K-Best Technology Inc. E1 User manual

1

I
Regulatory Noticeϡ ϡ
zTo comply with the relevant FCC regulations, changes or modifications are
not expressly allowed as it will arbitrarily uses or alters the radio frequency
signals in violation, which may void the user’s authority to operate this
equipment.
zLow power radio frequency device must be professionally installed.
zFor safety reasons, the working condition must not alters the RF signal.
When installing this equipment, observe the following precautions to
minimize the danger of personnel injury:
1. Antenna used for this device must be fix-mounted on permanent outdoor
structures to provide 5 meters or more separation from all persons during
device operation to comply with FCC RF exposure requirements.
2. Always disconnect all power connections before installing antenna.

II
Warningϡ ϡ
zIf low power RF devices interference endangers the functioning of a radio
navigation service or of other safety maintenance services or seriously
degrades, obstructs, or repeatedly interrupts a legitimate radio
communication service, it is required to terminate the operation and take
steps to improve so as to eliminate future interference.
zLow power RF devices MUST tolerate all legitimate ISM band
interferences.
zThe above legal telecommunications are based on the
Telecommunications Act of Radio Telecommunication Equipment.

III
Table of Contents
1 Introduction ........................................................................................................................1-1
2 Features.............................................................................................................................2-1
2.1 E1 Spread Spectrum Radios............................................................................................................... 2-1
2.2 Core Technology ................................................................................................................................. 2-1
2.3 Composition and Principle .................................................................................................................. 2-2
2.3.1 System Composition............................................................................................................................................ 2-2
2.3.2 System Principle ................................................................................................................................................. 2-2
3 Technological Characteristics ............................................................................................3-1
4 Product Description............................................................................................................4-1
4.1 Indoor(IDU)/Modem ............................................................................................................................ 4-1
4.1.1 General Description ........................................................................................................................................... 4-2
4.2 Outdoor(ODU)/RF Unit........................................................................................................................ 4-7
4.2.1 General Description ........................................................................................................................................... 4-7
4.3 Date Port Guide .................................................................................................................................. 4-8
5 Interface.............................................................................................................................5-1
5.1 Front Panel.......................................................................................................................................... 5-1
5.1.1 Engineering Order Wire(EOW) .......................................................................................................................... 5-1
5.1.2 LCD Description ................................................................................................................................................ 5-2
5.2 LCD Operation .................................................................................................................................... 5-5
5.2.1 IDU Info ............................................................................................................................................................. 5-5
5.2.2 ODU Info.......................................................................................................................................................... 5-10
5.2.3 Test Item............................................................................................................................................................ 5-12
5.2.4 Remote Info....................................................................................................................................................... 5-20
5.2.5 IP Info............................................................................................................................................................... 5-22
5.2.6 LAN Info ........................................................................................................................................................... 5-25
5.2.7 Self Test Info ..................................................................................................................................................... 5-27
5.2.8 Link Info ........................................................................................................................................................... 5-29
6 Environmental Condition....................................................................................................6-1
6.1 Cable................................................................................................................................................... 6-1
6.2 Operating Temperature Range ........................................................................................................... 6-1
6.3 DC Input Voltage ................................................................................................................................. 6-1
6.4 Power Consumption............................................................................................................................ 6-1
6.5 Humidity .............................................................................................................................................. 6-1
7 Configuration .....................................................................................................................7-1
7.1 Configure via Telnet ............................................................................................................................ 7-1

