 1C 1X 2C DO 1 Pseudo Pilot Supporting 1x DOrA DOrB applications 2 1C 1X 1C DO 2 Pseudo Pilots Supporting 1x DOrA DOrB applications 3 2C DO Only applicable to data service not supporting hard ware upgrade 4 1C 1X 1 Pseudo Pilot Only applicable to voice service not supporting hardware upg...

Страница 24: ...PP2 C S0010 C Recommended Minimum Performance Standards for cdma2000 Spread Spectrum Base Station and 3GPP2 C S0032 A Recommended Minimum Performance Standards for CDMA2000 High Rate Packet Data Access Network Table 3 2 illustrates the 800 MHz transmitter indices Table 3 2 800 MHz Transmitter Indices Name Index Operating band 800 MHz Band Class 0 Transmitter output frequency tolerance 0 01 ppm Occ...

Страница 25: ...ance falls within 3 us and the inter carrier tolerance falls within 1 us Time difference 50 ns Time Tolerance phase tolerance of pilot channel to other channels Phase difference 0 05 rad Waveform quality Rho is greater than 0 970 dBm with configuration of a single pilot Pilot code domain power With the standard 9CH configuration the pilot code domain power is in the range of 7 0 0 5 dB Inactive ch...

Страница 26: ...M 19 2M OFFSET 30dBm RBW 300kHz 1GHz f 12 5GHz 19 2MHz OFFSET 30dBm RBW 1MHz 1GHz f 12 5GHz Transmitter intermodulation performance If one BTS transmits at the rated power but another BTS output power is 30 dB less than the former s rated power When the powers of two BTSs are combined on the antenna port the generated intermodulation spurious emission meets the conducted spurious emission requirem...

Страница 27: ...N0 10 dB 1dB the Frame Error Rate FER is lower than 1 Noise figure 3 Single tone desensitization In the presence of a single tone that is 50 dB above the CDMA signal level and is at offset of 750 kHz from the center frequency the output power of the MS increases by no more than 3 dB and the FER is less than 1 5 In the presence of a single tone that is 75 dB above the CDMA signal level and is at of...

Страница 28: ...tion In the presence of two interfering tones that are 60 dB above the CDMA signal level and are at offsets of 1 25 MHz and 2 05 MHz and 1 25 MHz and 2 05 MHz from the center frequency the output power of the MS increases by no more than 3 dB and the FER is less than 1 5 Conducted spurious emissions and radiated spurious emissions 80 dBm measured within the BTS receive band 60 dBm measured within ...

Страница 29: ...Chapter 3 Indices l Clock system performance Frequency difference 0 05 ppm Phase difference 10 us 3 7 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 30: ...ZXSDR BS8802 C100 User Guide This page intentionally left blank 3 8 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 31: ...Transmission Resource If there are idle transmission timeslots between target coverage area and BSC the networking mode shown in Figure 4 1 can be used to make full use of existing transmission resources In actual practice as E1 transmission link always exists between coverage site and BSC use a pair of G 703 V 35 protocol converter to convert IP signals and E1 signals Figure 4 1 Existing Transmis...

Страница 32: ... data transmissions through operator s own data network Disadvantage Few operators have their own data network 4 4 Public Network Resource As the signals are IP based ZXSDR BS8802 C100 can make full use of public network resources such as the Internet to transmit signals The networking mode is as shown in Figure 4 3 Figure 4 3 Public Network Resource Advantage Flexible and convenient and rich netw...

Страница 33: ...orts broadband user experience thus becoming the preferred equipment for cost effective indoor coverage Figure 5 1 shows the indoor coverage networking solution Figure 5 1 Indoor Coverage In different indoor scenarios ZXSDR BS8802 C100 has different applications The following part describes some typical application solutions 5 2 Family Coverage ZXSDR BS8802 C100 is small sized light and easy to in...

Страница 34: ... all employees in motion can perform communication based on various services in real time This facilitates the cooperation and frequent communication of employees in different districts of an enterprise with large span With this solution various customized service can be realized inside an enterprise such as integrated digital office platform Figure 5 3 shows the solution Figure 5 3 Enterprise Sol...

Страница 35: ... emergency vehicle and in areas with insufficient network resources ZXSDR BS8802 C100 can assist an emergency vehicle to realize a perfect coverage In addition as ZXSDR BS8802 C100 is flexible and convenient to handle it can also provide perfect solution in blind areas which are difficult to be covered by common solution for example elevator underground parking lot and metro platform Figure 5 4 sh...

Страница 36: ...ZXSDR BS8802 C100 User Guide This page intentionally left blank 5 4 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 37: ...ve received training on installing ZTE equipment Observe related equipment precautions and special safety instructions during maintenance provided by ZTE Some important safety instructions are discussed in this chapter ZTE shall not bear any liabilities incurred by violation of universal safety operation requirements or violation of safety standards for designing manufacturing and equipment usage ...

