Zte Unitrans ZXMP M600 Technical Instructions
  1. Manuals
  2. Brands
  3. Zte Manuals
  4. Network Hardware
  5. Unitrans ZXMP M600
  6. Technical instructions
Zte Unitrans ZXMP M600 Technical Instructions

Zte Unitrans ZXMP M600 Technical Instructions

Metro cwdm equipment
Hide thumbs
Table of Contents

Advertisement

Quick Links

ZXMP M600 (V1.0)
Metro CWDM Equipment
Technical Manual
ZTE CORPORATION

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Unitrans ZXMP M600 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Zte Unitrans ZXMP M600

Summary of Contents for Zte Unitrans ZXMP M600

  • Page 1 ZXMP M600 (V1.0) Metro CWDM Equipment Technical Manual ZTE CORPORATION...
  • Page 2 Copyright © ZTE Corporation All rights reserved. No part of this documentation may be excerpted, reproduced, translated, annotated or duplicated, in any form or by any means without the prior written permission of ZTE Corporation. ZTE CORPORATION ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Nanshan District, Shenzhen, P.R. China Website: http://www.zte.com.cn...
  • Page 3 FAX: +86-755-26770160 Suggestions and Feedback To improve the quality of ZTE product documentation and offer better services to our customers, we hope you can give us your suggestions and comments on our documentation and fax this form to +86-755-26770160; or mail to “Marketing center 3 floor ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Nanshan District, Shenzhen, P.
  • Page 5 Preface About This Manual This manual is applicable to Unitrans ZXMP M600 (V1.0) Metro CWDM Equipment (ZXMP M600 for short). The ZXMP M600 is a wavelength division equipment belonging to the metropolitan area optical network product series developed by ZTE. This equipment is capable of transparently transmitting signals at various rates and services.
  • Page 6 Chapter 3 System Functions deals with the functions of the ZXMP M600 and their implementation, including the transmission function, Service multiplexing function and protection function. Chapter 4 System Configurations and Networking Modes introduces the networking modes supported by the ZXMP M600, the system configuration requirements and networking examples.
  • Page 7 Mouse Operation Convention Format Description Refers to clicking the primary mouse button (usually the left mouse Click button) once Refers to quickly clicking the primary mouse button (usually the left Double-click mouse button) twice Refers to clicking the secondary mouse button (usually the right mouse Right-click button) once.
  • Page 8 Indicates a suggestion or hint to make things easier or more productive for the reader Statement: The actual product may differ from what is described in this manual due to frequent update of ZTE products and fast development of technologies. Please contact the local ZTE office for the latest updating...

  • Page 9: Table Of Contents

    Contents 1 System Overview .............................1-1 1.1 System Background ........................1-1 1.1.1 MAN ...........................1-1 1.1.2 Wavelength Division Multiplexing Technique..............1-4 1.2 System Structure ..........................1-6 1.2.1 Structure of Hardware System ....................1-6 1.2.2 Structure of Network Management Software System ............1-9 1.3 System Features ...........................1-12 1.4 Applicable Standards/Recommendations..................1-14 2 Technical Indices .............................2-1 2.1 System Indices ..........................2-1 2.2 Structure Indices..........................2-2...
  • Page 10 2.7 Optical safety and electrical safety ....................2-6 2.8 Indices of System Component Parts ....................2-7 2.8.1 Performance Indices of OMD..................... 2-7 2.8.2 Performance Indices of OAD Units..................2-8 2.8.3 OTU Interface Indices ...................... 2-10 2.8.4 Performance Indices of Optical Supervisor Channel............2-13 2.8.5 SRM42 Interface Indices ....................
  • Page 11 4.1.3 Metro OADM Equipment (OADM) ...................4-2 4.2 Networking Mode ..........................4-2 4.2.1 Point-to-point Networking ....................4-2 4.2.2 Chain Networking .......................4-2 4.2.3 Ring Networking.........................4-2 4.2.4 Ring-to-chain Networking ....................4-2 4.3 Configuration Example ........................4-2 4.3.1 Configuration Implementation ....................4-2 4.3.2 Application Features......................4-2 Appendix A Term Description........................A-2 Appendix B Abbreviations ........................
  • Page 13 List of Figures Fig. 1.1-1 Basic Structure of MAN ....................1-3 Fig. 1.2-1 Functional Structure of the ZXMP M600 Equipment ............1-6 Fig. 1.2-2 Functional Structure of OTM Equipment.................1-8 Fig. 1.2-3 Functional Structure of OADM Equipment ..............1-8 Fig. 1.2-4 Structure of the Network Management Software System..........1-9 Fig.
  • Page 14 Fig. 4.3-1 Networking in a Typical Configuration Example ............4-2 Fig. 4.3-2 Service Requirements....................... 4-2 Fig. A.9-1 Optical Transmission Over Interface Made of Uneven Media ........A-2 Fig. A.9-2 Optical Dispersion Over a Fiber..................A-2 -ii-...
  • Page 15 List of Tables Table 2.2-1 Outline Dimensions and Weight Indices of the ZXMP M600 Component Parts...2-2 Table 2.3-1 Power Consumption Indices of the ZXMP M600 Boards/Units........2-3 Table 2.4-1 Temperature and Humidity Requirements ..............2-5 Table 2.5-1 Wavelength Distribution of the ZXMP M600 Equipment (with ordinary fibers adopted) ................................2-6 Table 2.8-1 Performance Indices of OMD ..................2-8 Table 2.8-2 Performance Indices of OAD Units ................2-9...

