OSN 3500 is a new-generation optical transmission system developed by Huawei. It adopts a unified switching architecture and can function as an MPLS/MPLS-TP-based packet device or a TDM device. When working with other devices of Huawei, OSN 3500 supports various networking modes, including the pure packet mode, hybrid networking (packet + TDM) mode, and pure TDM mode, achieving optimal processing for packet services and traditional SDH services. Thus, OSN 3500 efficiently transmits voice and data services over the same platform.
Version Description
The SLD4A is available in one functional version, namely, N1.
Through the board version replacement function, the N1SLD4 and the N1SLD4A can substitute each other.
The SLD4A is available in one functional version, namely, N1.
Through the board version replacement function, the N1SLD4 and the N1SLD4A can substitute each other.
Version Mapping
Board Start Version N1SLD4A V100R008C01
| Board | Start Version |
|---|---|
| N1SLD4A | V100R008C01 |
Board Updates
This section describes the hardware updates in V200R013C30 and later versions as well as the reasons for the updates. Any product versions that are not listed in the document means that they have no hardware updates.
This section describes the hardware updates in V200R013C30 and later versions as well as the reasons for the updates. Any product versions that are not listed in the document means that they have no hardware updates.
Application
The SLD4A is a line board. The SLD4A can be used on the OptiX OSN equipment series to transmit and receive STM-4 optical signals. The SLD4A converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SLD4A converts the electrical signals sent from the cross-connect side into optical signals and transmits the optical signals.
The SLD4A is a line board. The SLD4A can be used on the OptiX OSN equipment series to transmit and receive STM-4 optical signals. The SLD4A converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SLD4A converts the electrical signals sent from the cross-connect side into optical signals and transmits the optical signals.
Functions and Features
The SLD4A transmits and receives STM-4 optical signals, performs O/E conversion for the STM-4 optical signals, extracts and inserts overhead bytes, and generates alarm signals on the line.
Table 1 provides the functions and features of the SLD4A.
Table 1 Functions and features of the SLD4A
Function and Feature SLD4A Basic functions Receives and transmits 2xSTM-4 optical signals, and processes 2xSTM-4 standard or concatenation services. 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.
Service processing Supports the VC-12 services, VC-3 services, VC-4 services, and VC-4-4c concatenation 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 or two 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
- Supports the Two-fiber ring MSP, Four-fiber ring MSP, Linear MSP, SNCP, SNCTP, and SNCMP.
- Supports the fiber-shared MSP and SNCP. One SLD4A supports a maximum of 2 MSP protection rings.
Maintenance features
- 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.
- Hot board swapping.
The SLD4A transmits and receives STM-4 optical signals, performs O/E conversion for the STM-4 optical signals, extracts and inserts overhead bytes, and generates alarm signals on the line.
Table 1 provides the functions and features of the SLD4A.
| Function and Feature | SLD4A |
|---|---|
| Basic functions | Receives and transmits 2xSTM-4 optical signals, and processes 2xSTM-4 standard or concatenation services. |
| Specifications of the optical interface |
|
| Specifications of the optical module |
|
| Service processing | Supports the VC-12 services, VC-3 services, VC-4 services, and VC-4-4c concatenation services. |
| Overhead processing |
|
| Alarms and performance events | Reports various alarms and performance events, which facilitates the management and maintenance of the equipment. |
| Protection schemes |
|
| Maintenance features |
|
Working Principle and Signal Flow
The SLD4A consists of the O/E converting module, CDR module, SDH overhead processing module, logic and control module, and power module.
Figure 1 shows the functional block diagram of the SLD4A.
Figure 1 Functional block diagram of the SLD4A
PLL: phase-locked loop SPI: SDH physical interface SDH: synchronous digital hierarchy RST: regenerator section termination MST: multiplex section termination MSA: multiplex section adaptation HPT: higher order path termination IIC: inter-integrated circuit CDR: clock and data recovery
The functional modules of the STM-4 units are described as follows:
The SLD4A consists of the O/E converting module, CDR module, SDH overhead processing module, logic and control module, and power module.
Figure 1 shows the functional block diagram of the SLD4A.
Figure 1 Functional block diagram of the SLD4A
| PLL: phase-locked loop | SPI: SDH physical interface | SDH: synchronous digital hierarchy |
| RST: regenerator section termination | MST: multiplex section termination | MSA: multiplex section adaptation |
| HPT: higher order path termination | IIC: inter-integrated circuit | CDR: clock and data recovery |
The functional modules of the STM-4 units are described as follows:
O/E Converting Module
- Converts the received optical signals into electrical signals, in the receive direction.