IV
7.2 Configure via HyperTerminal............................................................................................................... 7-3
8 Textmenu Details ...............................................................................................................8-1
8.1 Network ............................................................................................................................................... 8-1
8.1.1 NMS1 Serial Interface ........................................................................................................................................ 8-2
8.1.2 NMS2 Serial Interface ........................................................................................................................................ 8-3
8.1.3 NMS2 Dial Setting.............................................................................................................................................. 8-4
8.1.4 Link Serial Interface........................................................................................................................................... 8-5
8.1.5 Ethernet IP Address Setting ................................................................................................................................ 8-6
8.1.6 Interface Status ................................................................................................................................................... 8-6
8.1.7 IP Forwarding .................................................................................................................................................... 8-7
8.1.8 IP Routing........................................................................................................................................................... 8-7
8.1.9 SNMP Setting...................................................................................................................................................... 8-8
8.2 Terminal............................................................................................................................................. 8-10
8.2.1 ODU ................................................................................................................................................................. 8-10
8.2.2 IDU....................................................................................................................................................................8-11
8.2.3 Link................................................................................................................................................................... 8-12
8.2.4 User I/O............................................................................................................................................................ 8-13
8.2.5 Cross Connect .................................................................................................................................................. 8-14
8.2.6 Alarm Mask Setting .......................................................................................................................................... 8-15
8.2.7 LAN................................................................................................................................................................... 8-16
8.2.8 Status ................................................................................................................................................................ 8-17
8.2.9 Alarm Status ..................................................................................................................................................... 8-17
8.2.10 Tributary Input Status .................................................................................................................................. 8-18
8.2.11 User I/O Status............................................................................................................................................. 8-18
8.2.12 Get Event Record ......................................................................................................................................... 8-19
8.2.13 Test............................................................................................................................................................... 8-21
8.2.14 PRBS............................................................................................................................................................ 8-22
8.2.15 Unit Identification........................................................................................................................................ 8-23
8.3 Change Password............................................................................................................................. 8-24
8.4 Set System Date and Time ............................................................................................................... 8-24
8.5 Update Standby Configuration .......................................................................................................... 8-25
8.6 Restart............................................................................................................................................... 8-25
8.7 Load Default Configuration ............................................................................................................... 8-26
8.8 Firmware Download .......................................................................................................................... 8-26
8.9 User Management............................................................................................................................. 8-27
9 Management Application Structure ....................................................................................9-1
9.1 Managment via Local Equipment(Normal) ......................................................................................... 9-1

V
9.2 Managment via Local Equipment(Cascading) .................................................................................... 9-2
9.3 Remote Management via External Modem ........................................................................................ 9-3
10 Appendices ......................................................................................................................10-1
10.1 Specifications .................................................................................................................................... 10-1
10.2 LCD Alarm Items ............................................................................................................................... 10-5
10.3 LCD Function .................................................................................................................................... 10-6
10.4 Spread Spectrum Plan ...................................................................................................................... 10-9
10.5 ODU IF & RF Status........................................................................................................................ 10-10
10.5.1 5.8GHz Status ............................................................................................................................................ 10-10
10.6 The Definition of Pins .......................................................................................................................10-11
10.7 Installation Guide ............................................................................................................................ 10-14
10.7.1 Parts of ODU assembly ............................................................................................................................. 10-14
10.7.2 ODU Installation Diagram........................................................................................................................ 10-15
10.7.3 IDU+ODU Quick Installation ................................................................................................................... 10-16
10.8 RSL and Link Budget ...................................................................................................................... 10-17
10.9 Troubleshooting............................................................................................................................... 10-18
10.9.1 Can Not Establish a Link........................................................................................................................... 10-18
10.9.2 Establish a Link but Poor Performance..................................................................................................... 10-19
10.9.3 Pre-RMA and RMA Procedure Notification............................................................................................... 10-20

