ZTE R8882S1700 UMTS and LTE Remote Radio Unit User Manual ZXSDR R8882 Product Description

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ZXSDR R8882 Product Description
UniRAN15/GUL Multi-Mode
ZXSDR R8882 Product Description
ZXSDR R8882 Product Description
Version
Date
V1.00
2015-02-12
V1.10
2015-04-15
Author
Reviewer
Notes
Yang Lisha,
Chen Yong, Yang
First release, information of GSM, UMTS and
Guo Qing
Xu, Li Sijun
FDD LTE Multi-Mode are included
Yang Lisha,
Chen Yong, Yang
Modified the cover and the header logo,
Guo Qing
Xu, Li Sijun
introduce U/L dual-mode in 1700 spectrum
© 2015 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used
without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is subjected to
change without notice.
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ZXSDR R8882 Product Description
TABLE OF CONTENTS
1.1
1.2
1.3
Overview ............................................................................................................ 4
Introduction .......................................................................................................... 4
Benefits................................................................................................................ 4
Application Scenarios .......................................................................................... 5
2.1
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.3
2.4
2.5
Product Architecture ......................................................................................... 5
Physical Structure ................................................................................................ 5
Hardware Structure .............................................................................................. 6
QTR/DTR ............................................................................................................. 7
DFL ...................................................................................................................... 8
PA ........................................................................................................................ 9
RPDC .................................................................................................................. 9
PIB ..................................................................................................................... 10
External Interfaces ............................................................................................. 10
Software Architecture ......................................................................................... 11
Functionality....................................................................................................... 12
3.1
3.2
3.2.1
3.2.2
3.2.3
3.2.4
3.3
3.3.1
3.3.2
3.4
3.5
3.6
3.7
Technical Specifications ................................................................................. 13
Physical Indices ................................................................................................. 13
Performance Indices .......................................................................................... 14
Operation Frequency Band ................................................................................ 14
Capacity ............................................................................................................. 15
Static Receiving Sensitivity ................................................................................ 15
TOC Output Power ............................................................................................ 16
Power Indices .................................................................................................... 17
Power Supply..................................................................................................... 17
Power Consumption........................................................................................... 17
Transmission ..................................................................................................... 19
Working Environment ......................................................................................... 19
Electromagnetic Compatibility ............................................................................ 20
Reliability ........................................................................................................... 20
Installation ....................................................................................................... 20
Configurations ................................................................................................. 21
Abbreviation .................................................................................................... 22
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ZXSDR R8882 Product Description
FIGURES
Figure 2-1 R8882 (2*60W) Physical Appearance ................................................................ 6
Figure 2-2 R8882 (2*40W) Physical Appearance ................................................................ 6
Figure 2-3 R8882 System Structure .................................................................................... 7
Figure 2-4 R8882 External Interfaces ................................................................................10
Figure 2-5 ZXSDR R8882 Software Architecture ...............................................................12
TABLES
Table 2-1 R8882 External Interfaces Description ...............................................................10
Table 3-1 R8882 (2*60W) Physical Indices ........................................................................14
Table 3-2 R8882 (2*40W) Physical Indices ........................................................................14
Table 3-3 R8882 (2*60W) Frequency Spectrum ................................................................14
Table 3-4 R8882 (2*40W) Frequency Spectrum ................................................................14
Table 3-5 R8882 Capacity .................................................................................................15
Table 3-6 R8882 Static Receiver Sensitivity ......................................................................15
Table 3-7 R8882 TOC Output Power and Transmitting & Receiving Channels ..................16
Table 3-8 R8882 Power supply indices ..............................................................................17
Table 3-9 R8882 Power Consumption in UMTS Single Mode ............................................17
Table 3-10 R8882 Power Consumption in GSM Single Mode ............................................18
Table 3-11 R8882 Power Consumption in LTE Single Mode..............................................18
Table 3-12 R8882 Power Consumption in GSM/UMTS Dual-Mode ...................................18
Table 3-13 R8882 Power Consumption in GSM/LTE Dual-Mode .......................................18
Table 3-14 R8882 Power Consumption in UMTS/LTE Dual-Mode .....................................19
Table 3-15 R8882 CPRI Interfaces ....................................................................................19
Table 3-16 R8882 Environment Condition Compatibility ....................................................19
Table 3-17 R8882 Reliability Characteristics ......................................................................20
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ZXSDR R8882 Product Description
Overview
1.1
Introduction
ZXSDR R8882 (hereinafter R8882) is one distributed Remote Radio Unit (RRU) used in
ZTE Uni-RAN total solution, with two transmitters. Based on the new generation of ZTE
common RRU platform, R8882 can work in GSM, UMTS, LTE single mode or
Multi-Mode.
R8882 series includes R8882 2*60W, 2*40W, 2T2R and 2T4R. They have the same
architecture; only differ from each other in power amplifier and physical vision.
The document is designed to give an overview of the characteristics of R8882, its key
benefits, the architecture, functionality and services, as well as the system capabilities.
1.2
Benefits