- Converts the electrical signals into SDH optical signals, and then sends the SDH optical signals to fibers for transmission, in the transmit direction.
- The SPI detects the R_LOS alarm and provides the laser shut down function.
- Converts the received optical signals into electrical signals, in the receive direction.
- Converts the electrical signals into SDH optical signals, and then sends the SDH optical signals to fibers for transmission, in the transmit direction.
- The SPI detects the R_LOS alarm and provides the laser shut down function.
CDR Module
This module restores the clock signal.
This module restores the clock signal.
SDH Overhead Processing Module
this module includes the RST, MST, MSA, and HPT sub-modules. This module provides the inloop and outloop functions.
- RST sub-module
- In the receive direction, the RST sub-module terminates the regenerator section overhead (RSOH). That is, the RST sub-module detects the frame alignment bytes (A1 and A2), descrambles all the bytes except the first line of the RSOH, restores and checks the regenerator section trace byte (J0), and checks the B1 byte.
- In the transmit direction, the RST sub-module generates the RSOH. That is, the RST sub-module writes bytes such as A1, A2, and J0, calculates and writes the B1 byte, and scrambles all the bytes except the first line of the RSOH.
- MST sub-module
- In the receive direction, the MST sub-module terminates the multiplex section overhead (MSOH). That is, the MST sub-module generates the multiplex section-alarm indication signal (MS_AIS) alarm and detects the multiplex section-remote defect indication (MS_RDI) alarm after detecting the K2 byte, and detects the multiplex section-remote error indication (MS_REI) alarm and generates the B2-excessive errors (B2_EXC) alarm after checking the B2 byte.
- In the transmit direction, the MST sub-module generates the MSOH. That is, the MST sub-module writes bytes such as E2, D4-D12, K1, K2, S1, and M1, and calculates and writes the B2 byte.
- MSA sub-module
- In the receive direction, the MSA sub-module de-interleaves the administration unit group (AUG), divides an AUG into N AU-4s, detects the administration unit-loss of pointer (AU_LOP) alarm and the administration unit-alarm indication signal (AU_AIS) alarm, and performs pointer justifications.
- In the transmit direction, the MSA sub-module assembles the AUG and generates the AU-4. N AU-4s are multiplexed into an AUG through byte interleaving.
- HPT sub-module
- In the receive direction, the HPT sub-module terminates the path overhead (POH). That is, the HPT sub-module detects the higher order path-remote error indication (HP_REI) alarm after checking the B3 byte, generates the higher order path-trace identifier mismatch (HP_TIM) alarm and the higher order path-signal label mismatch (HP_SLM) alarm and detects the higher order path-remote defect indication (HP_RDI) alarm after detecting the J1 and C2 bytes, and generates the higher order path-unequipped (HP_UNEQ) alarm after detecting the C2 byte.
- In the transmit direction, the HPT sub-module generates the POH. That is, the HPT sub-module writes bytes such as J1 and C2, and calculates and writes the B3 byte.
this module includes the RST, MST, MSA, and HPT sub-modules. This module provides the inloop and outloop functions.
- RST sub-module
- In the receive direction, the RST sub-module terminates the regenerator section overhead (RSOH). That is, the RST sub-module detects the frame alignment bytes (A1 and A2), descrambles all the bytes except the first line of the RSOH, restores and checks the regenerator section trace byte (J0), and checks the B1 byte.
- In the transmit direction, the RST sub-module generates the RSOH. That is, the RST sub-module writes bytes such as A1, A2, and J0, calculates and writes the B1 byte, and scrambles all the bytes except the first line of the RSOH.
- MST sub-module
- In the receive direction, the MST sub-module terminates the multiplex section overhead (MSOH). That is, the MST sub-module generates the multiplex section-alarm indication signal (MS_AIS) alarm and detects the multiplex section-remote defect indication (MS_RDI) alarm after detecting the K2 byte, and detects the multiplex section-remote error indication (MS_REI) alarm and generates the B2-excessive errors (B2_EXC) alarm after checking the B2 byte.
- In the transmit direction, the MST sub-module generates the MSOH. That is, the MST sub-module writes bytes such as E2, D4-D12, K1, K2, S1, and M1, and calculates and writes the B2 byte.