VI
Figures
Figure 2-1 E1 IDU Block Diagram ............................................................................................................................ 2-2
Figure 4-1 Front Panel (4E1,BNC) ........................................................................................................................... 4-1
Figure 4-2 Front Panel (4E1,RJ-48) ......................................................................................................................... 4-1
Figure 4-3 Front Panel (16E1+LAN,RJ-48) .............................................................................................................. 4-1
Figure 4-4 LCD Display ............................................................................................................................................ 4-3
Figure 4-5 LCD Function Key ................................................................................................................................... 4-4
Figure 4-6 Type C Relay Output Diagram ................................................................................................................ 4-5
Figure 4-7 User I/O Port DB-26 pin .......................................................................................................................... 4-5
Figure 4-8 ODU Display............................................................................................................................................ 4-7
Figure 4-9 Data Port Settings (1).............................................................................................................................. 4-8
Figure 4-10 Data Port Settings (2)............................................................................................................................ 4-9
Figure 4-11 Data Port Settings (3) ............................................................................................................................ 4-9
Figure 4-12 Data Port Settings (4).......................................................................................................................... 4-10
Figure 5-1 IDU Function Tree ................................................................................................................................... 5-2
Figure 5-2 LCD Function Keys (1) ............................................................................................................................ 5-2
Figure 5-3 LCD Function Keys (2) ............................................................................................................................ 5-3
Figure 5-4 Alarm Status ............................................................................................................................................ 5-4
Figure 5-5 Alarm Function ........................................................................................................................................ 5-4
Figure 5-6 Buzzer OFF ............................................................................................................................................. 5-4
Figure 5-7 IDU Info ................................................................................................................................................... 5-5
Figure 5-8 EOW No:n ............................................................................................................................................... 5-5
Figure 5-9 IDU Type: nXE1....................................................................................................................................... 5-6
Figure 5-10 Code:HDB3/AMI.................................................................................................................................... 5-6
Figure 5-11 Code Switch (1) ..................................................................................................................................... 5-7
Figure 5-12 Code Switch (2)..................................................................................................................................... 5-7
Figure 5-13 Code Switch (3)..................................................................................................................................... 5-7
Figure 5-14 Code Switch (4)..................................................................................................................................... 5-8
Figure 5-15 AUX1:RS232/RS422 ............................................................................................................................. 5-8
Figure 5-16 AUX2:ASY-CH/SYN-CH ........................................................................................................................ 5-8
Figure 5-17 I-Temp:nк............................................................................................................................................. 5-9
Figure 5-18 Buzzer:On/Off........................................................................................................................................ 5-9
Figure 5-19 Restart EMU:Y/N................................................................................................................................. 5-10
Figure 5-20 Power:-36~-72V .................................................................................................................................. 5-10
Figure 5-21 ODU Info ............................................................................................................................................. 5-10
Figure 5-22 RF-CH:n ...............................................................................................................................................5-11

VII
Figure 5-23 TxL-SET:ndBm .....................................................................................................................................5-11
Figure 5-24 SSPA:On/Off.........................................................................................................................................5-11
Figure 5-25 O-Temp:nк......................................................................................................................................... 5-12
Figure 5-26 Test Item.............................................................................................................................................. 5-12
Figure 5-27 Enter Password ................................................................................................................................... 5-13
Figure 5-28 Tn-L-LP:En/Dis (1) .............................................................................................................................. 5-13
Figure 5-29 Tn-L-LP:En/Dis (2) .............................................................................................................................. 5-13
Figure 5-30 Tn-L-LP:En/Dis (3) .............................................................................................................................. 5-14
Figure 5-31 Tn-L-LP:En/Dis (4) .............................................................................................................................. 5-14
Figure 5-32 Tn-R-LP:En/Dis (1).............................................................................................................................. 5-15
Figure 5-33 Tn-R-LP:En/Dis (2).............................................................................................................................. 5-16
Figure 5-34 Tn-PRBS:En/Dis.................................................................................................................................. 5-16
Figure 5-35 Ber-Clear ............................................................................................................................................. 5-17
Figure 5-36 Count-Add:n ........................................................................................................................................ 5-18
Figure 5-37 P-Acc-T:nS .......................................................................................................................................... 5-18
Figure 5-38 IF-Loop:En/Dis (1) ............................................................................................................................... 5-19
Figure 5-39 IF-Loop:En/Dis (2) ............................................................................................................................... 5-19
Figure 5-40 RF-Loop:En/Dis................................................................................................................................... 5-20
Figure 5-41 Close-Test ........................................................................................................................................... 5-20
Figure 5-42 Remote Info......................................................................................................................................... 5-20
Figure 5-43 Link ID:n .............................................................................................................................................. 5-21
Figure 5-44 Far-End:OK/Alarm/Loss/Test .............................................................................................................. 5-21
Figure 5-45 R-AUX1:RS-232/RS-422..................................................................................................................... 5-22
Figure 5-46 R-AUX2:ASY-CH/SYN-CH .................................................................................................................. 5-22
Figure 5-47 ETH IP:................................................................................................................................................ 5-22
Figure 5-48 ETH Mask:........................................................................................................................................... 5-23
Figure 5-49 NMS1 IP: ............................................................................................................................................. 5-23
Figure 5-50 NMS1 Peer IP: .................................................................................................................................... 5-23
Figure 5-51 NMS2 IP: ............................................................................................................................................. 5-24
Figure 5-52 NMS2 Peer IP: .................................................................................................................................... 5-24
Figure 5-53 Link IP: ................................................................................................................................................ 5-24
Figure 5-54 Link Peer IP:........................................................................................................................................ 5-25
Figure 5-55 LAN Info .............................................................................................................................................. 5-25
Figure 5-56 LAN-Port:Dis/1E1/2E1/3E1/4E1.......................................................................................................... 5-25
Figure 5-57 Actual:None/1E1/2E1/3E1/4E1 ........................................................................................................... 5-26
Figure 5-58 Auto-Nego:None/Dis/En ...................................................................................................................... 5-26
Figure 5-59 Duplex:None/Full/Half ......................................................................................................................... 5-26