Wide Working Bandwidth, Less Hardware Investment
To meet with the growing demands for wide working bandwidth, R8882 modules
with wide working bandwidth are released. Maximum working bandwidth of R8882
is 75MHz for 1800M band and 35MHz for 900M band. For frequency spectrums
become scarce, resources allocated for operators tend to be characterized with
fragmentation and large span. RRUs with wide working bandwidth integrate more
spectrum resources and help to decrease hardware investment. (This is the
maximum bandwidth of the RF modules. Please make the actual module as the
standard.)
In LTE mode, R8882 can deal with 4 separate 1.4M/3M/5MHz or 2 separate
10M/15/20MHz bandwidths carriers. It benefits the operators who do not possess a
continuous 20M bandwidth.

Clear and Simple Network
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ZXSDR R8882 Product Description
R8882 supports GSM, UMTS, LTE or mixed technologies. It supports Multi-Mode at
the same frequency band simultaneously. Instead of running hardware on
independent platforms for each technology, operators can implement various
wireless technologies through software configuration on the same hardware
platform. It fully satisfies operators’ requirements of hybrid network deployment and
long term evolution with low cost.

MIMO Capable, Better Performance
R8882 supports 2T4R in one box, which optimizes spectrum efficiency greatly and
improves network uplink performance. it brings better experience to customers.

High PA Efficiency, Low Power Consumption
R8882’s PA adopts advanced efficiency enhancement technologies to realize high
power efficiency, such as Doherty PA, DPD linear technology and MCPA
technology. Power consumption can be greatly decreased with these features.
1.3
Application Scenarios
R8882s and one base band unit (BBU) form a complete BTS/NodeB. It implements radio
transmission, controls radio channels and communicates with the Base Station
Controller (BSC/RNC). It supports indoor and outdoor applications.
Product Architecture
2.1
Physical Structure
R8882 is the multi-carrier RF module with two transmitters. Now ZTE provides R8882
series, including R8882 2*60W, 2*40W, 2T2R and 2T4R. R8882s with different output
power have the same architecture but differ in the power amplifier and physical indices.
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ZXSDR R8882 Product Description
The differences between 2T2R and 2T4R modules include working bandwidth and
number of receivers. In the physical appearance, R8882 2T4R has four antenna feeder
interfaces but R8882 2T2R has two. The physical appearance is shown as follows.
Figure 2-1
R8882 (2*60W) Physical Appearance
Figure 2-2
R8882 (2*40W) Physical Appearance
R8882 has two PAs, with both PAs working on the same bands, or one PA in 900MHz
and the other in 1800MHz. With SDR platform, R8882 supports GSM, UMTS or LTE
single mode or mixed-mode through software configuration.
2.2
Hardware Structure
R8882 includes the following main hardware modules:

Quad-channel Transceiver (QTR) or Dual-channel Transceiver (DTR)
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ZXSDR R8882 Product Description

Duplex Filters (DFL)

2 * Power Amplifier (PA)

RRU Power for DC (RPDC)

Lightning protection module(PIB)
The hardware structure of R8882 is shown below.
Figure 2-3
R8882 System Structure
AISG
PIB
QTR/DTR
2×PA
MON
CPRI 1
CPRI 2
LMT
R8882
PA Out
GND
RPDC
DFL
DC in
ANT1 ANT2* ANT3* ANT4
Optional*: For R8882 2T2R, ANT2 and ANT3 interfaces do not exist.
2.2.1
QTR/DTR
The QTR/DTR module has following functions:

QTR processes 4 received signals and 2 transmitted signals

DTR processes 2 received signals and 2 transmitted signals

Processes radio signal Up/Down conversion

Processes Downlink IQ signal multiplexing and uplink signal de-multiplexing

Processes signal amplifying, filtering, A/D conversion and D/A conversion
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ZXSDR R8882 Product Description

Converts between optical and electric signals

Captures reference clock signals from baseband unit and provide clock signals to
other units

Supports Voltage Standing Wave Ratio (VSWR) measurement and report;

Communicates with baseband unit and cascading RRU

Supports radio frequency hopping function

Supports adaptive modulation rate processing

Supports hardware failure self-detection and alarm

Supports over-heat detection and alarming

Provides communication interfaces, including,

2.2.2

Two CPRI interfaces

One RS485 serial port for external monitor equipment communication

One AISG for electrical tilt antenna, and

One Fast Ethernet port for LMT
Supports reset function
DFL
The DFL module includes 2 duplexers and 4 (or 2) receiving filters and has the following
functions:

Transmits and receives uplink and downlink signals in duplex mode

Suppresses spurious emission on the downlink to get acceptable out-band T
spurious emission required by the system and related protocol

Suppresses interference signals on the uplink to achieve a satisfied noise
coefficient
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ZXSDR R8882 Product Description
2.2.3
PA
There are 2 PAs and 4 (or 2) LNAs included and following functions are provided:

Amplifies downlink radio signals received from the TRM, and outputs the amplified
signals to the FLD

Amplifies four signals received from the FLD with the LNA, and then sends the
amplified signals to the TRM

Provides a pre-distortion feedback interface to the TRM

Provides an interface to the TRM for Voltage Standing Wave Ratio (VSWR)
detection (forward power detection)
2.2.4

Supports separate switch-off

Supports Inner-module temperature detection

Provides read and write interfaces for module inventory management
RPDC
The RPDC module has following functions:

Provides the built-in lightning protection for -48 V power supply

Provides -48 V power filter

Protects AISG signals (half-duplex 485 signal)

Protects the RS485 monitoring signals

Provides adaptation for external MON interface, AISG interface, and power
interface

Provides the hardware version identifiers of boards
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ZXSDR R8882 Product Description
2.2.5
PIB

2.3
Provides lightning protection for the AISG, RS485 and dry contacts
External Interfaces
R8882 external interfaces are located at the bottom and side, as shown in Figure 2-4.
Figure 2-4
R8882 External Interfaces
The interfaces are described in the following table.
Table 2-1
S.N.
10
R8882 External Interfaces Description
Label
PWR
MON
Interface
-48V DC power input
interface
External monitoring
interface
Interface Type/Connector
2-pin round plastic connector (male)
8-pin circle connector (male)
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ZXSDR R8882 Product Description
AISG
AISG interface
GND
PE interface
8-pin circle connector (IEC
60130-9-ED) (female)
16 mm2 yellow-green round terminal
BBU and RRU
OPT1
Interface/RRU
LC-mode optical interface (IEC 874)
cascading interface
OPT2
ANT1
(TX0/RX0)
RRU cascading
interface
LC-mode optical interface (IEC 874)
Antenna feeder
interface
50 Ω DIN-mode connector
(Tx0/Rx0)
ANT2
(RX2)
Antenna feeder
interface (Rx2)
50 Ω DIN-mode connector
(Optional*)
ANT3
(RX3)
Antenna feeder
interface (Rx3)
50 Ω DIN-mode connector
(Optional*)
10
ANT4
(TX1/RX1)
Antenna feeder
interface
50 Ω DIN-mode connector
(Tx1/Rx1)
Ethernet interface
11
LMT
for operation and
RJ45
maintenance
Optional*: For R8882 2T2R, ANT3 and ANT2 interfaces do not exist.
R8882 S8000 and S7200 has 2T2R only, and the other modules has
2.4
Software Architecture
The software architecture of R8882 can be divided into two layers: SDR Unified Platform
Software and Application Software. The architecture is shown in the following figure.
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ZXSDR R8882 Product Description
Figure 2-5
ZXSDR R8882 Software Architecture
Application
OAM
Software
OSS
SDR Unified
Platform
Linux
Software
BSP
Hardware
Hardware
System
The Operating and Maintenance (OAM) sub-system is the application layer. Its main
functions
include
software
downloading,
configuration,
management,
system
maintenance and measurement.
The Operation Support Sub-system (OSS) is the supporting layer in this entire
framework. It is a hardware independent layer that provides basic functions like
scheduling, timer, and memory management, communication, sequencing control,
monitoring, alarming and logging.
The Board Support Package (BSP) provides device driver & initialization and supports
basic functions like alarming and monitoring. It also provides related interfaces and
services to the Operating System.
2.5
Functionality
R8882 supports the following functionalities:

Supports DD/2600MHz by R8882 2*40W

Supports
APAC700M/810M/850M/900M/1700M/1800M/1900M/2100MHz
by
R8882 2*60W
12
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ZXSDR R8882 Product Description

Support the LTE scalable bandwidth configurations of 1.4MHz/3MHz/5MHz/10MHz/
15MHz/20MHz

Support 2T2R/2T4R in one box which can optimize spectrum efficiency greatly and
improve network uplink performance

supports two cells configuration with 2T4R module

Supports 2*2 MIMO configuration

Supports GSM only, UMTS only, LTE only or mixed mode

Support 64QAM modulation in both downlink and uplink for LTE

Supports RTWP report interval at 100ms and 2ms

Supports transmit power reporting function for every carrier

Supports overload protection function for power amplifier

Supports measurement, compensation and adjustment function for channel delay

Supports dynamic PA voltage adjustment to achieve best efficiency in different
system loads

Supports transmitting channel switching on/off function

Supports built-in lightning protection function for DC power supply

Supports no affect to the running of BBU and other R8882s that are connected to
the failure R8882
Technical Specifications
3.1
Physical Indices
R8882 employs the compact design, and the physical indices are listed below.
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ZXSDR R8882 Product Description
Table 3-1
R8882 (2*60W) Physical Indices
Item
Index
Dimension (H*W*D)
480*320*150 mm (23L)
Weight
23kg
Color
Silver gray
Table 3-2
R8882 (2*40W) Physical Indices
Item
Index
Dimension (H*W*D)
380*320*140 mm (17L)
Weight
20kg
Color
Silver gray
3.2
Performance Indices
3.2.1
Operation Frequency Band
Table 3-3
R8882 (2*60W) Frequency Spectrum
System
RRU Frequency Spectrum(MHz)
GSM single mode
850/900/1800/1900
UMTS single mode
850/900/1700/1900/2100
LTE single mode
APAC700/810/850/900/1700/1800/1900/2100
GU Dual-Mode
850/900/1900, or GU Dual-Mode in 900MHz of one PA,
and GSM single mode in 1800MHz of the other PA
GL Dual-Mode
900/1800
UL Dual-Mode
1700/2100
Table 3-4
R8882 (2*40W) Frequency Spectrum
System
LTE single mode
RRU Frequency Spectrum(MHz)
DD/2600
Note: The actual working bandwidth and IBW are subject to the products configured.
14
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ZXSDR R8882 Product Description
3.2.2
Capacity
Table 3-5
R8882 Capacity
System
GSM single mode
UMTS single mode(except
1700MHz)
UMTS single
mode(1700MHz)
LTE single mode
GU Dual-Mode
3.2.3
RRU Capacity
12 TRXs, or 6 TRXs@900MHz + 6 TRXs@1800MHz
8 carriers (non-MIMO), or 4 carriers (MIMO)
2 UMTS carriers (MIMO)
1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz
8 GSM TRXs + 2 UMTS carriers, or
4 GSM TRXs + 4 UMTS carriers
GL Dual-Mode 900MHz
8 GSM TRXs + LTE10MHz
GL Dual-Mode 1800MHz
8 GSM TRXs + LTE 20MHz
UL Dual-Mode
2 UMTS carriers (MIMO) + LTE 20MHz
Static Receiving Sensitivity
Table 3-6
R8882 Static Receiver Sensitivity
Mode
GSM
Frequency
Single Antenna
Dual Antennas
Four Antennas
Spectrum(MHz)
(dBm)
(dBm)
(dBm)
850/900/1800/
-113.5
-115.5
N/A
-126.5
-129.2
N/A
-126.4
-129.1
N/A
APAC700/DD
-106.6
-109.4
N/A
850/900
-106.6
-109.4
-112.2
-106.4
-109.2
-112
1900
2100
UMTS
850/900/1700/190
LTE
1700/1800/1900/2
100/2600
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ZXSDR R8882 Product Description
3.2.4
TOC Output Power
Table 3-7
R8882 TOC Output Power and Transmitting & Receiving Channels
Type
R8882 S9000
TOC
2*60W
[1]
Working Frequency Band
B8
2T2R or 2T4R
[2]
2T4R/2T2R
TX: 925 MHz - 960 MHz
RX: 880 MHz - 915 MHz
R8882 S1800
2*60W
B3
2T4R/2T2R
Type1:
TX: 1805MHz - 1860MHz
RX: 1710MHz - 1765MHz
Type2:
TX: 1825MHz - 1880MHz
RX: 1730MHz - 1785MHz
R8882 S2100
2*60W
B1
2T4R/2T2R
TX: 2110MHz - 2170 MHz
RX: 1920MHz - 1980 MHz
R8882 S2600
2*40W
B7
2T4R/2T2R
TX: 2620MHz -2690MHz
RX: 2500MHz -2570MHz
R8882 S8500
2*60W
B5
2T4R/2T2R
TX: 869MHz - 894MHz
