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ZXONE 8500 supports 160amp 192 × 10G or 80amp 96 × 40G system, which is mainly used in long-distance backbone network transmission.

1.1 Technical characteristics
1.1.1 forward error correction (FEC/AFEC)
ZXONE 8500 adopts the function of forwarding error correction, which can enhance the fault tolerance of the transmitted signal, reduce the requirement of the signal-to-noise ratio of the system, and prolong the transmission distance. This feature includes normal FEC and super FEC (AFEC).
The ordinary FEC: frame structure conforms to the G.709 standard. In the 10 G system, the rate of STM-64 service after coding is 10.709 Gbit, the rate of 10 GE service coding is 11.1 Gbit/s;2.5 G system, and the rate after coding is 2.66 Gbit/s. The equivalent improvement of the optical signal-to-noise ratio is about 5 dB~6 dB.
The frame structure of AFEC: super-strong FEC, conforms to the G.975 standard, and the improved algorithm is used in FEC coding and decoding. In the 10G system, the rate after STM-64 service coding is 10.709 Gbit/s,10GE, and the rate after coding is 11.1Gbit/s. The optical signal-to-noise ratio (OSNR) is improved by 7 dB~9 dB. This type is not supported on 2.5 G systems.

1.1.2 automatic optical power off / reduction
With the cooperation of network management software, ZXONE 8500 supports two automatic power management functions: automatic power off (APSD) and automatic optical power reduction (APR). When a detection board with an optical performance detection function (such as an OPM board) detects no light in the line input, the detection board sends a notification message to the APSF controller. The APSF controller will control when it receives the message.
The system executes the veneer (such as EOA board) to automatically reduce the power or turn off the power automatically. In this way, the accident of laser damage to human eyes is prevented. When the fault is restored, the system can recover automatically (or manually).

1.1.3 Erbium-doped fiber amplification technology (EDFA)
ZXONE 8500 adopts EDFA technology to improve the transmission distance of the system without a power relay. EDFA technology replaces the traditional optical-electrical-optical relay mode and realizes the simultaneous amplification of multiple optical signals in an optical fiber, which greatly reduces the cost of the optical relay. At the same time, it can achieve good coupling with the transmission fiber and has the advantages of high gain, low noise, large bandwidth, high output power, high pump efficiency, low insertion loss, and insensitive to polarization.
SJ-20100903084047-002 | 2011-11-09 (R1.5) 1-1.

Product description of ZXONE 8500 Intelligent Optical Transport platform
1.1.4 Raman amplification technology
In the ultra-long-distance transmission DWDM system, the simple use of EDFA technology for amplification will produce the accumulation of spontaneous emission and limit the overall performance of the system. ZXONE 8500 adopts distributed RAMAN amplifier board (DRA), through the combination of EDFA+DRA technology (that is, the combination of EOA board and DRA board), which can effectively improve the optical amplification performance of the ultra-long transmission system.

1.1.5 Hub ROADM
ZXONE 8500 can provide intelligent hub-based ROADM that supports multi-directional and service broadcasting functions. This function is realized by the optical power distribution unit (PDU) and the wavelength selection unit (WSU). Hub ROADM increases the flexibility of WDM network and enables operators to dynamically control the path of wavelength transmission remotely, which can effectively reduce operation and maintenance costs.

The functions of the Hub ROADM node are as follows:
Realize the wave level scheduling of wavelength signals in all directions.
It has the function of getting on and off the road locally.
Ten optical directional wavelength scheduling is supported.
Flexible configuration for different combinations of wavelength-dependent, direction-dependent to wavelength-independent, and direction-independent.

1.1.6 layer 2 switching function
ZXONE 8500 can provide Ethernet layer 2 switching and customer service performance testing. This feature is through A-type aggregation.
The switchboard (ASMA board) realizes the layer 2 switching function based on VLAN, which can realize the MAC address of the Ethernet frame.
Identification, multiple GE/10GE to 10GE bandwidth aggregation / de-aggregation functions, business QoS management, VLAN, and other functions.

1.1.7 centralized power crossover function
ZXONE 8500 centralized electric crossover completes any slot cross-scheduling of slotted frames on the backplane, and the slotted frames after scheduling.
Single or multiple groups are demultiplexed on the service board to restore the scheduled service. The centralized power crossover system is based on synchronous time division scheduling, which is beneficial to the large-scale scheduling system.

The characteristics of the centralized electrical crossover are as follows
The crossover capacity and access capacity are 3.2T.
Cross granularity: ODU0/ODU1/ODU2/ODU3.
The convergence transmission function of each access service to different wavelengths and different directions is realized.
Support GE/10GE, STM-16/64/256, FC1/2/4/8/10G extension, OTU1/2.
Cross-network features: cross-network is a non-blocking network, supporting broadcast and Ethernet clock transmission functions.

1.2 upgrade, maintenance feature
1.2.1 Master-slave subframe
ZXONE 8500 supports master-slave subshell configuration. One end of the equipment is equipped with only one master subframe, and the master subframe can have multiple followers.
Frame. A single master subframe can support cascading 15 slave subracks.
1-2 SJ-20100903084047-002 | 2011-11-09 (R1.5).

Product characteristics
State clearly:
The main subframe refers to the subframe that has been equipped with the compact main control board (SNP), and the subframe refers to the subframe without the SNP board.
The SNP board is installed on the subframe 2, which is defined as the main subframe.

1.2.2 compatibility
ZXONE 8500 optical monitoring channel and electrical monitoring channel can be interconnected with the optical monitoring channel and electrical monitoring channel of ZXMP M720, ZXMP820, ZXWM M920 equipment.

1.2.3 smooth expansion and upgrade
ZXONE 8500 supports multi-subrack management capabilities and has the following smooth capacity expansion and upgrade capabilities:
In the system with mixed transmission of 40 Gbit/s service and 10 Gbit/s service and 2.5 Gbit/s service, the system that can be smoothly upgraded to 40 Gbit/s is supported.
In the system with 96-wave combined and split-wave architecture, the transmission system with less than 96 waves can be smoothly upgraded to 96 waves by adding an optical forwarding board and part of veneer.

1.2.4 online upgrade
ZXONE 8500 supports the following online upgrades:
Without interrupting the service, the online upgrade of the network management software and the embedded software of each veneer is realized.
The system can be upgraded to a maximum of 96 waves online.

1.2.5 pluggable optical module
For 40Gbit/s rate service (STM-256), the MSA300PIN optical module can be supported on the client-side and the line side.
For 10 Gbit/s rate service (STM-64/OC-192/10GE), hot-swappable optical modules XFP and MSA300pin optical modules are supported on the client-side and the line side.
For the optical interface of 2.5 Gbit/s and below, the client-side supports the hot-swappable optical module SFP. The pluggable optical module supports the detection of whether the optical module is in place. The use of this module makes the system configuration more flexible.