Страница 38: ...ng caution and note The formats and meanings of the four levels are described as below Danger Indicates an imminently hazardous situation which if not avoided could result in death or serious injury Limit its use to only extreme situations Warning Indicates a hazardous situation which if not avoided could result in serious injuries equipment damages or interruption of major services Caution Indica...

Страница 39: ...hat the cable and its label meet the actual installation requirements Warning It is not allowed to drill cabinet holes without permission Unqualified drilling could damage wiring inside the cabinet Additionally the metal pieces inside the cabinet created by drilling could result in a shorted circuit board Antistatic Caution Static electricity produced by human body can damage static sensitive comp...

Страница 40: ...ptical transceiver or inside the optical fiber to avoid eye damage High Temperature Danger Avoid touching the surface area of some devices due to high temperature to avoid a scald injury Fans Warning Do not put fingers or any tools in the running fan to avoid an injury Keep tools away from the running fan Sticking finger inside a running fan may cause hurt Put parts screws and tools away from the ...

Страница 41: ... front board rear board and fan module Caution l Avoid inserting a module forcibly Otherwise the pin on the backplane may bent l Align the module with the guide rail and push it gently to the backplane Plug the module properly into the slot to prevent short circuit due to contact between the module and the circuit surface l Avoid touching the circuits components connectors and cable troughs when h...

Страница 42: ...e humidity 5 95 Power requirement Local power supply 85 V AC to 264 V AC Facility requirement Vertical wall level ceiling vertical pole 6 3 Chassis Installation ZXSDR BS8802 C100 is compact in structure and occupies small footprint Therefore it can be flexibly installed in various indoor places In actual application the most commonly used installation modes are wall mounted installation pole insta...

Страница 43: ...n in Figure 6 1 Figure 6 1 Fixing the Power Adapter Bracket onto the Pole 1 Bar clasp 2 Power adapter bracket 2 Make sure that the UP on the installing bracket faces upward Insert the installing bracket into the power adapter bracket 3 Fix the installing bracket onto the power adapter bracket with screws as shown inFigure 6 2 6 7 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidenti...

Страница 44: ...ket 1 Fixing screws 2 Installing bracket 3 Power adapter bracket 4 Embed the four hooks at the back of the ZXSDR BS8802 C100 into the four slots of the installing bracket as shown in Figure 6 3 6 8 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 45: ... C100 5 Use two screws to fix the ZXSDR BS8802 C100 as shown in Figure 6 4 Figure 6 4 Fixing the ZXSDR BS8802 C100 End of Steps Result Figure 6 5 shows the ZXSDR BS8802 C100 installed on a pole 6 9 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 46: ...unting an Overlapped ZXSDR BS8802 C100 and Power Adapter Context If no sufficient room is available the power adapter bracket and the installing bracket can overlap to save room as shown in Figure 6 6 Figure 6 6 Overlapped Fixing Brackets 6 10 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 47: ...n the wall with fixing screws according to the positions of the installation holes 4 Make sure that the UP on the installing bracket faces upward and insert the installing bracket into the power adapter bracket and use two screws to fix the installing bracket as shown in Figure 6 7 Figure 6 7 Inserting the Installing Bracket 1 Fixing screws 2 Installing bracket 3 Power adapter bracket 5 Insert the...

Страница 48: ...ixing the ZXSDR BS8802 C100 End of Steps 6 3 2 2 Separately Wall Mounting the ZXSDR BS8802 C100 and Power Adapter Context If sufficient room is available install the power adapter bracket and the installing bracket separately for better heat dissipation as shown in Figure 6 10 6 12 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 49: ...om the power adapter bracket at the same horizon of the wall and mark the installation positions according to the size of the installing bracket as shown inFigure 6 11 Figure 6 11 Deciding the Installation Positions of the Installing Bracket 3 Use a percussive drill to drill Φ6X40mm holes according to the marked installation positions and insert the expansion bolts delivered with the ZXSDR BS8802 ...

Страница 50: ...with fixing screws according to its installation positions 6 Embed the four hooks at the back of the ZXSDR BS8802 C100 into the four slots of the installing bracket as shown in Figure 6 12 Figure 6 12 Hanging the ZXSDR BS8802 C100 7 Use two screws to fix the ZXSDR BS8802 C100 as shown inFigure 6 13 6 14 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 51: ...End of Steps 6 3 3 Ceiling Mounting the ZXSDR BS8802 C100 Context In view of the endurable weight the cement ceiling is chosen for ceiling installation Figure 6 14 shows the ceiling installation mode 6 15 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 52: ...ng according to the size of the auxiliary installing part as shown in Figure 6 15 Figure 6 15 Marking Installation Hole Positions of the Auxiliary Installing Part 2 Remove the auxiliary installing part and use a percussive drill to drill three Φ6X40mm holes Then install the expansion bolts delivered with the ZXSDR BS8802 C100 into the holes 6 16 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietar...