VIII
Figure 5-60 Speed:None/10M/100M ...................................................................................................................... 5-27
Figure 5-61 Buffer:None/Small/Large..................................................................................................................... 5-27
Figure 5-62 Self Test Info........................................................................................................................................ 5-27
Figure 5-63 S-Test:Start/Testing ............................................................................................................................. 5-28
Figure 5-64 S-Test Result ....................................................................................................................................... 5-28
Figure 5-65 Clost-Test ............................................................................................................................................ 5-29
Figure 5-66 Link Info............................................................................................................................................... 5-29
Figure 5-67 Link ID:n .............................................................................................................................................. 5-29
Figure 5-68 MODEM:ON/OFF ................................................................................................................................ 5-30
Figure 7-1 Configuration Process of telnet (1).......................................................................................................... 7-1
Figure 7-2 Configuration Process of telnet (2).......................................................................................................... 7-2
Figure 7-3 Configuration Process of telnet (3).......................................................................................................... 7-2
Figure 7-4 Enter Username ...................................................................................................................................... 7-2
Figure 7-5 Enter Password ....................................................................................................................................... 7-3
Figure 7-6 Configuration Process of HyperTerminal (1) ........................................................................................... 7-4
Figure 7-7 Configuration Process of HyperTerminal (2) ........................................................................................... 7-4
Figure 7-8 Configuration Process of HyperTerminal (3) ........................................................................................... 7-4
Figure 7-9 Configuration Process of HyperTerminal (4) ........................................................................................... 7-5
Figure 7-10 Configuration Process of HyperTerminal (5) ......................................................................................... 7-5
Figure 8-1 Main Menu of Textmenu .......................................................................................................................... 8-1
Figure 8-2 Network ................................................................................................................................................... 8-2
Figure 8-3 NMS1 Serial Interface ............................................................................................................................. 8-2
Figure 8-4 NMS2 Serial Interface ............................................................................................................................. 8-3
Figure 8-5 NMS2 Dial Setting ................................................................................................................................... 8-4
Figure 8-6 Link Serial Interface................................................................................................................................. 8-5
Figure 8-7 Ethernet IP Address Setting .................................................................................................................... 8-6
Figure 8-8 Interface Status ....................................................................................................................................... 8-6
Figure 8-9 IP Forwarding .......................................................................................................................................... 8-7
Figure 8-10 IP Routing.............................................................................................................................................. 8-7
Figure 8-11 Active IP Routing ................................................................................................................................... 8-8
Figure 8-12 SNMP Setting........................................................................................................................................ 8-8
Figure 8-13 Trap ....................................................................................................................................................... 8-9
Figure 8-14 Terminal............................................................................................................................................... 8-10
Figure 8-15 ODU..................................................................................................................................................... 8-10
Figure 8-16 IDU .......................................................................................................................................................8-11
Figure 8-17 Link ...................................................................................................................................................... 8-12
Figure 8-18 User I/O ............................................................................................................................................... 8-13

