Huawei OSN7500 SSN3SLQ4 4xSTM-4 optical interface board


3-5 days

Shenzhen Warehouse

SKU: 2015032 Category:


SSN3SLQ4 overview

The SLQ4 is a line board. The SLQ4 can be used on the OptiX OSN equipment series to transmit and receive STM-4 optical signals. The SLQ4 converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SLQ4 converts the electrical signals sent from the cross-connect side into optical signals and transmits the optical signals.

The SLQ4 is available in two functional versions, namely, N1 and N2. The difference between the two versions is with regard to whether they support the TCM function and AU-3 services. The N1SLQ4 is no longer manufactured.

Functional versions The SLQ4 is available in two functional versions, namely, N1 and N2.
  • Specifications of optical modules: single-fiber bidirectional optical modules.
  • Service processing: AU-3 service processing.
  • Maintenance features: loopbacks on VC-4 paths and TCM function.
Substitution Through the board version replacement function, the N3SLQ41 can substitute for the N1SLQ4 and N2SLQ4 at the same line rate.
Relationship between the feature code of the SLQ4 and the type of optical interface
Board Feature Code Type of Optical Interface
SSN1SLQ410 and SSN2SLQ410 10 S-4.1
SSN1SLQ411 and SSN2SLQ411 11 L-4.1
SSN1SLQ412 and SSN2SLQ412 12 L-4.2
SSN1SLQ413 and SSN2SLQ413 13 Ve-4.2
SSN1SLQ414 and SSN2SLQ414 14 I-4


Specifications of the ports of the SLQ4
Port type Description
I-4 2 km STM-4 two-fiber bidrectional optical interfaces
S-4.1 15 km STM-4 two-fiber bidrectional optical interfaces
L-4.1 40 km STM-4 two-fiber bidrectional optical interfaces
L-4.2 80 km STM-4 two-fiber bidrectional optical interfaces
Ve-4.2 100 km STM-4 two-fiber bidrectional optical interfaces
Basic functions Transmits and receives 4xSTM-4 optical signals.
Specifications of the optical interface
  • Supports different types of standard optical interfaces, namely, the I-4, S-4.1, L-4.1, L-4.2, and Ve-4.2.
  • The characteristics of the optical interfaces of the I-4, S-4.1, L-4.1, and L-4.2 types comply with ITU-T G.957.
  • The characteristics of the optical interface of the Ve-4.2 type comply with the standards defined by Huawei.
Specifications of the optical module
  • Supports the detection and query of the information about the optical module.
  • Provides the ALS function. The optical interface supports the setting of the on/off state of a laser.
  • Supports the usage and monitoring of the SFP optical module, which facilitates the maintenance and upgrading of the optical module.
  • The N1SLQ4 supports the single-fiber bidirectional optical module, and the single-fiber bidirectional optical module does not support loopbacks at the optical interface by using fiber jumpers.
Service processing
  • Supports the VC-12 services, VC-3 services, VC-4 services, and VC-4-4c concatenation services.
  • The N2SLQ4 supports the AU-3 services.
Overhead processing
  • Processes the section overheads of the STM-4 signals.
  • Supports the transparent transmission and termination of the path overheads.
  • Supports the setting and query of the J0, J1, and C2 bytes.
  • Supports one to four channels of ECC communication.
Alarms and performance events Reports various alarms and performance events, which facilitates the management and maintenance of the equipment.
Protection schemes
Maintenance features
  • Supports inloops and outloops at optical interfaces.
  • The N1SLQ4 supports 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.
  • The N2SLQ4 supports the TCM function.
  • Supports the press-to-collect function in fault data collection.


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