Product Technical Characteristics

1.1.1 Forward Error Correction Function (FEC/AFEC)

The ZXMP M820 adopts forward error correction function, which can enhance the fault tolerance of the transmitted signal, reduce the system's requirements for signal-to-noise ratio, and extend the transmission distance. This feature includes both regular FEC and ultra strong FEC (AFEC).

Ordinary FEC: The frame structure conforms to the G.709 standard. In a 10G system, the rate of STM-64 service encoding is

10.709Gbit/s, the encoded rate for 10 GE services is 11.1 Gbit/s; In a 2.5G system, the encoded rate is 2.66 Gbit/s. Equivalent improvement in signal-to-noise ratio of approximately 5 dB to 6 dB.

lAFEC： Super strong FEC, frame structure compliant with G.975 standard, FEC encoding and decoding using improved algorithms. In the 10G system, the encoded rate of STM-64 service is 10.709 Gbit/s, and the encoded rate of 10GE service is 11.1 Gbit/s. Equivalent improvement of signal-to-noise ratio from 7 dB to 9 dB. The 2.5G system does not support this type.

1.1.2 Automatic optical power shutdown/reduction

With the cooperation of network management software,The ZXMP M820 supports two automatic power management functions: Automatic Power Shutdown (APSD) and Automatic Optical Power Reduction (APR). When a detection board with optical performance detection function (such as OPM board) detects no light in the line input, the detection board will send a notification message to the APSF controller. After receiving the message, the APSF controller will control the execution board (such as EOA board) to automatically reduce power or automatically turn off power. This prevents accidents caused by laser damage to the human eye from occurring. After the fault is restored, the system can automatically (or manually) recover.

1.1.3 Erbium doped fiber amplifier technology (EDFA)

ZXMP M820 adopts EDFA technology to improve the transmission distance of the system without power relay. EDFA technology has replaced the traditional optical electric optical relay method, achieving simultaneous amplification of multiple optical signals in a single fiber, greatly reducing the cost of optical relay. At the same time, it can achieve good coupling with transmission fibers, with the advantages of high gain, low noise, large bandwidth, high output power, high pump efficiency, low insertion loss, and insensitivity to polarization state.

Product Description of ZXMP M820 Metropolitan Dense Wavelength Division Multiplexing Equipment

1.1.4 Raman amplification technology

In ultra long distance transmissionIn DWDM systems, simply using EDFA technology for amplification will result in the accumulation of spontaneous emissions, limiting the overall performance of the system. The ZXMP M820 adopts a distributed RAMAN amplifier board (DRA), which can effectively improve the optical amplification performance of ultra long transmission systems through the combination of EDFA+DRA technology (i.e. the combination of EOA board and DRA board).

1.1.5 HUB type ROADM

The ZXMP M820 can provide an intelligent HUB type ROADM that supports multi-directional and business broadcasting functions. This function is mainly achieved through optical power distribution units (PDUs) and wavelength selection units (WSUs). HUB type ROADM increases the flexibility of WDM networks, allowing operators to remotely and dynamically control the wavelength transmission path, effectively reducing operational and maintenance costs. The functions implemented by HUB type ROADM nodes are as follows:

Implement wavelength level scheduling of wavelength signals in various directions.

L has local on road and off road functions.

Supports wavelength scheduling in ten light directions.

Flexible configuration for different combinations of wavelength dependent, direction dependent to wavelength independent, and direction independent.

1.1.6 Layer 2 Switching Function

ZXMP M820 can provide Ethernet layer 2 switching and customer service performance testing functions. This function is mainly implemented through the A-type aggregation switch board (ASMA board), based on VLAN layer 2 switching function, which can realize MAC address recognition of Ethernet frames, bandwidth aggregation/de aggregation function from multiple GEs/10GE to 10GE, QoS management of services,

VLAN and other functions.

1.1.7 Electric Cross Function

The ZXMP M820 provides distributed and centralized cross functionality based on OTN, enabling flexible scheduling of GE/2.5G/10G services.

Centralized intersections include group units (such as SMUBL), intersection units (such as CSU), and branch units (such as

DSAC、SAUC、SMUBC）， The cross particle size is ODU1/2, with a single rack cross capacity of 360G.

Distributed crossover does not require crossover units. Business boards are connected through high-speed backplane buses, and with the cooperation of network management, non blocking crossover scheduling can be achieved between 4 business boards. The crossover particles are ODU0/1/2, and a single rack can achieve multiple sets of crossover, with each set having a capacity of 80G.

1 Product Features

1.2 Upgrading and Maintaining Features

1.2.1 Master slave sub frame

ZXMP M820 supports master-slave subrack configuration. One end of the device is only configured with one main sub rack, which can carry multiple sub racks. A single main sub rack can support cascading 31 sub racks.

explain:

The main chassis is equipped with a compact main control board（Subframe of SNP refers to a subframe without SNP board configuration. The SNP board can only be installed on subrack 2, which means subrack 2 is the main subrack.

1.2.2 Compatibility

The ZXMP M820 optical monitoring channel can be interconnected with the monitoring channels of ZXMP M720 and ZXWM M920 devices

Tong.

1.2.3 Smooth Expansion and Upgrade

ZXMP M820 supports multi rack management capability and has the following smooth expansion and upgrade capabilities:

In systems where 40 Gbit/s services are mixed with 10 Gbit/s services and 2.5 Gbit/s services, smooth upgrades to 40 Gbit/s systems are supported.

In the system configured with a 96 wave multiplexing and demultiplexing architecture, by adding optical forwarding boards and some single boards, the smooth upgrade of transmission systems below 96 waves to 96 waves can be achieved.

1.2.4 Online Upgrade

ZXMP M820 supports the following online upgrades:

Realize online upgrade of network management software and embedded software on various boards without interrupting business.

The system can be upgraded online to a maximum of 96 wave system.

1.2.5 Pluggable optical module

regarding40Gbit/s speed service (STM-256), customer side and line side can support optical module MSA300PIN; For 10 Gbit/s rate services (STM-64/OC-192/10GE), the customer side supports hot swappable optical module XFP,

Customer side and line side support optical modulesMSA300PIN； For optical interfaces with speeds of 2.5 Gbit/s and below, the customer side supports hot swappable optical module SFP. The pluggable optical module supports in place detection of the optical module. The use of this module makes system configuration more flexible.