- MSA sub-module
- In the receive direction, the MSA sub-module de-interleaves the administration unit group (AUG), divides an AUG into N AU-4s, detects the administration unit-loss of pointer (AU_LOP) alarm and the administration unit-alarm indication signal (AU_AIS) alarm, and performs pointer justifications.
- In the transmit direction, the MSA sub-module assembles the AUG and generates the AU-4. N AU-4s are multiplexed into an AUG through byte interleaving.
- HPT sub-module
- In the receive direction, the HPT sub-module terminates the path overhead (POH). That is, the HPT sub-module detects the higher order path-remote error indication (HP_REI) alarm after checking the B3 byte, generates the higher order path-trace identifier mismatch (HP_TIM) alarm and the higher order path-signal label mismatch (HP_SLM) alarm and detects the higher order path-remote defect indication (HP_RDI) alarm after detecting the J1 and C2 bytes, and generates the higher order path-unequipped (HP_UNEQ) alarm after detecting the C2 byte.
- In the transmit direction, the HPT sub-module generates the POH. That is, the HPT sub-module writes bytes such as J1 and C2, and calculates and writes the B3 byte.
Logic and Control Module
- Manages and configures the other modules of the board.
- Performs inter-board communication through the internal Ethernet interface.
- Traces the clock signal from the active and standby cross-connect units.
- Controls the laser.
- Passes the orderwire and ECC bytes through an ADM that consists of two paired slots when the GSCC is not in position.
- Selects the clock signal and frame header signal from the active and standby cross-connect units.
- Controls the indicators on the board.
- Manages and configures the other modules of the board.
- Performs inter-board communication through the internal Ethernet interface.
- Traces the clock signal from the active and standby cross-connect units.
- Controls the laser.
- Passes the orderwire and ECC bytes through an ADM that consists of two paired slots when the GSCC is not in position.
- Selects the clock signal and frame header signal from the active and standby cross-connect units.
- Controls the indicators on the board.
Power Module
It converts the -48 V/-60 V power supply into the DC voltages that the modules of the board require.
It converts the -48 V/-60 V power supply into the DC voltages that the modules of the board require.
Front Panel
The front panel of the SLD4A has indicators, interfaces, a bar code, and a laser safety class label.
The front panel of the SLD4A has indicators, interfaces, a bar code, and a laser safety class label.
Diagram of the Front Panel
Indicators
The front panel of the board has the following indicators:
- Board hardware status indicator (STAT) - two colors (red and green)
- Service activation status indicator (ACT) - one color (green)
- Board software status indicator (PROG) - two colors (red and green)
- Service alarm indicator (SRV) - three colors (red, green, and yellow)
For the meanings of the status of the indicators, see Indicators.
The front panel of the board has the following indicators:
- Board hardware status indicator (STAT) - two colors (red and green)
- Service activation status indicator (ACT) - one color (green)
- Board software status indicator (PROG) - two colors (red and green)
- Service alarm indicator (SRV) - three colors (red, green, and yellow)
For the meanings of the status of the indicators, see Indicators.
Interfaces
The front panel of the SLD4A has two optical interfaces. Table 1 describes the types and usage of the optical interfaces of the SLD4A.
Table 1 Optical interfaces of the SLD4A
Interface Type of Interface Usage IN1-IN2 LC Receives optical signals. OUT1-OUT2 LC Transmits optical signals.
The SLD4A can use the swappable optical modules to facilitate maintenance.
The front panel of the SLD4A has two optical interfaces. Table 1 describes the types and usage of the optical interfaces of the SLD4A.
| Interface | Type of Interface | Usage |
|---|---|---|
| IN1-IN2 | LC | Receives optical signals. |
| OUT1-OUT2 | LC | Transmits optical signals. |
The SLD4A can use the swappable optical modules to facilitate maintenance.
Valid Slots
The slots valid for the SLD4A vary with the cross-connect capacity of the subrack.
NOTE:
The slots valid for a board are determined by the following factors:
- Slot bandwidth
- Cross-connect capacity
- Board version
The slots valid for the SLD4A are as follows:
- When the cross-connect capacity is 200 Gbit/s, the SLD4A can be installed in slots 1-8 and 11-17.
The slots valid for the SLD4A vary with the cross-connect capacity of the subrack.