RX: 824MHz - 849MHz
R8882 S1900
2*60W
B2
2T4R/2T2R
TX: 1930MHz - 1990MHz
RX: 1850MHz - 1910MHz
R8882 S7200
2*60W
(APAC 700)
B28
2T2R
TX: 758MHz - 803MHz
RX: 703MHz - 748MHz
R8882 S8000
(DD)
2*40W
B20
2T2R
TX: 791MHz - 821MHz
RX: 832MHz - 862MHz
The TOC here means the max capacity. The specific TOC would be limited by the license.
2T means 2-antenna transmission; 2R means 2-antenna reception; and so on.
16
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ZXSDR R8882 Product Description
Type
TOC
R8882 S8100
2*60W
[1]
Working Frequency Band
B27
2T2R or 2T4R
[2]
2T4R/2T2R
TX: 851MHz - 869MHz
RX: 806MHz - 824MHz
R8882 S1700
2*60W
(AWS)
B4
2T4R/2T2R
TX: 2110 MHz - 2155 MHz
RX: 1710 MHz - 1755 MHz
Note: When “ZGO-04-01-011 Power Boost for 8PSK” is applied in GSM mode, the TOC output
power achieves the same in 8PSK modulation as in GMSK.
3.3
Power Indices
3.3.1
Power Supply
Table 3-8
R8882 Power supply indices
Module
Input Power
DC: -48 V (-37 V–-60 V DC)
R8882 (2*60W)
AC: 110 V/220 V (90 V–290 V AC) (by AC/DC
lightning protection unit)
R8882 (2*40W)
3.3.2
DC: -48 V (-37 V–-60 V DC)
Power Consumption
Table 3-9
R8882 Power Consumption in UMTS Single Mode
Configuration: S2/2, 2PA, TOC 20W/UMTS carrier
Module
Average PC (W)
Peak PC (W)
R8882 S9000
240
345
R8882 S2100
210
320
R8882 S8500
195
290
R8882 S1900
275
410
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ZXSDR R8882 Product Description
Table 3-10
R8882 Power Consumption in GSM Single Mode
Configuration: S4/4, 2PA, TOC 15W/GSM TRX
Module
Average PC (W)
Peak PC (W)
R8882 S9000
290
445
R8882 S1800
280
455
R8882 S8500
240
395
R8882 S1900
320
515
Table 3-11
R8882 Power Consumption in LTE Single Mode
Configuration: LTE single carrier, 2PA, 60W/LTE
Module
Average PC (W)
Peak PC (W)
R8882 S8000 (DD)
185
315
R8882 S2600
215
385
R8882 S7200 (APAC 700)
230
440
R8882 S8100
230
440
R8882 S8500
230
440
R8882 S9000
230
440
R8882 S1800
275
485
R8882 S1900
275
485
R8882 S1700
285
505
R8882 S2100
285
505
Table 3-12
R8882 Power Consumption in GSM/UMTS Dual-Mode
Configuration: 8G2U, TOC 10W/GSM TRX+ 20W/UMTS carrier
Module
Average PC (W)
Peak PC (W)
R8882 S9000
300
445
R8882 S8500
250
395
R8882 S1900
335
515
Table 3-13
R8882 Power Consumption in GSM/LTE Dual-Mode
Configuration: 8G1L, 2PA, TOC 10W/GSM TRX+20W/LTE
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ZXSDR R8882 Product Description
Module
Average PC (W)
Peak PC (W)
R8882 S9000
350
485
R8882 S1800
345
475
Table 3-14
R8882 Power Consumption in UMTS/LTE Dual-Mode
Configuration: 2U1L, TOC 20W/UMTS carrier+20W/LTE
Module
Average PC (W)
R8882 S2100
3.4
300
Peak PC (W)
505
Transmission
R8882 is connected to BBU through CPRI interfaces.
Table 3-15
R8882 CPRI Interfaces
Item
CPRI interface
3.5
Value
Interface Kind
SFP (LC)
Speed
2.4576Gbps
3.072Gbps
Standard
CPRI V4.2
Working Environment
Table 3-16
R8882 Environment Condition Compatibility
Item
Index
Temperature
-40 - +55 °C
Relative humidity
5% - 95%
Waterproof/dustproof
IP65
≤5 Ω; earth resistance can be less than 10 Ω in
Ground
thunder-less area where there less than 20
thunderstorm days per year.
Indoor pack deposited
Storage
Temperature: -40 °C to 70 °C
Relative Humidity: 5% to 100%
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ZXSDR R8882 Product Description
3.6
Electromagnetic Compatibility
YD/T 1595.2-2007
ETSI EN 301 489-01, ETSI EN 301 489-23
ETSI EN 300 386–V1.3.2
(CISPR22) Class B
Directive 1999/5/EC (R&TTE)
3.7
Reliability
In R8882, the algorithm of system reliability conforms to the national military GJB/Z299B
Electronic Equipment Reliability Estimation Manual and US military handbook
MIL-HDBK-217F Electronic Equipment Reliability Estimation.
Table 3-17
R8882 Reliability Characteristics
Item
Index
MTBF
≥464,000 hours
MTTR
1 hour
Availability index
≥99.999784%
Down duration
≤1.133 min/year
Installation
R8882 is easy to be deployed.