IX
Figure 8-19 Cross Connect..................................................................................................................................... 8-14
Figure 8-20 Cross Connection Diagram ................................................................................................................. 8-14
Figure 8-21 Alarm Mask Setting ............................................................................................................................. 8-15
Figure 8-22 LAN...................................................................................................................................................... 8-16
Figure 8-23 Status................................................................................................................................................... 8-17
Figure 8-24 Alarm Status ........................................................................................................................................ 8-17
Figure 8-25 Tributary Input Status .......................................................................................................................... 8-18
Figure 8-26 User I/O Status .................................................................................................................................... 8-18
Figure 8-27 Get Event Record................................................................................................................................ 8-19
Figure 8-28 Get Event Record(1) ........................................................................................................................... 8-20
Figure 8-29 Get Event Record(2) ........................................................................................................................... 8-20
Figure 8-30 Get Event Record(3) ........................................................................................................................... 8-20
Figure 8-31 Get Event Record(4) ........................................................................................................................... 8-21
Figure 8-32 Get Event Record(5) ........................................................................................................................... 8-21
Figure 8-33 Test ...................................................................................................................................................... 8-21
Figure 8-34 PRBS................................................................................................................................................... 8-22
Figure 8-35 Loopback............................................................................................................................................. 8-23
Figure 8-36 Unit Identification................................................................................................................................. 8-23
Figure 8-37 Change Password ............................................................................................................................... 8-24
Figure 8-38 Set System Date and time .................................................................................................................. 8-24
Figure 8-39 Update Standby Configuration ............................................................................................................ 8-25
Figure 8-40 Restart................................................................................................................................................. 8-25
Figure 8-41 Load Default Configuration ................................................................................................................. 8-26
Figure 8-42 Firmware Download ............................................................................................................................ 8-26
Figure 8-43 User Management............................................................................................................................... 8-27
Figure 9-1 Managment via Local Equipment(Normal).............................................................................................. 9-1
Figure 9-2 Managment via Local Equipment(Cascading) ........................................................................................ 9-3
Figure 9-3 Remote Management via External Modem............................................................................................. 9-4
Figure 10-3 Side A IF & RF Status........................................................................................................................ 10-10
Figure 10-4 Side B IF & RF Status ....................................................................................................................... 10-10
Figure 10-5 Part accessories................................................................................................................................ 10-14
Figure 10-6 ODU Installation Diagram.................................................................................................................. 10-15
Figure 10-7 IDU & ODU Connection Diagram...................................................................................................... 10-16
Figure 10-8 RSL and Link Budget ........................................................................................................................ 10-17

X
Tables
Table 4-1 Accessories List ........................................................................................................................................ 4-1
Table 4-2 Definition of LED ....................................................................................................................................... 4-2
Table 4-3 Function Key Modes ................................................................................................................................. 4-4
Table 4-4 The Definition of LED in Ethernet Transmission Port ............................................................................... 4-6
Table 5-1 Loopback Test Lists ................................................................................................................................ 5-14
Table 9-1 Example for managerial application(1) ..................................................................................................... 9-1
Table 9-2 Example for managerial application(2) ..................................................................................................... 9-3
Table 9-3 Example for managerial application(3) ..................................................................................................... 9-4
Table 10-1 Transmitter& Receiver .......................................................................................................................... 10-1
Table 10-2 Digital Line Interface ............................................................................................................................. 10-1
Table 10-3 IDU Structure ........................................................................................................................................ 10-2
Table 10-4 Temperature and Environment ............................................................................................................. 10-2
Table 10-5 Network Management System.............................................................................................................. 10-2
Table 10-6 IF Cable ................................................................................................................................................ 10-2
Table 10-7 Power .................................................................................................................................................... 10-3
Table 10-8 Service Channel.................................................................................................................................... 10-3
Table 10-9 LCD Alarm Items................................................................................................................................... 10-5
Table 10-10 LCD Function ...................................................................................................................................... 10-6
Table 10-23 5.8GHz Spread Spectrum List (16E1, Side A) .................................................................................... 10-9
Table 10-24 5.8GHz Spread Spectrum List (16E1, Side B).................................................................................... 10-9
Table 10-25 DB9 female pins of NMS1 .................................................................................................................10-11
Table 10-26 DB9 male pins of NMS2.....................................................................................................................10-11
Table 10-27 DB9 female pins of AUX1 (V.28)........................................................................................................10-11
Table 10-28 DB9 female pins of AUX1 (V.11) ........................................................................................................10-11
Table 10-29 DB26 pins of USER I/O .................................................................................................................... 10-12
Table 10-30 DB25 pins of AUX2 ........................................................................................................................... 10-12
Table 10-31 Balanced E1 Interface(RJ-48) .......................................................................................................... 10-13

