The functional version of the Huawei OSN3500 SSN1SLD4A single board is N1, and the N1SLD4 and N1SLD4A can replace each other. Receives and transmits two STM-4 optical signals, and processes two STM-4 standard services or cascade services. Support optical module information detection and query. Supports the use and monitoring of SFP pluggable optical modules, facilitates the maintenance and upgrade of optical modules, supports VC-12/VC-3/VC-4 services and VC-4-4c cascade services. Supports segment overhead processing of STM-4 signals. Supports setting and querying of J0/J1/C2 bytes. Supports MSP and SNCP shared optical path protection. Provides 4 sets of K-byte processing capability, single optical port can support 2 MSP rings, 1 SLD4A board can support up to 4 MSP rings.

Relationship between Huawei OSN3500 SSN1SL4A single-board feature codes and optical interface types

Single-board	Feature Code	Optical interface type
SSN1SL4A10	10	S-4.1
SSN1SL4A11	11	L-4.1
SSN1SL4A12	12	L-4.2
SSN1SL4A13	13	Ve-4.2
SSN1SL4A14	14	I-4
SSN1SL4A15	15	S-4.1
SSN1SL4A16	16	L-4.1
SSN1SL4A17	17	L-4.2
SSN1SL4A18	18	Ve-4.2
SSN1SL4A19	19	I-4
SSN1SL4A20	20	S-4.1
SSN1SL4A21	21	L-4.1
SSN1SL4A22	22	L-4.2
SSN1SL4A23	23	Ve-4.2

Huawei SSN1SL4A Optical Interface Board Features

Supports inner loopback and outer loopback functions at the optical interface level.

Supports VC-4 channel inner loopback and outer loopback functions.

Support soft reset and hard reset, soft reset does not affect the service.

Support the query function of veneer manufacturing information.

Support FPGA online loading function.

Support smooth upgrade of single board software.

Support one-click data acquisition.

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