Huawei OSN 3500 SLQ41 N3SLQ41 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 SLQ41 is available in one functional version, namely, N3. The SLQ41 supports the auto-sensing of optical interfaces.

Version Mapping

Board	Start Version
N3SLQ41	V100R009C02

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 SLQ41 is a line board. The SLQ41 can be used on the OptiX OSN equipment series to transmit and receive STM-1/STM-4 optical signals. The SLQ41 converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SLQ41 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 SLQ41 transmits and receives STM-1 or STM-4 optical signals, performs O/E conversion for the STM-1 or 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 SLQ41.

Table 1 Functions and features of the SLQ41

Function and Feature	Description
Basic functions	Transmits and receives 4xSTM-1 or 4xSTM-4 optical signals.
Specifications of the optical interface	The STM-1 optical module or STM-4 optical module can be used. When the STM-1 optical module is used, the SLQ41 supports different types of standard optical interfaces, namely, the I-1, S-1.1, L-1.1, L-1.2, and Ve-1.2. The characteristics of the optical interfaces of the I-1, S-1.1, L-1.1, and L-1.2 types comply with ITU-T G.957. The characteristics of the optical interface of the Ve-1.2 type comply with the standards defined by Huawei. When the STM-4 optical module is used, the SLQ41 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. Supports the CWDM and DWDM colored optical interfaces. The optical interface uses the LC connector. The CWDM optical interface supports the transmission distance of 80 km, and the DWDM optical interface supports the transmission distance of 120 km.
Specifications of the optical module	Supports the detection and query of the information about the optical module. Supports the usage and detection of the SFP optical module, which facilitates the maintenance and upgrading of the optical module. Provides the ALS function. The optical interface supports the setting of the on/off state of a laser. The SLQ41 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	When the STM-1 optical module is used, the SLQ41 supports the VC-12 services, VC-3 services, and VC-4 services. When the STM-4 optical module is used, the SLQ41 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-1 signals or 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	Supports the Two-fiber ring MSP (only two-fiber unidirectional protection is supported when STM-1 optical modules are installed). Supports the Four-fiber ring MSP. Supports the Linear MSP. Supports the SNCP. Supports the SNCMP. Supports the SNCTP.
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 PRBS function. For details, see Availability. Supports the press-to-collect function in fault data collection. Hot board swapping.

Working Principle and Signal Flow

The SLQ41 consists of the O/E converting module, CDR module, SDH overhead processing module, logic and control module, and power module.

This topic describes the working principle and signal flow of the SLQ41 by describing how to process STM-1/STM-4 signals.

Figure 1 shows the functional block diagram of the SLQ41.

Figure 1 Functional block diagram of the SLQ41

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	-

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.

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 SLQ41 has indicators, interfaces, a bar code, and a laser safety class label.

Diagram of the Front Panel

Figure 1 shows the appearance of the front panel of the SLQ41.

Figure 1 Front panel of the SLQ41

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 SLQ41 has four optical interfaces. Table 1 describes the types and usage of the optical interfaces of the SLQ41.

Table 1 Optical interfaces of the SLQ41

Interface	Type of Interface	Usage
IN1-IN4	LC	Receives optical signals.
OUT1-OUT4	LC	Transmits optical signals.

Valid Slots

The SLQ41 must be installed in a valid slot in the subrack. Otherwise, the SLQ41 cannot work normally.

 NOTE:

The slots valid for a board are determined by the following factors:

• Slot bandwidth
• Cross-connect capacity
• Board version

• When the cross-connect capacity is 200 Gbit/s, the slots valid for the SLQ41 are as follows:
  • The SLQ41 can be installed in slots 1-4, 15, and 16. In this case, one or two optical interfaces can be configured.
  • The SLQ41 can be installed in slots 5-8 and 11-14. In this case, one to four optical interfaces can be configured.

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 SLQ41 indicates the type of optical interface.

Table 1 provides the relationship between the feature code of the SLQ41 and the type of optical interface.

Table 1 Relationship between the feature code of the SLQ41 and the type of optical interface

Board	Feature Code	Type of Optical Interface
SSN3SLQ414	14	I-4
SSN3SLQ410	10	S-4.1
SSN3SLQ411	11	L-4.1
SSN3SLQ412	12	L-4.2
SSN3SLQ413	13	Ve-4.2
SSN3SLQ114	14	I-1
SSN3SLQ110	10	S-1.1
SSN3SLQ111	11	L-1.1
SSN3SLQ112	12	L-1.2
SSN3SLQ113	13	Ve-1.2

Technical Specifications of the SLQ41

The technical specifications of the SLQ41 include the parameters specified for optical interfaces, laser safety class, mechanical specifications, and power consumption.

Parameters Specified for Interfaces

The SLQ41 supports the STM-1 and STM-4 optical modules.

Table 1 lists the parameters specified for the optical interfaces of the SLQ41.

Table 1 Specifications of the ports

Port type	Description
I-1	2 km STM-1 two-fiber bidirectional optical interfaces
S-1.1	15 km STM-1 two-fiber bidirectional optical interfaces
L-1.1	40 km STM-1 two-fiber bidirectional optical interfaces
L-1.2	80 km STM-1 two-fiber bidirectional optical interfaces
Ve-1.2	100 km STM-1 two-fiber bidirectional optical interfaces
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
S-1.1	15 km STM-1 single-fiber bidirectional optical interfaces
L-1.1	40 km STM-1 single-fiber bidirectional optical interfaces
S-4.1	10 km STM-4 single-fiber bidirectional optical interfaces
80 km CWDM	80 km CWDM optical interfaces
120 km DWDM	120 km DWDM 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).

Mechanical Specifications

The mechanical specifications of the SLQ41 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 SLQ41 at room temperature (25°C) is 12 W.

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