Features
E1 Spread Spectrum Radios
1-1
1 Introduction
E1 Spread Spectrum Radios has been developed in these recent ten years to a high frequency microwave,
digital de/modulation, integrated digital multiplexing, computer control and signal communication technique
wholly into Wireless Digital Telecommunication.
E1 Spread Spectrum Radios has been extensively use in post and telecommunication service, electric power,
military affairs, various specialized network especially in the interconnection between base stations of mobile
communication, large enterprises, schools and universities network connection. It is regarded as one of the
quickest linkage method and has been largely used in incidental and urgent telecommunication needs.

Features
E1 Spread Spectrum Radios
2-1
2 Features
2.1 E1 Spread Spectrum Radios
E1 Spread Spectrum Radios is different from the traditional microwave equipment in smaller size, lighter
weight, easy set up and can be conveniently moved from place to place. The main characteristics lie in its
advantageous use of high frequency band microwave transmission, digital process, concise structure, quick
connection and adapt to complex topographical structure. Extensively use in nested mobile phone base
station’s interconnection and signal transmission, short distance local connection and urgent communication.
Public and specialized network has large application as well. The present wireless low frequency band is
jam-packed and with the demand to build a quicker communication network, the use of high frequency band
E1 Spread Spectrum Radios becomes especially meaningful.
2.2 Core Technology
The technologies incorporated in E1 Spread Spectrum Radios include:
(1) High frequency microwave RF unit and other related RF components design technique (PA, LNA, MIX,
DUX etc.)
(2) High frequency Synthesizer
(3) High amplifier gain control technique
(4) Advanced QPSK de/modulation
(5) Microwave frame multiplexer
(6) Digital equalizer
(7) FEC:Forward Error Correction
(8) Random N*E1 multiplexer, where N=1~16
(9) Digital cross-connection
(10) Computer monitors and relays
(11) Network management
(12) Digital service
(13) Highly efficient and improved overall design
ϡAudio frequency: Each voice signal is 64kbps. It has 8kHz sample, 8bits-per-sample, A/D and D/A
conversions.
ϡE1 is European Standard. 1*E1 is 30 voice channels, plus a frame control and a signaling i.e. 32*64kbps =
2.048Mbps

Features
E1 Spread Spectrum Radios
2-2
2.3 Composition and Principle
2.3.1 System Composition
E1 Spread Spectrum Radios is composed of the Outdoor Unit (ODU) and the Indoor Unit (IDU). Other
accessories include the antenna systems and terminals.
ODU is the Rx/Tx unit of microwave signal. It is composed of microwave components (amplifier, LNA,
up/downconverter, frequency synthesizer etc.), duplexer, IF unit (include dual converter, local oscillator, IF
processing segment etc.), monitor unit, remote unit, and power processing board.
IDU mainly comprised of QPSK modulator, multiplexer, monitor unit, NMS, digital service, power system, other
interfaces etc.
Antenna systems include antenna, connectors and other installation accessories for fixing to the pole or stand.
ODU and IDU are connected by an IF cable.
Figure 2-1 E1 IDU Block Diagram
2.3.2 System Principle
N number of E1 signals, digital service, 9600bps system net control and 9600bps data relays multiplexed in a
multiplexer to a specific microwave frame code. After QPSK modulation, the system sends the transmission to
the ODU through an IF cable. It enter the ODU IF upstream balance circuit, upconverter, power amplifier, filter,