  • Page 17: System Overview

    1.1 System Background The ZXMP M600 is the metro CDWM system developed by ZTE. It features large optical transmission capacity and can implement transparent transmission of various services at multiple rates. It can be applied to the convergence and access layers of large MANs as well as various layers of middle- and small-sized MANs.
  • Page 18 ZXMP M600 (V1.0) Technical Manual adopted in it are widely used for commercial purposes, while the user and service management is flexibly and convenient. The MAN features broadband capacity and rate, efficient transmission of information and diversified access methods. It obtains the contents locally, offers user-defined access, provides characteristic services and can deploy new services quickly.

  • Page 19: Fig. 1.1-1 Basic Structure Of Man

    Chapter 1 System Overview Fig. 1.1-1 shows the basic structure of a MAN. Backbone layer MOADM MOADM Core layer MOADM Service and management center Convergence layer MSTP MSTP MSTP Access layer Router MSTP: multi-service transmit platform OADM: metro OADM Fig. 1.1-1 Basic Structure of MAN Horizontal division A MAN can also be horizontally divided into the service layer and transmission layer.

  • Page 20: Wavelength Division Multiplexing Technique

    ZXMP M600 (V1.0) Technical Manual 1.1.1.3 Features of Metro Optical Network Large service access capacity The rapid development of MAN service causes the acute increase in the demand for bandwidth. This demand can only be met by large-capacity metro optical network.
  • Page 21 Chapter 1 System Overview equipment to transmit optical signal service and implement balanced management of optical power on the whole line. In the DWDM system, the selection of wavelength and the frequency intervals should conform to ITU-T Recommendation G.692. The working wavelength range of the DWDM system is 1528.77nm~1560.61nm and the corresponding working frequency range is 196.1THz~192.1THz.

  • Page 22: System Structure

    ZXMP M600 (V1.0) Technical Manual The CWDM system adopts uncooled laser and multiplexer/demultiplexer. Compared to DWDM, it boasts shorter transmission distance and lower cost and is suitable for the construction of MAN. 1.2 System Structure The structure of the ZXMP M600 equipment is shown in Fig. 1.2-1. Fig.
  • Page 23 Chapter 1 System Overview The line signals meet the requirements specified in ITU-T recommendation G.694.2. Service convergence platform It converges multiple channels of low rate signals into one wavelength for transmission and implements the reserve process. The low rate signals include standard STM-1, STM-4 signals with the maximum rate being 2.5Gbit/s on the line.

  • Page 24: Fig. 1.2-2 Functional Structure Of Otm Equipment

    ZXMP M600 (V1.0) Technical Manual 1.2.1.2 System Configuration The ZXMP M600 can either be configured as OTM equipment or OADM equipment. The OTM can add/drop all services and implement functions of a line terminal node. When the ZXMP M600 is configured as OTM equipment, the relation among the platforms is shown in Fig.