It is portable for transportation and flexible installation on the pole, tower and
against wall.

Only fibers, power cables, RF cable antennas, PE and AISG cables need to be
connected.
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ZXSDR R8882 Product Description

It is suitable for any weather condition with IP65 water resistance and dust proof
case.
Configurations
R8882 can be configured as GSM, UMTS, LTE single mode or mixed mode through
software. By choosing different frequencies and software configurations, R8882 can
support various GSM/UMTS/LTE configurations. Both R8882 2T4R and 2T2R modules
support 2*2 MIMO, and R8882 2T4R supports two cells with 1T2R for each cell.
ZTE Confidential & Proprietary
21
ZXSDR R8882 Product Description
Abbreviation
Abbreviation
22
Full Characters
BBU
Base Band processing Unit
BRACS
Barrier Access Control Sub-system
BRS
Barrier Sub-system
BSP
Board Support Package
CAPEX
Capital Expenditure
CPRI
Common Public Radio Interface
DBS
Data Base Sub-system
GSM
Global System for Mobile communications
LMT
Local Maintenance Terminal
LTE
Long Term Evolution
MIMO
Multi Input Multi Output
MTBF
Mean Time Between Failures
MTTR
Mean Time To Recovery
OAM
Operating And Maintenance
OPEX
Operation Expenditure
OSS
Operation Support Sub-system
RF
Radio Frequency
RRU
Remote Radio Unit
RTWP
Received Total Wideband Power
SCS
System Control Sub-system
SDR
Software Defined Radio
UE
User Equipment
UMTS
Universal Mobile Telecommunications System
ZTE Confidential & Proprietary

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Title                           : ZXSDR R8882 Product Description
Author                          : Windows 用户
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Create Date                     : 2015:07:03 11:29:29
Modify Date                     : 2015:07:03 11:29:29
Producer                        : Microsoft® Office Word 2007

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