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Brief Introduction
ZXWM M900, launched by ZTE Corporation, is DWDM equipment targeting long-haul backbone network applications. It features large capacity (1.92T), ultra long haul (over 5400km) and smooth upgradeability of 400G/480G-800G/960G-1920G. It also provides flexible and mature protection schemes.

Super-large-capacity transmission system
With a 192-wavelength system framework, the subsystem can perform modular capacity expansion, with transmission capacities of 400Gbit/s, 480Gbit/s, 800Gbit/s, 960Gbit/s and even to 1920Gbit/s available, addressing tomorrow’s escalating bandwidth requirements.

IWF (integrated wavelength feedback) patented technique
Combination of patented wavelength centralized monitoring technique and precise temperature control further guarantees the wavelength stability of 50GHz wavelength spacing system.

ZTE OTU adopts a high-precision algorithm and supports 50GHz-wavelength-spacing transmission. As a level 2 security mechanism, IWF offers wavelength drift monitoring function, performs automatic wavelength calibration, further guaranteeing wavelength stability of the 50GHz-wavelength-spacing system, enhancing system stability, and easing system maintenance.
RAC(receiver adaptive control) technique. With RAC (Receiver Adaptive Control), the receiver automatically selects the optimal level decision point to obtain the best system performance, boosting signal/noise ratio, tolerance of non-linearity and dispersion, and improving bit error performance of the DWDM system.

ERZ modulation technique
ZTE’s new code modulation mode enables better non-linearity tolerance and lower OSNR tolerance, with a narrow spectrum. In comparison to the CRZ technique, it supports narrower channel spacing, applicable to 80/160-wavelength DWDM system with 50GHz channel spacing and equivalent to increase the signal-to-noise ratio by 3~5dB.
In addition, ERZ can be used with AFEC to improve system performance.

Enhance optical amplification technique
Offer EONA enhanced optical amplification unit and support widely tunable gain, decreasing amplification unit types and eliminating the needs to change optical amplifier configuration when line changes; With built-in 21dB insertion loss, the optical amplification unit leads the industry in available system redundancy.

RPOA remote pumping technique realizing ultra-long single-hop transmission capability
The bidirectional remote pumping technique available vastly extends single-hop transmission distance, enabling a single hop system application over 350km in the existing network.

MUX/DMUX with a high level of integration and low power consumption
Unique 80-wavelength single-level mux/dmux architecture allows for 80-wavelength multiplexing/demultiplexing without OCI, enabling slot occupation and power consumption to be down by 20% and 50% respectively.

OSPF-based supervisory channel
Based on the OSPF protocol, it implements the auto-discovery of NEs, automatic route configuration and features good network scalability.
It automatically updates all routes when adding new nodes, plugs, and plays NE, eliminating the needs to configure the routing table manually; automatically and rapidly restores route when network topology changes, such as the occurrence of node failure.

Wavelength add/drop function
Designed with flexible mux/dmux architecture, ZXWM M900 enables an agile add/drop of 1-96 wavelengths. It supports fixed optical add/drop multiplexing (FOADM) and reconfigurable optical add/drop multiplexing (ROADM) functions.

APO (Auto Performance Optimization): secure and reliable optical power auto-balancing technique
Embedded sub-network-level performance optimization algorithm is used to automatically establish and retain the optimized status of system optical performance, as exemplified by OSNR, maintain optimal overall system performance, drive down maintenance cost and improve maintenance efficiency, applicable to WDM system with frequently changing fiber parameters.

Flexible and mature protection schemes
Provide a wide variety of protection modes: 1+1 path protection, 2-fiber bidirectional path shared protection, 2-fiber bidirectional multiplex section shared protection, subnet connection protection, equipment-side 1:16 OTU protection, 1+1 multiplex section protection. And ZTE’s innovative path shared protection technique vastly decreases protection wavelengths used, saving network construction cost.

Standard formulator
ZTE was appointed as the editor of ITU-T G. Raman (G.665), which was approved at the ITU-T SG15 meeting in Geneva in Dec. 2004;
ZTE was appointed as the editor of ITU-T G.adc-Adaptive Dispersion Compensators in May 2005;
WDM path shared wavelength protection was drafted in ITU-T G.808.2 according to ZTE proposal in May 2005.

Product specification
Sub-rack dimensions
577 (height)×482.6 (width)×269.5 (depth)
Power supply style
-48DC (-57V~ -40V)
Installation mode
ETSI-standardized cabinet installation, 19” cabinet installation
Power consumption in full configuration
OTM cabinet: 1849W; OLA cabinet: 564.5W; OADM cabinet: 1487W
Weight in full configuration
OTM, OLA, and OADM sub-racks: 40 kg
Environmental parameters
Working temperature: 0℃~45℃
Working humidity: 10%~90%
Storage temperature: -40℃~70℃