  • Page 25: Structure Of Network Management Software System

    Chapter 1 System Overview 1.2.2 Structure of Network Management Software System The ZXMP M600 adopts Unitrans ZXONM E300 element management system Unix/Windows (hereafter called ZXONM E300 for short) to implement software management. The ZXONM E300 supports such functions as fault management, performance management, security...
  • Page 26 ZXMP M600 (V1.0) Technical Manual Layer description 1) Equipment layer (MCU) The equipment layer supports the following functions: Monitoring the alarm and performance of the boards Receiving commands from the network management system Controlling a board to implement specific operations. 2) NE layer, the Agent in the EMS The NE layer supports the following functions: Managing a single NE...
  • Page 27 Chapter 1 System Overview The subnet management system sends the commands to the NE management system, which then send them to the NE. After the commands are executed, the NE sends responses to the subnet management system through the NE management system.

  • Page 28: System Features

    ZXMP M600 (V1.0) Technical Manual 1.3 System Features CWDM technique adopted to implement large-capacity transmission Through an ordinary G.652 fiber, the ZXMP M600 equipment can provide 8+1 channels and the rate of each channel can reach 2.5Gbit/s. Here, “+1” indicates the channel with a wavelength of 1310nm.
  • Page 29 Chapter 1 System Overview way and can be plugged/unplugged in a hot way. This makes the configuration flexible and the maintenance convenient. Providing a powerful and unique EMS The ZXONM E300 network management system adopted by the ZXMP M600 provides friendly and convenient user interfaces and supports the management of the NE layer, NE management layer and network management layer.

  • Page 30: Applicable Standards/Recommendations

    ZXMP M600 (V1.0) Technical Manual 1.4 Applicable Standards/Recommendations The design of the ZXMP M600 system conforms to the following recommendations and standards: ITU-T G.652-2003-3 Characteristics of a single-mode optical fibre cable ITU-T G.653-2003-12 Characteristics of a dispersion-shifted single-mode optical fibre cable ITU-T G.655-2003-3 Characterizations of a non-zero dispersion single-mode optical fibre cable...
  • Page 31 Chapter 1 System Overview ITU-T .957-1999-6 Optical interfaces for equipment and systems relating to the synchronous digital hierarchy ESCON phy layer OS390/LIBRARY IEC 60825-1-2000 Safety of Laser Product ISO/IEC-9314-3 Information processing systems-Fibre distributed Data Interface (FDDI)-Part 3: physical Layer Medium Dependent (PMD) Bellcore GR253-1999 Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria...

  • Page 33: Technical Indices

    2 Technical Indices This chapter introduces the technical indices of the ZXMP M600, including the structure indices, power indices and board performance indices. 2.1 System Indices 8+1 wavelength system compliance to S-C8L1-1D2/3/5 application code of G.695 4+1 wavelength system can upgrade to 8+1 system 20Gb/s Maximum capacity (8x2.5G) OTM and OADM nodes support P2P and ring topology 18dB link budget for 8+1 system w/o reg...

  • Page 34: Structure Indices

    2. The “H” and “W” in the outline dimensions of the boards indicate the size of the board panel, while “D” indicates a dimension of the PCB board. 3. For the detailed description of the component parts, please see Unitrans ZXMP M600 (V1.0) Metro CWDM Equipment Hardware Manual...

  • Page 35: Power Indices

    Chapter 2 Technical Indices 2.3 Power Indices 2.3.1 Voltage Requirements The ZXMP M600 supports DC power supplies. Compliance to ETSI EN 300 132-2 V2.1.2 (2003-09) DC power Rated input voltage: -48V Fluctuation allowance: -57V~-40V Rated input voltage: +24V Fluctuation allowance: +20V~+30V Rated input voltage: -60V Fluctuation allowance: -75V~-45V 2.3.2 Power Consumption Requirements...