NOTE:
The slots valid for a board are determined by the following factors:
- Slot bandwidth
- Cross-connect capacity
- Board version
The slots valid for the SLD4A are as follows:
- When the cross-connect capacity is 200 Gbit/s, the SLD4A can be installed in slots 1-8 and 11-17.
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 SLD4A indicates the type of optical interface.
Table 1 provides the relationship between the feature code of the SLD4A and the type of optical interface.
Table 1 Relationship between the feature code of the SLD4A and the type of optical interface
Board Feature Code Type of Optical Interface SSN1SLD4A10 10 S-4.1 SSN1SLD4A11 11 L-4.1 SSN1SLD4A12 12 L-4.2 SSN1SLD4A13 13 Ve-4.2 SSN1SLD4A14 14 I-4 SSN1SLD4A15 15 S-4.1 SSN1SLD4A16 16 L-4.1 SSN1SLD4A17 17 L-4.2 SSN1SLD4A18 18 Ve-4.2 SSN1SLD4A19 19 I-4 SSN1SLD4A20 20 S-4.1 SSN1SLD4A21 21 L-4.1 SSN1SLD4A22 22 L-4.2
The number code that follows the board name in the bar code is the feature code of the board. The feature code of the SLD4A indicates the type of optical interface.
Table 1 provides the relationship between the feature code of the SLD4A and the type of optical interface.
| Board | Feature Code | Type of Optical Interface |
|---|---|---|
| SSN1SLD4A10 | 10 | S-4.1 |
| SSN1SLD4A11 | 11 | L-4.1 |
| SSN1SLD4A12 | 12 | L-4.2 |
| SSN1SLD4A13 | 13 | Ve-4.2 |
| SSN1SLD4A14 | 14 | I-4 |
| SSN1SLD4A15 | 15 | S-4.1 |
| SSN1SLD4A16 | 16 | L-4.1 |
| SSN1SLD4A17 | 17 | L-4.2 |
| SSN1SLD4A18 | 18 | Ve-4.2 |
| SSN1SLD4A19 | 19 | I-4 |
| SSN1SLD4A20 | 20 | S-4.1 |
| SSN1SLD4A21 | 21 | L-4.1 |
| SSN1SLD4A22 | 22 | L-4.2 |
Technical Specifications of the SLD4A
Parameters Specified for Interfaces
Table 1 lists the parameters specified for the optical interfaces of the SLD4A.
Table 1 Specifications of the ports
Port type Description I-4 2 km STM-4 two-fiber bidirectional optical interfaces S-4.1 15 km STM-4 two-fiber bidirectional optical interfaces L-4.1 40 km STM-4 two-fiber bidirectional optical interfaces L-4.2 80 km STM-4 two-fiber bidirectional optical interfaces Ve-4.2 100 km STM-4 two-fiber bidirectional optical interfaces
Table 1 lists the parameters specified for the optical interfaces of the SLD4A.
| Port type | Description |
|---|---|
| I-4 | 2 km STM-4 two-fiber bidirectional optical interfaces |
| S-4.1 | 15 km STM-4 two-fiber bidirectional optical interfaces |
| L-4.1 | 40 km STM-4 two-fiber bidirectional optical interfaces |
| L-4.2 | 80 km STM-4 two-fiber bidirectional optical interfaces |
| Ve-4.2 | 100 km STM-4 two-fiber bidirectional optical interfaces |
Laser Safety Class
The safety class of the laser on the board is Class 1. The maximum launched optical power of the optical interfaces is less than 10 dBm (10 mW).
The safety class of the laser on the board is Class 1. The maximum launched optical power of the optical interfaces is less than 10 dBm (10 mW).
Mechanical Specifications
The mechanical specifications of the SLD4A are as follows:
- Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
- Weight (kg): 0.6
The mechanical specifications of the SLD4A are as follows:
- Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
- Weight (kg): 0.6
Power Consumption
The maximum power consumption of the SLD4A at room temperature (25°C) is 17 W.
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The maximum power consumption of the SLD4A at room temperature (25°C) is 17 W.
As a world leading Huawei networking products supplier, Hong Telecom Equipment Service LTD(HongTelecom) keeps regular stock of Huawei router and switch and all cards at very good price, also HongTelecom ship to worldwide with very fast delivery.
For related articles, visit the HongTelecom Blog and HongTelecom Blogger.
For real pictures of related product, visit the HongTelecom Gallery.
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