ZTE ZXMP S390
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ZXMP S390 is the STM-64 level multi-function Broadband Node Equipment newly introduced by ZTE, which can provide high-speed, large capacity information transmission, and is adaptive to the requirement of backbone networks, local networks, and Metropolitan Area Networks now and in the future.
Based on a modular design, ZXMP S390 can fulfill the functions of different systems such as TM, ADM，MADM and REG without changing hardware system. The TM and REG systems can be smoothly upgraded to ADM.
The protection capabilities of the hardware and network-level greatly enhance the reliability and stability of the system.
Overhead-Byte Usage List
|Overhead type||Overhead name||S390 application|
|A1, A2||Frame position indication for regeneration section, A1:11110110,A2:00101000|
|J0||Used for regeneration section trace. It may be set.|
|D1~D12||Transport the management information with D1~D3|
|E1, E2||The orderwire connection path for voice communication;|
E1 for regeneration section access, E2 for MS terminal
|F1||Used for special maintenance purpose supplying temporary data/audio path connection, and providing 64K
co-directional data interface
|B1||Used for the error code monitor of the regeneration section|
|B2||Used for the error code monitor of MS|
|K1, K2||Used for the auto-protection switchover (APS) command of MS|
|S1||b5~b8 used for synchronous status message|
|M1||Used for MS far-end difference indication|
|AU pointer||AU PTR||The rate adjustment on AU level|
|J1||Used for high-order path trace, able to be set|
|B3||Used for path error code monitoring|
|C2||Used for expressing the composition or maintenance
status of VC-3／VC-4／VC-4X, able to read and write
|G1||Used for returning the status and performance of path terminal to the path origin of VC3/VC4/VC4XC|
|F2, F3||Not applying|
|H4||Affording the general position indication to payload, as well as the special payload Position (i.e. H4 may be the multi-frame position indication of VC12 and VC2); and
performing VC3/VC4 virtual concatenation
|V5||Providing the functions of error code test, signal mark and channel status for VC1/VC2|
|J2||VC1, VC2 path trace byte, able to be set|
|K4||Used for the virtual concatenation process of low-order path|
ECC uses the D1~D3 (DCCr) or D4~D12 (DCCm). S390 could support 48 DCC directions. DCCr are supported by any optical interface. DCCr + DCCm are supported by 2.5G and 10G optical interface.