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ZXWM M800 is applicable to the large-capacity optical transmission. It can satisfy the networking and management requirements of users at different levels and can be used to construct local networks and metropolitan core networks of different scales. In addition to large capacity and multiple optical interfaces like DWDM equipment in the backbone network, ZXWM M800 has such features required in MAN as flexibility, expandability, multi-service access, and multiple protections. The system can multiplex 80 working wavelengths at most and the maximum transmission capacity can be up to 800Gb/s. The wavelength selection and interval are in strict compliance with some ITU-T recommendations. The system supports multiple networking topologies; the perimeter of the ring network can be 800kms, but the perimeter in the actual project can be up to 806kms.

Highlight Features
Large Capacity and Easy Upgrade
ZXWM M800 can provide 800Gbit/s transmission capacity, fully satisfying the ever-growing requirements on bandwidth. The system is designed with a modular structure and multi-rack management technology. By adding optical transfer subrack, various modules, and optical group multiplexer/demultiplexer, the less than 40 wavelength transmission system can be smoothly upgraded to 80-wavelength. Its scalability and expansibility can protect the user’s investment maximally.

Service Convergence Functions
This function combines multiple low-rate signals into a signal for transmission over one wavelength. It also implements the reverse procedure, separating a convergence signal to low-rate signals. The service convergence functions support the processing of various low-rate signals, such as SDH signals (STM-1/ STM-4/ STM-16), POS, GE (Gigabits Ethernet) signals, FC (Fiber Channel) signals, FICON (Fiber Connection) signals, ESCON (Enterprise System connection) signals, and DVB (Digital Video Broadcasting) signals.

Flexible Networking Modes
The functionality of ZXWM M800 can be changed from OTM to OLA to OADM by choosing a different combinations of functional modules, making it more flexible for complicated network topologies, such as chain, star, cross, tangent-ring, and mesh networks.

Wavelength Add/Drop Functions
The filters in the ZXWM M800 can be configured flexibly to implement the add/drop of 1 to 80 wavelengths. With this kind of design, the ZXWM M800 supports both the FOADM( Fixed OADM) and the ROADM( Reconfigurable OADM) functions. FOADM: This function is to implement the adding/dropping of fixed wavelengths.
ROADM: With this function, wavelengths to be added/dropped can be reconfigured. ZXMP M800 supports ROADM function based on WB, PLC, and WSS technologies.

Reliable Protection Functions
ZXWM M800 provides multiple and effective protection listed below:
· 1 +1 channel protection based on wavelength and sub-wavelength;
· 1 +1 Multiplexing Section protection based on wavelength and sub-wavelength;
· 1: N channel protection based on wavelength and sub-wavelength;
· two-fiber bidirectional channel shared protection based on wavelength and sub-wavelength;
· two-fiber bidirectional multiplexing section shared protection based on wavelength and sub-wavelength;
· 1 +1 backup for the power board, CSU board, and CA board;
When ZXMP M800 is configured as an OADM node on a ring network, route protection of channels can be accomplished.

Performance Monitoring
ZXWM M800 uses a board performance-monitoring unit to acquire board performance data, which can be viewed to accurately locate a fault via NMS.

Power Management
ZXWM M800 adopts cutting-edge power management technology to adjust and control the power and power spectrum at each point in the system.

Powerful NM
ZXONM E300, used by ZXWM M800, can manage CWDM, DWDM, and SDH equipment. It employs a three-layer C/S structure of GUI/Manager-DB/Agent. Due to flexible networking, it offers the remote NM and hierarchical NM, easily synchronizes the data of multi-NMS and active/standby NM, and actualizes the automatic and manual switching. With its ECC automatic function, the ECC route between NEs can be set up automatically without manual configuration. It supports the remote and online upgrades of NE software and board software, provides management at multiple layers, i.e. NE layer, NE management layer, and network management layer, and supports the fault management, performance management, security management, configuration management, maintenance management, and system management. It also provides the northbound interfaces, e.g. CORBA, Q3, SNMP, and MML, so as to access the higher-lever NM easily.

ZTE ZXWM M800 boards List:
OTU 2.5 Gb/s Optical transponder unit
OTUF 2.5 Gb/s Optical transponder unit with the FEC function
EOTU10G Enhanced 10Gb/s optical transponder unit with FEC/AFEC
SRM41 Sub-rate Mux Board
SRM42 Sub-rate Mux Board
GEM2 Gigabit Ethernet Multiplex Board
GEMF Gigabit Ethernet Multiplex Board with FEC function
GEM8 Eight Gigabit Ethernet Mux Board
FCA Fiber Channel Access
DSA Data Service Aggregation Board
DSAF Data Service Aggregation with FEC
OMU Optical multiplex unit
ODU Optical demultiplex unit
OCI Optical channel multiplex
Demultiplex interleaver board
OBM Broadband multiplex board
OGMD6C Optical group mux/demux board
EOBA Enhanced optical booster amplifier
EOLA Enhanced optical line amplifier
EOPA Enhanced Optical pre-amplifier
EONA Enhanced node amplifier
EOBAH Enhanced high power optical booster amplifier
DRA Distributed Raman amplifier
OAD8 Optical add/drop multiplex board
WBU Wavelength Blocking Unit
WSU Wavelength Selective Unit
OP Optical protection board
DOP Dual Optical Protection board
OPCS Optical protect for channel section
OPMS Optical protect for mux section
OPM Optical performance monitoring board
OSC Optical supervision channel board
OSCF Optical supervision channel board for Fast Ethernet
OHP Overhead processor
OHPF Overhead processor for Fast Ethernet
NCPF NE Control Processor
APSF Automatic Protection Switching board
SDM Supervision add/ drop multiplexer
LAC Line Attenuation Compensator
VMUX Variable attenuation MUX
CA Clock Assignment board
DSAE Data Service Aggregation Electrical Interface Board
SAU SDH Access Unit Board
CSU Cross-switch and Synchronous-clock Unit
SMU SDH Multiplex Unit

Network diagram configuration
ZXWM M800 Metro dense wavelength division multiplexing equipment through the optical terminal equipment, optical line amplification equipment and optical add-drop multiplexing equipment to meet a variety of functions of a variety of networking methods, the following describes a network from the optical add/ drop multiplexer, The network topology is a typical configuration example of a two-fiber bidirectional ring network.
The ZXWM M800 system supports a wide range of spanning hybrid networks. Taking into account the actual characteristics of the metropolitan area network, that is, different cities of different sizes, in the construction of local and metropolitan area network nodes will vary according to the actual situation, usually from a few kilometers to tens of kilometers, even hundreds of kilometers.
Figure 1 is a representative hybrid spanning network system. The system configuration is mainly composed of 6 OADM nodes in the ring network applications, including 20 km, 40 km, 80 km three different spans, the circumference of 220 km, while transmitting 2.5 Gbit/s and 10 Gbit/s.

Networking mode
The ZXWM M800 can meet various networking requirements by configuring multiple optical network units (OTMs), optical add/drop multiplexers (OADMs), and optical line equipment (OLA) to meet various networking requirements.