Страница 53: ...g screws 4 Fix the ceiling mounted bracket onto the auxiliary installing part with three screws as shown in Figure 6 16 Figure 6 16 Ceil Mounting the Bracket 5 Use four screws to fix the power adapter bracket at the back of the ZXSDR BS8802 C100 as shown inFigure 6 17 6 17 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 54: ...ter Bracket 6 Embed the four hooks at the back of the ZXSDR BS8802 C100 into the four slots of the ceil mounted bracket 7 Fix the ZXSDR BS8802 C100 with two screws as shown in Figure 6 18 6 18 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 55: ... The cables to be connected are as follows l Ethernet cable l Power cable l GPS cable 6 5 GPS Antenna Feeder System Installation 6 5 1 GPS Antenna Installation 6 5 1 1 Installing a GPS Antenna in Vertical Placement Prerequisites The following tools must be ready l Adjustable spanner l Normal Spanner 6 19 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 56: ...o the mounting pole Insert a spring washer and washer between the U shaped clamp and mounting pole 3 Use a M6 nut to fix the U shaped clamp and the pole together firmly Figure 6 19 shows the fixing process Figure 6 19 U shaped Clamp Installation 1 GPS settled clamp 2 Cable strip 3 Mounting pole 4 U shaped clamp 4 Fix the GPS antenna to the GPS settled clamp Screw the bolt M4x14 to firmly fix the a...

Страница 57: ... 60 mm 48 mm is optimal l The pole used to fix the GPS antenna must be grounded well l The antenna cannot be installed during rain and heavy wind Steps 1 Open the package and take out the GPS antenna and GPS rack 2 Use the U shape clamp to install the GPS rack to the mounting pole 3 The installation support of GPS antenna is as shown in Figure 6 21 Align holes on the U shape clamp with Hole 1 and ...

Страница 58: ...gure 6 22 GPS Rack Installation Horizontal Placement 4 Fix the GPS antenna to the GPS settled clamp Screw down the bolt M4x14 to firmly fix the antenna End of Steps Result Figure 6 23 shows the GPS antenna fixed horizontally 6 22 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 59: ... spanner l Hammer l Expansion anchor bolts M5x30 or M5x40 Context For installing the GPS Antenna on the wall the U shape clamp is unnecessary Steps 1 Open the package and take out the GPS antenna and GPS rack 2 Use the design template for marking holes on the wall Then drill holes on the wall according to the size of the expansion anchor bolts that are to be used Figure 6 24 shows the design templ...

Страница 60: ...sition 5 Insert a spring washer and flat washer onto expansion bolts and use the M6 nut to fix the rack on the wall firmly Note The torque used to fix the clamp is 45 Nm 6 Fix the GPS antenna to the GPS settled clamp and screw the M4x14 bolt tightly End of Steps Result Figure 6 25 shows the GPS antenna fixed on the wall 6 24 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 61: ...If the feeder length 80 m then select an 1 4 feeder cable 2 If 80 m the feeder length 150 m then select an 1 2 feeder cable 3 If 150 m the feeder length 300 m then select an 1 2 feeder cable 7 8 feeder cable 1 2 feeder cable 4 If the feeder length is more than 300 m contact the local representative office of ZTE Corporation 6 25 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidentia...

Страница 62: ...ZXSDR BS8802 C100 User Guide This page intentionally left blank 6 26 SJ 20110329145303 001 2011 10 25 R1 1 ZTE Proprietary and Confidential ...

Страница 63: ...ging the ZXSDR BS8802 C100 6 9 Figure 6 4 Fixing the ZXSDR BS8802 C100 6 9 Figure 6 5 Pole Mounted Installation 6 10 Figure 6 6 Overlapped Fixing Brackets 6 10 Figure 6 7 Inserting the Installing Bracket 6 11 Figure 6 8 Hanging the ZXSDR BS8802 C100 6 12 Figure 6 9 Fixing the ZXSDR BS8802 C100 6 12 Figure 6 10 Separately Wall Mounted ZXSDR BS8802 C100 and Power Adapter 6 13 Figure 6 11 Deciding th...

Страница 64: ...ntenna Vertical Installation 6 21 Figure 6 21 GPS Antenna Rack Installation Support 6 22 Figure 6 22 GPS Rack Installation Horizontal Placement 6 22 Figure 6 23 GPS Antenna Fixed Horizontally 6 23 Figure 6 24 Design Template for Marking Holes 6 24 Figure 6 25 GPS Antenna Fixed on Wall 6 25 II ...

Страница 65: ... BS8802 C100 Modules and Their Functions 2 2 Table 3 1 ZXSDR BS8802 C100 Capacity Indices 3 1 Table 3 2 800 MHz Transmitter Indices 3 2 Table 3 3 1 9 GHz Transmitter Indices 3 4 Table 3 4 800 MHz Receiver Indices 3 5 Table 3 5 1 9 GHz Receiver Indices 3 6 Table 6 1 Safety Symbols Description 6 1 III ...

Страница 66: ...Tables This page intentionally left blank ...

Страница 67: ...Glossary BSC Base Station Controller BSS Base Station System BTS Base Transceiver Station CDMA Code Division Multiple Access GPS Global Positioning System MSS Mobile Switching System V ...

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