  • Page 36: Environment Requirements

    ZXMP M600 (V1.0) Technical Manual operation of the equipment. Therefore, the practical power consumption should be 1.5~1.8 times of that under normal temperature. 2.4 Environment Requirements 2.4.1 Grounding Requirements Equipment internal grounding requirements 1) The board should be in reliable contact with the shell of the equipment through the captive screw on the panel.

  • Page 37: Cleanness Requirements

    Chapter 2 Technical Indices Table 2.4-1 Temperature and Humidity Requirements Item Requirements Environment temperature 0°C~+45°C Transportation and storage temperature -20°C~ +60°C Relative humidity 10%~90% (35°C) 2.4.3 Cleanness Requirements The cleanness requirements involve dust and corrosive gas in the air. The equipment should work in an equipment room that meets the following cleanness requirements: There should be no explosive, conductive, magnetic-conductive or corrosive dust in the transmission equipment room.

  • Page 38: Reliability

    ZXMP M600 (V1.0) Technical Manual When ordinary fibers are adopted, the common working wavelengths of the ZXMP M600 are 8+1 wavelengths, and the wavelength interval is 20nm. “+1” indicates to add a channel for the 1310nm window. The distribution of the wavelengths is shown in Table 2.5-1.

  • Page 39: Indices Of System Component Parts

    Chapter 2 Technical Indices All the laser modules in the equipment comply with the requirements of IEC 60825-1:1994+A2:2001 and IEC 60825-2:2000. Reproduction of all warning labels. 2.8 Indices of System Component Parts 2.8.1 Performance Indices of OMD OMDs used in the ZXMP M600 equipments include OMD5-1, OMD4-1 and OMD4-5. The figures before “-”...

  • Page 40: Performance Indices Of Oad Units

    ZXMP M600 (V1.0) Technical Manual OMD5-1+OMD4-5: multiplexing/ demultiplexing 8+1 wavelengths. “+1” indicates the 1310 channel. Take common 4+1 and 8+1 wavelengths for example. The major performance indices of the ZXMP M600 OMD units are as shown in Table 2.8-1. Table 2.8-1 Performance Indices of OMD Parameter Unit 4+1 Wavelengths...

  • Page 41: Table 2.8-2 Performance Indices Of Oad Units

    Chapter 2 Technical Indices line optical interface and the channel optical interface at the B side; /I indicates input while /O indicates output. For example, “A Line/O” indicates the output line optical interface at the A side. The major performance indices of the OAD units are shown in Table 2.8-2. Table 2.8-2 Performance Indices of OAD Units Parameter Unit...

  • Page 42: Otu Interface Indices

    ZXMP M600 (V1.0) Technical Manual 2.8.3 OTU Interface Indices The OTU module used in the ZXMP M600 includes a line optical transmitting module, line end optical receiving module and client optical transceiving module. Indices of the line end optical transmitting port The Indices of the line end optical transmitting port are shown in Table 2.8-3.

  • Page 43: Table 2.8-4 Indices Of The Line End Optical Receiving Port

    Chapter 2 Technical Indices Indices of the line end optical receiving port The Indices of the line end optical receiving port are shown in Table 2.8-4. Table 2.8-4 Indices of the Line End Optical Receiving Port R Point Parameters at the Optical Input End Unit Indices Optical signal rate (multiple rates)

  • Page 44: Table 2.8-5 Indices Of Client Optical Transceiving Module

    ZXMP M600 (V1.0) Technical Manual Indices of client optical transceiving module When STM-1/4/16 signals are transceived at the client, the optical indices conform to ITU-T Recommendation G.957; when GE signals are transceived, the optical indices conform to IEEE802.3, as shown in Table 2.8-5. Table 2.8-5 Indices of Client Optical Transceiving Module Unit STM-16I-16.1...

  • Page 45: Performance Indices Of Optical Supervisor Channel

    Chapter 2 Technical Indices 2.8.4 Performance Indices of Optical Supervisor Channel The optical monitoring channel of the ZXMP M600 is implemented on the NCP board. Its major performance indices are shown in Table 2.8-6. Table 2.8-6 Major Performance Indices of Optical Monitoring Channel Central Wavelength (nm) 1310±50 1511±6.5...
  • Page 46 ZXMP M600 (V1.0) Technical Manual Indices of client optical transceiving module When STM-1/4 signals are transceived at the client, the optical indices conform to ITU-T Recommendation G.957; as shown in Table 2.8-7 Table 2.8-7 Indices of Client Optical Transceiving Module Unit STM-1 S-1.1 STM-4 S-4.1...

