Huawei OSN1500B 2500 2-port STM-4 622M optical interface board SSR1SLD410 equipped with 2 S-4.1 15km SFP module

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2xSTM-4 Optical Interface Board(S-4.1,LC)

Apply to Huawei OSN 1500B, OSN 2500 to transmit and receive 2xSTM-4 optical signals, at 2~15km.

Supports the detection and query of the information about the optical module.

Supports ALS function. The optical interface supports the setting of the on/off state of a laser.

Supports usage and monitoring of SFP optical module, which facilitates maintenance and upgrading of optical module.

Supports the single-fiber bidirectional optical module

Supports the VC-12, VC-3, VC-4 services, and VC-4-4c concatenation services.

Supports the transparent transmission and termination of the path overheads.

Supports the setting and query of the J0, J1, and C2 bytes.

Supports one or two channels of ECC communication.

Supports two-fiber ring MSP, four-fiber ring MSP, linear MSP, SNCP, SNCTP, and SNCMP protection schemes.

Supports the fiber-shared MSP and SNCP and processes four sets of K bytes

Supports inloops and outloops at optical interfaces.

Support inloops on VC-4 paths.

Supports warm resets and cold resets. The warm reset does not affect services.

Supports the query of the manufacturing information of the board.

Supports the in-service loading of the FPGA.

Supports the upgrade of the board software without affecting services.

Supports the press-to-collect function in fault data collection.


SSR1SLD4(S-4.1,LC) is a 2-ports STM-4 optical interface board, can be used on Huawei OSN1500B, OSN2500. SSR1SLD4(S-4.1,LC) part number is 03050802, model name is SSR1SLD410. SSR1SLD4(S-4.1,LC) comes with 2 units S-4.1 SFP module, transmission distance is 15km. SFP module is swappable to perform different transmission distance.

Tech Specs
Front Panel
The front panel of the SSR1SLD4(S-4.1,LC) has indicators, interfaces and a bar code.


Valid Slot
OSN 1500B: SSR1SLD4(S-4.1,LC) can be installed in slots 1–3, 6–9, and 11–13.

OSN 2500: When cross-connect board is CXLN, SSR1SLD4(S-4.1,LC) can be installed in divided slots 5–7,19–21; when cross-connect board is CXLLN, SSR1SLD4(S-4.1,LC) can be installed in divided slots 5–7 and 19–21.

Feature Code
The number code that follows the board name in the bar code is the feature code of the board. The feature code of the SSR1SLD4(S-4.1,LC) indicates the type of optical interface.
Board Feature Code Type of Optical Interface
SSR1SLD410 10 S-4.1
Optical Interface Parameter
Parameter Value
Nominal bit rate 622080 kbit/s
Line code pattern NRZ
Application code S-4.1
Transmission distance (km) 2 to 15
Type of fiber Single-mode LC
Operating wavelength range (nm) 1274 to 1356
Launched optical power range (dBm) -15 to -8
Receiver sensitivity (dBm) -28
Minimum overload (dBm) -8
Minimum extinction ratio (dB) 8.2
Maximum -20 dB spectral width (nm)
Minimum side mode suppression ratio (dB)
Mechanical Specifications
Dimensions (mm) 25.4 (W) x 235.2 (D) x 261.4 (H)
Weight (kg) 0.5


Additional information
Weight 2.0 kg
Dimensions 18.7 × 34.0 × 7.5 cm



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Q: What’s the difference between different functional versions?

A: The SLD4 is available in three functional versions, namely, R1, N1, and N2. R1SLD4 is a 2xSTM-4 optical interface board, which is installed in a divided slot in a subrack. The N1SLD4 is no longer manufactured. The differences are as below:

N1 N2 R1
single-fiber bidirectional optical modules Supported Not supported Supported
AU-3 service processing Not supported Supported Not supported
loopbacks on VC-4 paths Supported Supported Supported
TCM function Not supported Supported Not supported
Others installed in full slot installed in full slot installed in divided slot


Q: What is the board substitution relation among different versions?

A: The versions cannot be substituted with each other.


Q: What is the difference between different function codes?


Board Feature Code Optical Interface Transmission Distance(km)
SSR1SLD410 10 S-4.1 15
SSR1SLD411 11 L-4.1 40
SSR1SLD412 12 L-4.2 80
SSR1SLD413 13 Ve-4.2 100
SSR1SLD414 14 I-4 2


Q: Can I change SFP module to reach longer transmission distance?

A: Yes, you can, please contact sales team, for available SFP module and cost.


Q: Can I equip different specification SFP module on different port, to perform different transmission distance for each port?

A: Yes, you can, but that not recommended.


Q: Can I use compatible SFP module on SSR1SLD4(S-4.1,LC) board?

A: Yes, you can, the board might generate alarm, but it won’t affect use.


Q: Can I return/exchange board if not compatible with my system?

A: Yes, please tell our sales team your system and main control board version, before your purchase.


Q: The board is new or refurbished?

A: Yes, it is original new, not been used.


Q: Do you sell SFP module separately?

A: Yes, we do.


Q: What is the lead time for SSR1SLD4(S-4.1,LC) board?

A: In normal condition is 5 days, better to confirm with our sales team before your purchase.


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