Features
E1 Spread Spectrum Radios
2-3
duplexer and are then transmitted out through the antenna system.
The opposite terminal’s antenna system receives the microwave signals and passed on to the multiplexer, LNA,
downconverter, filter, dual conversion and the IDU. In the IDU, it passes through the QPSK demodulator to
recover the microwave frame signal. This frame signal is then processed through demultiplexer to recover the
N number of E1 signal and other service signal.
The monitor unit of the equipment is controlled by the CPU (central processing unit) to function as: monitoring,
controlling, dispatching, alarming, processing and signaling etc. Based on the statistical result of BER test in
the multiplexer, we have 10-3BER, 10-6BER and frame loss signals.
Digital service adopts the Analog rule of 64kbps and PCM (Pulse Code Modulation) for service relay, complete
address selection and full address function. Simulating transfer completes the multiple categorized public
affairs connection. The dialing mode adopts DTMF system.
System network management uses PC machine of Intel Pentium II and above operating system.
Under Microsoft Windows environment’s using Telnet software, it is possible to relay between equipment,
collect all the equipment’s status in the network and select records for printing.

Technological Characteristics
E1 Spread Spectrum Radios
3-1
3 Technological Characteristics
Traditional digital microwave equipment generally transmits E1 signal only, so there is always the need to
apply for frequency channel use because of technological limitations.
In recent years, there is a dramatic change in the structure, composition and application of digital microwave
communicative equipment. The traditional system of transmission has been changed to the integration of
transmitter and receiver as well as from fixed frequency to the possibility of frequency conversion from low to
high frequency band. In view of the high frequency digital microwave communication system’s new changes
and additional newer characteristics, we had already improved the traditional system to a great length
E1 Spread Spectrum Radios has the following technological characteristics:
-- Complete capacity: 2*E1Ε4*E1sΕ8*E1Ε16*E1
-- Simplified set up: The ODU’s Signal Indicator indicates the correct angle adjustment of the antenna
-- Flexible interface: suitable for multiple network and service links
-- IDU and ODU unit connected by a single IF cable up to 200m length, thereby, decreasing the RF
transmission loss and increasing the receiving signal-to-noise ratio (S/N)
-- Channel conversion function reduce the cost of large and flexible network deployment
-- Digitally advanced QPSK de/modulation
-- Powerful monitoring function: simple and easy to operate LCD display. With the overall status display and
loopback test function, users can easily maintain the system without the need of special equipment to
ascertain any malfunction
-- Improved network management system suit a lot of different network topological structure. It can manage up
to 255 station equipments and also extend the monitoring support to other microwave equipments
-- Quick and easy installation

Product Description
E1 Spread Spectrum Radios
4-1
4 Product Description
4.1 Indoor(IDU)/Modem
Figure 4-1 Front Panel (4E1,BNC)
Figure 4-2 Front Panel (4E1,RJ-48)
Figure 4-3 Front Panel (16E1+LAN,RJ-48)
Table 4-1 Accessories List
No. Item Qty
1 RS-232 Cable 1
2 Cross-over Cat.5 Cable 1
3 -48V Power Cord 1
4 Grounding Cable 1
5 Fuse 1
A
B
CE
J
FGH
KLM N O
D
P
Q

Product Description
E1 Spread Spectrum Radios
4-2
4.1.1 General Description
A. Service Phone Interface(EOW): Service phone between the stations. Insert the RJ-11 of any general
phones and dial the IDU EOW number. If there are more than one equipments in the same network, you
may dial “***” for group connection. All the phones in the network will ring.
B. Symmetric E1 connector (RJ-48): 2E1: 2*RJ-48Ε4E1: 4* RJ-48Ε8E1: 8* RJ-48Ε16E1: 16* DB-25
(asymmetric). In this manual, we have taken 4E1 equipment as an example for easy explanation.
C. LED: FINE indicates normal working condition. ALM indicates critical alarming condition. RMT indicates
remote unstable condition. TEST indicates system undergoing loopback test.
Table 4-2 Definition of LED
Item Definition
Flashes @ 4Hz System is initializing
ON System is initializing or system is working well
FINE(green)
OFF Severe alarm happens (which affects normal communication)
Flashes @ 4Hz Minor alarm happens(which doesn’t affect normal
communication)
ON On when alarm happens(which affects normal communication)
ALM(red)
OFF No alarm
TEST(yellow) System is testing itself
Flashes @ 4Hz Can’t connect with remote equipment
ON MUX alarm happens on remote equipment
RMT(brown)
OFF Remote equipment is working well
D. LCD Display: LCD display is a standard LCD panel with 16 characters in a line, 2 lines in the panel.
Display the normal working temperature; transmit/receive power, capacity, frequency, BER and system
time.

