Huawei OSN1500 2500 3500 7500 2-port STM-4 622M optical interface board SSN1SLD4A12 equipped with 2 L-4.2 80km SFP module

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PN: 03053176 Category:
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2xSTM-4 Optical Interface Board(L-4.2,LC).

Substitute for SSN1SLD4(L-4.2,LC).

Apply to Huawei OSN 1500B, OSN 2500, OSN 3500, OSN 7500 to transmit and receive 2xSTM-4 optical signals, at 40~80km.

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

Supports ALS function. The optical interface supports 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 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.

Supports inloops and outloops 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.


SSN1SLD4A(L-4.2,LC) is a 2-ports STM-4 optical interface board, can be used on Huawei OSN1500B, OSN2500, OSN3500, OSN7500. SSN1SLD4A(L-4.2,LC) part number is 03053176, model name is SSN1SLD4A12. SSN1SLD4A(L-4.2,LC) comes with 2 units L-4.2 SFP module, transmission distance is 80km. SFP module is swappable to perform different transmission distance.

Tech Specs
Front Panel
The front panel of the SSN1SLD4A(L-4.2,LC) has indicators, interfaces, a bar code, and a laser safety class label.


Valid Slot
OSN 1500B: When the cross-connect borad is CXLN, the SSN1SLD4A(L-4.2,LC) can be installed in slots 11–13.

OSN 2500: When the cross-connect boards are CXLN and CXLLN, the SSN1SLD4A(L-4.2,LC) can be installed in slots 5–8 and 11–13.

OSN 3500: When the cross-connect boards are IXCS and SXCA, the SSN1SLD4A(L-4.2,LC) can be installed in slots 1–8 and 11–17.

OSN 7500: The SSN1SLD4A(L-4.2,LC) can be installed in slots 1–8, 11–18, and 26–31.

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 SSN1SLD4A(L-4.2,LC) indicates the type of optical interface.
Board Feature Code Type of Optical Interface
SSN1SLD4A12 12 L-4.2
Optical Interface Parameter
Parameter Value
Nominal bit rate 622080 kbit/s
Line code pattern NRZ
Application code L-4.2
Transmission distance (km) 40 to 80
Type of fiber Single-mode LC
Operating wavelength range (nm) 1480 to 1580
Launched optical power range (dBm) -3 to +2
Receiver sensitivity (dBm) -28
Minimum overload (dBm) -8
Minimum extinction ratio (dB) 10
Maximum -20 dB spectral width (nm) 1
Minimum side mode suppression ratio (dB) 30
Mechanical Specifications
Dimensions (mm) 25.4 (W) x 235.2 (D) x 261.4 (H)
Weight (kg) 0.6
Additional information
Weight 3.0 kg
Dimensions 37.5 × 34.0 × 7.5 cm



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Q: How many versions does the SLD4A have?

A: The SLD4A is available in one functional version, namely, N1.


Q: What is the board substitution?

A: N1SLD4 and the N1SLD4A can substitute each other.


Q: What is the difference between different function codes?


Board Feature Code Optical Interface Transmission Distance(km)
SSN1SLD4A10 10 S-4.1 15
SSN1SLD4A11 11 L-4.1 40
SSN1SLD4A12 12 L-4.2 80
SSN1SLD4A13 13 Ve-4.2 100
SSN1SLD4A14 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 SSN1SLD4A(L-4.2,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 SSN1SLD4A(L-4.2,LC) board?

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

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