  • Page 47: System Function

    3 System Function This chapter deals with the functions of the ZXMP M600 equipment, including the transmission function, service access capability, communication monitoring function, power input/output function, grounding function and protection function. 3.1 Line Transmission Function The ZXMP M600 is suitable for large-capacity optical transmission. When ordinary fibers are used, the maximum number of working wavelengths of the system reaches 8+1 (“+1”...

  • Page 48: Service Functions

    ZXMP M600 (V1.0) Technical Manual 3.2 Service Functions 3.2.1 Service Access Function The ZXMP M600 can access the following services: SDH service, including STM-1/4/16 service SONET service, including OC-3/12/48 service ATM service or POS service; the latter including VC4, VC4-4c and VC4-16c Ethernet service, including GbE 3.2.2 Service Convergence Function The ZXMP M600 can multiplex (converge) and demultiplex low rate signals.

  • Page 49: Communication And Monitoring Functions

    An optical channel consists of CWDM nodes. Though the CWDM nodes, logic connection is set up between the SDH nodes. If the CWDM equipment has not adopted 1310 or 1510 wavelength to transmit the monitoring information, then the DCC channel of the ZTE SDH equipment can be used for monitoring.

  • Page 50: Fig. 3.3-2 Connection With The Ems Through Sdh Equipment

    ZXMP M600 (V1.0) Technical Manual The connection between the CWDM/ SDH nodes and the EMS is described below: 1) For the CWDM equipment that does not serve as an element management access node, its ETH1 or ETH2 interface on the NCP board of can be connected with the Ethernet interface of the SDH equipment.

  • Page 51: Communication Between Nodes

    Chapter 3 System Function In Fig. 3.3-2, the data between CWDM node 3 that serves as a non-access node and the EMS is taken as an example to describe the data report flow. Here, the report from CWDM node 3 is transferred to the aggregate overhead of the SDH equipment through the Ethernet interface of SDH node 3.

  • Page 52: Intra-Node Communication And Monitoring

    ZXMP M600 (V1.0) Technical Manual monitoring channel is of the 100BASE-FX type and the wavelength can be either 1310nm or 1510nm. 3.3.3 Intra-node Communication and Monitoring The ZXMP M600 equipment can add/drop and multiplex multiple wavelengths through the combination of master CWU+ slave CWU or master CWU+slave CWU+ SMU. In this case, the inter-node communication and monitoring information is implemented through the NCP board on the master CWU shelf, while the communication and monitoring information between different shelves in the same node is implemented...

  • Page 53: Power Input And Output Functions

    Chapter 3 System Function 3.4 Power Input and Output Functions Power Input The ZXMP M600 supports DC input. The voltage of DC power is –48V, +24V or –60V. Two DC power boards can be configured to implement 1+1 hot backup. In addition, the ZXMP M600 supports input over-voltage and over-current protection as well as the reverse connection protection of DC input.

  • Page 54: Protection Function

    ZXMP M600 (V1.0) Technical Manual 3.7 Protection Function The protection function of the ZXMP M600 supports 1+1 channel protection based on the ring network. 3.7.1 Ring Network Protection Ring network protection in the ZXMP M600 indicates channel 1+1 protection. It is implemented by an OTU with the protection function.

  • Page 55: System Configurations And Networking Modes

    4 System Configurations and Networking Modes This chapter deals with the system configurations and networking modes of the ZXMP M600 and illustrates the application of the ZXMP M600 through a configuration example. 4.1 System Configuration 4.1.1 Board Slot Resources The ZXMP M600 equipment includes a CWU shelf and SMU shelf. The board slot resources of the two shelves are respectively described below.

