Huawei OSN 3500 SLD64 N1SLD64 N4SLD64 SSN1SLD64 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 SLD64 is available in the following functional versions: N1 and N4.

Table 1 describes the versions of the SLD64.

Table 1 Versions of the SLD64

Item	Description
Functional versions	The SLD64 is available in the following functional versions: N1 and N4.
Differences	Interface specifications: The N4SLD64 supports CWDM and DWDM colored optical interfaces, whereas the N1SLD64 does not. The N4SLD64 supports single-fiber bidirectional optical modules, whereas the N1SLD64 does not. Others: The N4SLD64 detects and reports voltage performance, whereas the N1SLD64 does not. The N4SLD64 supports the PRBS function, whereas the N1SLD64 does not.
Substitution	None

Version Mapping

Board	Start Version
N1SLD64	V100R007C01
N4SLD64	V100R010C00

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 SLD64 is a line board. The SLD64 can be used on the OptiX OSN equipment series to transmit and receive STM-64 optical signals. The SLD64 converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SLD64 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 SLD64 receives and transmits 2xSTM-64 optical signals, processes overhead bytes, and performs the MSP protection.

Table 1 describes the functions and features of the SLD64.

Table 1 Functions and features of the SLD64

Function and Feature	Description
Basic functions	Provides two optical interfaces to transmit and receive 2xSTM-64 optical signals. Processes 2xSTM-64 standard services or concatenated services, which are encapsulated in XFP format.
Specifications of the optical interface	Supports different types of standard optical interfaces, namely, the I-64.1 and S-64.2b. The characteristics of the optical interfaces comply with ITU-T G.691. The N4SLD64 provides standard P1L1-2D2 optical ports, whose specifications comply with ITU-T G.959. The N4SLD64 supports the CWDM and DWDM colored optical interfaces. The optical interface uses the LC connector. The CWDM optical interface supports the transmission distance of 70 km, and the DWDM optical interface supports the transmission distances of 80 km. N4SLD64 supports one-fiber bidirectional optical modules.
Specifications of the optical module	Supports the query of the manufacturing information of the optical module. The SLD64 also reports the performance events that indicate the performance of the optical module. Supports the default off state of the laser, and the setting and query of the on/off state of the laser. Supports the usage and detection of the XFP optical module, therefore facilitating maintenance of the optical module.
Service processing	Supports the VC-12 services, VC-3 services, VC-4 services, VC-4-4c concatenation services, VC-4-8c concatenation services, VC-4-16c concatenation services, and VC-4-64c concatenation services.
Overhead processing	Processes the section overheads of the STM-64 signals. Supports the transparent transmission and termination of the path overheads. Supports the setting and query of the J0, J1, and C2 bytes. Supports two channels of ECC communication.
Alarms and performance events	Reports various alarms and performance events.
Specifications of the REG	Does not support the REG.
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 fiber-shared virtual trail protection. Supports the fiber-shared MSP and processes four sets of K bytes. A single optical interface can process two sets of K bytes. One SLD64 supports a maximum of four MSP 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. The N4SLD64 supports detection and query of the voltage. Supports the PRBS function. For details, see Availability. Hot board swapping.

Working Principle and Signal Flow

The SLD64 consists of the O/E converting module, MUX/DEMUX module, SDH overhead processing module, logic and control module, and power module.

Figure 1 shows the functional block diagram of the SLD64.

Figure 1 Functional block diagram of the SLD64

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	-	-

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.

MUX/DEMUX Module

• In the receive direction, the DEMUX part demultiplexes the high rate electrical signals into multiple parallel electrical signals, and recovers the clock signal at the same time.
• In the transmit direction, the MUX part multiplexes the parallel electrical signals received from the SDH overhead processing module into high rate electrical signals.

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 detects K2 bytes, and upon errors, generates MS_AIS or MS_RDI alarms; it also verifies B2 bytes, and upon errors, generates B2_SD or B2_EXC alarms and sends MS_REI signals to its opposite end.
  • 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 verifies B3 bytes, and upon errors, sends HP_REI signals to its opposite end; it also detects J1 and C2 bytes, and upon errors, generates HP_TIM, HP_SLM, or HP_UNEQ (if VC-4 paths are unloaded) alarms.
  • 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 SLD64 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 SLD64.

Figure 1 Front panel of the SLD64

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 SLD64 has two optical interfaces. Table 1 describes the types and usage of the optical interfaces of the SLD64.

Table 1 Optical interfaces of the SLD64

Interface	Type of Interface	Usage
IN1-IN2	LC	Receives optical signals.
OUT1-OUT2	LC	Transmits optical signals.

Valid Slots

The SLD64 must be installed in a valid slot in the subrack. Otherwise, the SLD64 fails to work normally.

The SLD64 can be installed in slots 7, 8, 11, and 12.

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 SLD64 indicates the type of optical interface.

Table 1 describes the relationship between the feature code of the SLD64 and the type of optical interface.

Table 1 Relationship between the feature code of the SLD64 and the type of optical interface

Board	Feature Code	Type of Optical Interface
SSN1SLD6401, SSN4SLD6401	01	I-64.1
SSN1SLD6402, SSN4SLD6402	02	S-64.2b
SSN4SLD6403	03	P1L1-2D2

Technical Specifications of the SLD64

The technical specifications of the SLD64 include the parameters specified for optical interfaces, laser safety class, mechanical specifications, and power consumption.

Parameters Specified for Interfaces

Table 1 lists the parameters specified for the optical interfaces of the SLD64.

 NOTE:

SLD64 boards only of the N4 version support P1L1-2D2 interfaces.

Table 1 Specifications of the ports of the SLD64

Port type	Description
I-64.1	2 km STM-64 two-fiber bidirectional optical interfaces
S-64.2b	40 km STM-64 two-fiber bidirectional optical interfaces
P1L1-2D2	80 km STM-64 two-fiber bidirectional optical interfaces

Table 2 list the parameters specified for the colored optical interfaces of the N4SLD64.

Table 2 Specifications of the colored optical interfaces of the N4SLD64

Port type	Description
70 km CWDM	70 km CWDM STM-64 optical interfaces
80 km DWDM	80 km DWDM STM-64 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 SLD64 are as follows:

• Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
• Weight (kg): 1.2

Power Consumption

The maximum power consumption of the N1SLD64 at room temperature (25°C) is 41 W.

The maximum power consumption of the N4SLD64 at room temperature (25°C) is 20 W.

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