Product Description
E1 Spread Spectrum Radios
4-3
Figure 4-4 LCD Display
E. Data Port 2 (AUX2): Synchronous/asynchronous data port. In asynchronous communication, you could
implement asynchronous data transmission which data rate is smaller than or equal to 19.2Kbps via this
port. In synchronous data transmission, this port would be a 64Kbps channel which customer could
implement RS-422 data transmission via this port. This RS-422 is a contradirection channel which
input/output clock both comes from IDU. When local equipment should communicate with remote site
equipment for simple data file transmission or online text communication, this port could be used.
F. String Port (NMS2): This port is for interconnection of NMS1 & NMS2 port between two equipments, or
between computer & NMS2 port. It also could be used as a connection port for modem which allows
customer to implement remote access. When there are more than two sets of equipments in the local
stations, connect the IDU-NMS2 of this equipment to the IDU-NMS1 of the other equipment. When the
NMS2 are connected, only one of the service phones is working.
G. Monitor port (NMS1): This port is for cascading connection between two equipments, or PPP network
connection between computer & NMS1 port. Connect the COM1 or COM2 (RS-232) of the computer to
this port or act as a connection between more stations.
H. IF Port (N-Type 50ȍ): Transmission includes transmitter 310MHz, receiver 70MHz, monitor
11.0592MHz, DC -48V/0.5A. Maximum transmission of 100m possible when using RG-6 cable.
Maximum transmission 200m possible when using RG-8 cable.
I. Grounding
J. LCD Function Keys: Under normal working condition, LCD back light will glows if any button is pressed,
LCD Display refreshes
every 1~2 second

Product Description
E1 Spread Spectrum Radios
4-4
If there is any alarm, the LCD backlight will automatically glows for 2 minutes and display the alarming
status. The buzzer goes off until it is turn off. To shut off the buzzer temporarily, press SEL.
Figure 4-5 LCD Function Key
Table 4-3 Function Key Modes
Item Display Mode Edit Mode
ESC Escape from current screen. Stop edit modem.
SEL
Turn off buzzer on alarm condition. zSwitch between Adjust and Position mode.
zSelect digit number on Adjust modem. Mainly for enter of
password.
(Right)
Switch to next-level screen . zMove to next position on Position Mode.
zIncrease the value of current digit on Adjust Mode.
(Left)
Switch to last-level screen . zMove to last position on Position Mode.
zDecrease the values of current digit on Adjust Mode.
OK
zChoose a sub-function.
zActivate edit mode for a
function .
zSet up or stop edit mode.
zFinishing the enter process of password.
K. User I/O Port: Allows users to fully monitor the central controlling room from the local station. For
example: In the absence of human control in the remote stations, the central controlling server is able to
receive all the data like fire alarms, power supply etc. It can also control the light switches, oil switches
etc. This function totally realizes the possibility of intelligent management. Altogether, there are 8 input
ports and 4 output ports.
User Input Pots: IDU has been equipped with 8 inputs which are used for monitoring the
environment. 4 of them have only 1 input and the rest 4 of them have 2 inputs. User could monitor
conditions such as temperature alarm, invasion alarm, and fire alarm of base station via these ports.
The isolation voltage of Input opticcoupler is 2500Vr.m.s and forward current of input is IF=50Ma
and forward voltage is 1.2-1.4V. As for the input voltage which has 1 input is more than 2.5V, the
level is high. When input voltage is less than 2 V, the level is low. As for the input voltage of A-K