  • Page 56: Metro Optical Terminal Equipment (Otm)

    ZXMP M600 (V1.0) Technical Manual 4.1.1.2 SMU Shelf The distribution of the slots in the SMU shelf is shown in Fig. 4.1-2. The figures here indicate the slot numbers. PCW ② SRM42/GEM2 ③ PCW ① Fig. 4.1-2 Slot Distribution in the SMU Shelf The relation between the boards and the slots is shown in Table 4.1-2.

  • Page 57: Fig. 4.1-4 Fiber Connection Of Otm Equipment (1310Nm Monitoring Channel)

    Chapter 4 System Configurations and Networking Modes Master CWU OTU1 LINE IN OM D5-1 LINE OUT OTU2 OTU3 OM D4-5 OTU4 Slave CWU CH1~CH8: optical interface of multiplexing/ demultiplexing channel on OMD board, CH1=1471nm, interval=20nm CH0: 1310nm monitor channel interface on OMD5-1, which is connected to the OSC interface of the NCP board UPG: upgrade interface of OMD board LINE IN/LINE OUT : optical line input/ output interface of OMD board...

  • Page 58: Metro Oadm Equipment (Oadm)

    ZXMP M600 (V1.0) Technical Manual 4.1.3 Metro OADM Equipment (OADM) OADM is used as a node in the middle of the line to add/drop some services. Other services are directly connected. The functional structure of OADM is shown in Fig. 1.2-3.

  • Page 59: Networking Mode

    Chapter 4 System Configurations and Networking Modes If the 1310nm monitoring channel is not used, as shown in Fig. 4.1-6, the 1310 nm channel can be used as a service add/drop channel. To add/drop 1 wavelength, use OAD1; to add/drop 2 wavelengths, use OAD2; to add/drop 3 wavelengths, use OAD3 as shown in Fig.

  • Page 60: Chain Networking

    ZXMP M600 (V1.0) Technical Manual 4.2.2 Chain Networking The application of chain networking is shown in Fig. 4.2-2. O TM O AD M O TM Fig. 4.2-2 Application of Chain Networking 4.2.3 Ring Networking The application of ring networking is shown in Fig. 4.2-3. O AD M O AD M O AD M...

  • Page 61: Configuration Example

    Chapter 4 System Configurations and Networking Modes 4.3 Configuration Example In the following, a typical configuration example will be introduced, in which the OADM is used for networking. The network topology is a two-fiber bidirectional ring network, as shown in Fig. 4.3-1. 20km 15km 18km...

  • Page 62: Configuration Implementation

    ZXMP M600 (V1.0) Technical Manual 8+1 wave 2+1 wave 2+1 wave 2+1 wave 2+1 wave Add/drop Add/drop Add/drop 15km Add/drop 18km Add/drop 20km Node: 1311 window 1471(1) 1491(2) 1511(3) 1531(4) 1551(5) 2xGE 2xGE 4x622M 1571(6) 4x622M 1591(7) 1611(8) Integrated access without OTU Legend: Configure OTU Configure OTUP (with protected OUT;...
  • Page 63 Chapter 4 System Configurations and Networking Modes OMD board To add/drop 8+1 wavelengths at Node A, OMD5-1 and OMD4-5 boards should be used together. Two OMD5-1 boards should be configured to implement transceiving in two optical line directions. OAD board OAD3 boards should be configured to add/drop 2+1 wavelengths at Nodes B, C, D and E, to directly connect 2 wavelengths at Nodes B, C and D, and to directly connect 6 wavelengths at Node E.

  • Page 64: Application Features

    ZXMP M600 (V1.0) Technical Manual 4.3.1.2 Equipment Configuration Based on the service requirements as shown in Fig. 4.3-2, the configurations of the nodes are shown in Table 4.3-1. Table 4.3-1 Equipment Configuration Configuration Quantity Configuration Type CWU shelf SMU shelf ——...

