Huawei OSN SLH1 N1SLH1 SSN1SLH1 Price

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 SLH1 is available in one functional version, namely, N1.

Version Mapping

Board	Start Version
N1SLH1	V100R006C02

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.

Application

The SLH1 is a line board. The SLH1 can be used on the OptiX OSN equipment series to transmit and receive STM-1 optical/electrical signals. The SLH1 converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side, or directly sends the received electrical signals to the cross-connect side. In addition, the SLH1 converts the electrical signals sent from the cross-connect side into optical signals and transmits the optical signals.

Figure 1 shows the application of the SDH processing boards. The SDH processing boards can form a ring network or a chain network in the system.

Figure 1 Networking and application of the SDH processing boards

Functions and Features

The SLH1 processes STM-1 optical and electrical signals.

Table 1 provides the functions and features of the SLH1.

Table 1 Functions and features of the SLH1

Function and Feature	SLH1
Basic functions	Processes 16xSTM-1 signals.
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 detection of the SFP optical module, which facilitates the maintenance and upgrading of the optical module. 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, and VC-4 services.
Overhead processing	Processes the section overheads of the STM-1 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 sixteen channels of ECC communication. Port 1 to port 8 support the ECC communication by using bytes D1-D12. Port 9 to port 16 support the ECC communication by using bytes D1-D3.
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. Supports the Four-fiber ring MSP. Supports the Linear MSP. Supports the SNCP. Supports the SNCMP. Supports the SNCTP. Supports the TPS protection when used with the interface board and the switching and bridging board.
Maintenance features	Supports inloops and outloops at optical interfaces. 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. Supports the press-to-collect function in fault data collection. Hot board swapping.

When the SLH1 works with different interface boards and electrical interface switching boards, the access capabilities for the STM-1 signals are different. For details, refer to Table 2.

Table 2 Access capabilities of the SLH1 when the SLH1 works with different interface boards and electrical interface switching boards

Interface Board	SLH1
None	The SLH1 cannot transmit/receive signals.
EU08	Transmits/Receives and processes 8-channel or 16-channel electrical signals.
OU08	Transmits/Receives and processes 8-channel or 16-channel optical signals.
EU08 + OU08	Transmits/Receives and processes 8-channel electrical signals and 8-channel optical signals.
EU08 + TSB8	Transmits/Receives and processes 8-channel or 16-channel STM-1 electrical signals, and realizes the 1:N (N≤3) TPS protection.

Working Principle and Signal Flow

The SLH1 consists of the CDR module, SDH overhead processing module, logic and control module, and power module. The external services are accessed by the external interface boards EU08 and OU08. The EU08 is an electrical interface board and the OU08 is an optical interface board.

Figure 1 shows the functional block diagram of the SLH1 when the SLH1 works with the EU08 by describing how to process 1xSTM-1 signals.

Figure 1 Functional block diagram of the SLH1 when the SLH1 works with the EU08

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	CDR: clock data restoration	-

Figure 2 shows the functional block diagram of the SLH1 when the SLH1 works with the OU08 by describing how to process 1xSTM-1 signals.

Figure 2 Functional block diagram of the SLH1 when the SLH1 works with the OU08

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	CDR: clock data restoration	-

CDR Module

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.

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.

Power Module

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 SLH1 has indicators and a bar code.

Diagram of the Front Panel

The front panel of the SLH1 does not have an interface. Hence, the SLH1 must be used with the EU08 or OU08. Figure 1 shows the appearance of the front panel of the SLH1.

Figure 1 Front panel of the SLH1

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.

Valid Slots

The SLH1 must be installed in a valid slot in the subrack. Otherwise, the SLH1 fails to work normally.

The slots valid for the SLH1 vary with the cross-connect capacity of the subrack. The SLH1 needs to work with the OU08/EU08 and TSB8. The slots valid for the SLH1 are as follows:

• When the cross-connect capacity is 200 Gbit/s, the SLH1 can be installed in slots 2-5 and 13-16.

Board Protection

The SLH1 supports the 1:N (N≤3) tributary protection switching (TPS) protection.

Protection Principle

The TPS protection is equipment-level protection. When the working board fails, the accessed signals are switched to the protection board. Hence, complex network-level protection operations such as the MSP and SNCP are not triggered. In addition, the reliability of the equipment is enhanced.

The SLH1 can work with the EU08 and TSB8 to realize one 1:N (N≤3) TPS protection group for 8xSTM-1 or 16xSTM-1 electrical signals. Figure 1 shows the TPS protection provided by the SLH1.

Figure 1 TPS protection provided by the SLH1

• Normal state
  When each working board functions normally, the traffic signal is directly transmitted to the corresponding working board through position 1 of the control switch on the interface board.

• Switching state
  When a working board detects a failure and requires the switching operation, the control switch of the corresponding interface board switches from position 1 to position 2. At the same time, the control switch of the protection switching board switches to the corresponding position so that the protection board can protect the failed working board.

 NOTE:

TPS trigger conditions on the OptiX OSN equipment are detected by the cross-connect and timing board. Therefore, TPS is successful even though the system control board cannot be detected or is faulty.

Hardware Configuration

Figure 2 shows the slot configuration for two 1:3 TPS protection groups for 16xSTM-1 signals of the SLH1.

Figure 2 Slot configuration for two 1:3 TPS protection groups of the SLH1

In Figure 2, the board in slot 2 protects the boards in slots 3-5. The board in slot 16 protects the boards in slots 13-15.

Table 1 lists the slots for the SLH1, EU08, and TSB8.

Table 1 Slots for the SLH1, EU08, and TSB8

Board	Protection Group 1	Protection Group 2
SLH1 (protection board)	Slot 2	Slot 16
TSB8	Slots 19-20	Slots 35-36
SLH1 (working board)	Slots 3-5	Slots 13-15
EU08	Slots 21-26	Slots 29-34

 NOTE:

When the equipment is configured for two 1:3 TPS protection groups for 8xSTM-1 signals of the SLH1, the TSB8 and EU08 can be inserted only in the odd slots.

Technical Specifications of the SLH1

The technical specifications of the SLH1 include the parameters specified for optical interfaces, mechanical specifications, and power consumption.

Parameters Specified for Interfaces

The OU8 or EU08 provides interfaces for the SLH1. For the parameters specified for the interfaces, see Technical Specifications of the EU08 and Technical Specifications of the OU08.

Mechanical Specifications

The mechanical specifications of the SLH1 are as follows:

• Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
• Weight (kg): 1.0

Power Consumption

The maximum power consumption of the SLH1 at room temperature (25°C) is 27 W.

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