  • Page 65: Appendix A Term Description

    Appendix A Term Description A.1 G.652 Optical Fiber G.652 single-mode optical fiber can be applied to 1300nm and 1550 wavelengths. When it is applied to 1300nm wavelength, the dispersion is about zero. Therefore, it is the optimum single-mode optical fiber. The nominal value of the mode field diameter of G652 single-mode fiber is between 9 µm ~10 µm (the mode field diameter is a parameter unique to single-mode fibers;...
  • Page 66 ZXMP M600 (V1.0) Technical Manual G.652A and G.652 B single-mode optical fibers, that is, the ordinary fibers mentioned above have a large dispersion at 1530nm~1565nm of Band C and 1565nm~1625nm of Band L, which is generally 17ps/nm·km~22ps/nm·km. When the system rate is 2.5Gbit/s or higher, dispersion compensation is required. G.652A and G.652 B fibers are widely applied in transmission networks at present.
  • Page 67 ....Appendix A Term Description A.3 Working Wavelength The working principle of WDM is to multiplex multiple optical channel signals into one fiber for transmission and implement the reverse process. Therefore, to allocate channels efficiently in a limited wavelength area, improve the bandwidth utility and reduce the non-linear effects between adjacent channels, the working wavelengths of the multiplex optical channel signals should be specified strictly.
  • Page 68 ZXMP M600 (V1.0) Technical Manual A.4 Channel Interval It refers to the nominal frequency difference (wavelength interval) between two adjacent multiplex channels. Channel intervals can be either even or uneven. Uneven channel intervals can be used to suppress the Four Wave Mixing (FWM) effect of G.653 fiber. At present, however, even channel intervals are used in most cases.
  • Page 69 ....Appendix A Term Description A.6 Channel Bandwidth It is a parameter of a demultiplexer. A demultiplexer includes two kinds of bandwidth: channel bandwidth @-0.5dB and channel bandwidth @-20dB. They respectively indicate the change value of the corresponding working wavelength when the insertion loss of the demultiplexer decreases for 0.5dB and 20dB.
  • Page 70 ZXMP M600 (V1.0) Technical Manual A.8 Isolation It is a parameter of the demultiplexer and indicates the separation of the multiplex optical channel signals from the demultiplexer. The higher the channel isolation is, the better the frequency selection performance of the WDM equipment. Consequently, the crosstalk suppression ratio becomes higher and the mutual interference between multiplex optical channels becomes lower.

  • Page 71: Fig. A.9-1 Optical Transmission Over Interface Made Of Uneven Media

    ....Appendix A Term Description A.9 Reflection Concept When light is transmitted over an interface made of different media, it will be reflected and refracted. If the interface is made of uneven media, the reflection (dispersion) will be very complicated and may exist on different levels. In the optical channel, it is in the form of reversely transmitted wave, that is, reflection, which is shown in Fig.
  • Page 72 ZXMP M600 (V1.0) Technical Manual The Rayleigh reflection exerts least influence, while Stokes reflection only occurs at the excitation threshold. Influence on the system Large reflection may seriously affect the transmission system and produce bit error, delay and pulse expansion in the signals. If the reflection produces noise, it will lower the signal-noise ratio and affect the normal operation of the system.
  • Page 73 ....Appendix A Term Description A.13 Maximum -20dB Bandwidth Maximum -20dB bandwidth is a parameter of a Single Longitudinal Mode (SLM) laser, the unit being nm. It indicates the optical bandwidth when the peak wavelength decreases for 20dB A.14 Dispersion Tolerance Dispersion is a transmission property of optical fibers.

  • Page 75: Appendix B Abbreviations

    Appendix B Abbreviations Absolute Frequency Reference AGENT Alarm Indication Signal Amplified Spontaneous Emission Bit Error Ratio Clock and Data Recovery Code Mark Inversion Center Process Unit Cyclic Redundancy Check CWDM Coarse Wavelength Division Multiplexing CWDM Unit DBMS Database Management System Data Communications Channel Data Communications Network Double Defect Indication...
  • Page 76 ZXMP M600 (V1.0) Technical Manual Multiplex Section Protection Multiplex Section Termination MSTP Multi-Service Transport Platform MTBF Mean Time Between Failure Net Control Processor Network Element Network Node Interface NMCC Network Manage Control Center Non Return to Zero Network Termination Optical Add/Drop Unit OADM Optical Add/Drop Multiplexer Optical Channel...

Table of Contents