Huawei OSN 3500 SL64 N1SL64 N2SL64 N4SL64 Supplier

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 SL64 is available in several functional versions. The N2SL64 is discontinued. The functions provided by the functional versions are different.

Table 1 describes the versions of the SL64.

Table 1 Versions of the SL64

Item	Description
Functional versions	The SL64 is available in the following functional versions: N4, N2 and N1.
Differences	The N1SL64/N4SL64 supports the board version replacement function, but does not support the TCM function or AU-3 services. The N2SL64 does not support the board version replacement function, but supports the TCM function and AU-3 services, the TCM function and AU-3 services cannot be available at the same time. The N4SL64 supports pluggable XFP optical modules. The N4SL64 detects and reports voltage performance. SL64 boards of different versions support different loopback functions. For details, see Functions and Features.
Substitution	When the TCM function and AU-3 services are not required, the N1SL64 can substitute for the N2SL64. When the TCM function and AU-3 services are not required, the N4SL64 can substitute for the N2SL64. The N4SL64 supports the board version replacement function to substitute for the N1SL64.

 NOTE:

• When you configure the MSP or SNCP, you cannot configure the N1SL64 as the protection board if the working board is the N2SL64 on which the TCM function is enabled or AU-3 services are configured. Otherwise, the services are interrupted when a switching operation is performed.

Version Mapping

Board	Start Version
N1SL64	V100R002C02
N2SL64	V100R002C02
N4SL64	V100R010C03

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 SL64 is a line board. The SL64 can be used on the OptiX OSN equipment series to transmit and receive STM-64 optical signals. The SL64 converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SL64 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 SL64 receives and transmits 1xSTM-64 optical signals and processes overhead bytes.

Table 1 describes the functions and features of the SL64.

Table 1 Functions and features of the SL64

Function and Feature	Description
Basic functions	Transmits and receives 1xSTM-64 optical signals.
Specifications of the optical interface	The N1SL64/N2SL64 supports different types of standard optical interfaces, namely, the I-64.1, I-64.2, S-64.2b, L-64.2b (BA), Le-64.2, Ls-64.2, and V-64.2b (BA + PA + dispersion compensation unit (DCU)). The characteristics of the optical interfaces of the S-64.2b, L-64.2b, Ls-64.2, and V-64.2b types comply with ITU-T G.691 and ITU-T G.692. The characteristics of the optical interface of the Le-64.2 type comply with the standards defined by Huawei. The N4SL64 supports different types of standard optical interfaces, namely, the I-64.1, S-64.2b, Le-64.2, P1L1-2D2, and V-64.2b (BA + PA + DCU). The characteristics of the optical interfaces of the I-64.1, S-64.2b, Le-64.2, and V-64.2b types comply with ITU-T G.691. The characteristics of the optical interface of the P1L1-2D2 type comply with ITU-T G.959. The N1SL64/N2SL64 supports the DWDM colored optical interfaces, which use LC connectors. The DWDM optical interface supports the transmission distance of 40 km. The N4SL64 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 distance of 40 km and 80 km. N4SL64 supports one-fiber bidirectional optical modules. Supports the output of the standard wavelengths that comply with ITU-T G.692 and can be directly connected to the WDM equipment.
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. The N4SL64 supports the usage and detection of the pluggable XFP optical module, which facilitates the maintenance and upgrading of the optical module.
Service processing	Supports the VC-12 services, VC-3 services, and VC-4 services. The N1SL64, N2SL64, and N4SL64 support the VC-4-4c concatenation services, VC-4-8c concatenation services, Vc-4-16c concatenation services, and VC-4-64c concatenation services. The N2SL64 supports the AU-3 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 one channel of ECC communication.
Alarms and performance events	Reports various alarms and performance events.
Specifications of the REG	Supports the setting and query of the REG working mode. With the REG function enabled, the board is in RS loopback mode and processes only the regeneration section overhead.
Protection schemes	Supports Two-fiber ring MSP. Supports Four-fiber ring MSP. Supports Linear MSP. Supports SNCP. Supports SNCMP. Supports SNCTP. Supports the fiber-shared virtual trail protection. Supports the fiber-shared MSP and processes two sets of K bytes. One SL64 supports a maximum of two MSP rings.
Maintenance features	Supports inloops and outloops at optical interfaces. The N1SL64/N4SL64 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. The N2SL64 supports the TCM function. Supports the upgrade of the board software without affecting services. Supports the press-to-collect function in fault data collection. The N4SL64 detects and reports voltage performance. Supports the PRBS function. For details, see Availability. Hot board swapping.

Working Principle and Signal Flow

The SL64 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 N1SL64/N2SL64/N4SL64.

Figure 1 Functional block diagram of the N1SL64/N2SL64/N4SL64

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 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 J0 byte, 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 AUG, divides an AUG into N AU-4s, detects the AU_LOP alarm and the 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 SL64 has indicators, interfaces, a bar code, a laser safety class label, and an APD alarm label.

Diagram of the Front Panel

Figure 1 shows the appearance of the front panel of the N1SL64/T2SL64.

Figure 1 Appearance of the front panel of the N1SL64/T2SL64

Figure 2 shows the appearance of the N4SL64.

Figure 2 Appearance of the front panel of the N4SL64

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 SL64 has one optical interface. Table 1 describes the types and usage of the optical interfaces of the SL64.

Table 1 Optical interfaces of the SL64

Interface	Type of Interface	Usage
IN	LC	Receives optical signals.
OUT	LC	Transmits optical signals.

Valid Slots

The SL64 must be installed in a valid slot in the subrack. Otherwise, the SL64 fails to work normally.

 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 SL64 vary with the cross-connect capacity of the subrack. The slots valid for the SL64 are as follows:

• When the cross-connect capacity is 200 Gbit/s, the N1SL64 and N2SL64 can be installed in slots 7, 8, 11, and 12; the N4SL64 can be installed in slots 5-8 and 11-14.

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 SL64 indicates the type of optical interface.

Table 1 describes the relationship between the feature code of the SL64 and the type of optical interface.

Table 1 Relationship between the feature code of the SL64 and the type of optical interface

Board	Feature Code	Type of Optical Interface
SSN1SL6400	00	Fixed-wavelength optical interface
SSN4SL6401M01	01M01	Fixed-wavelength optical interface
SSN1SL6401	01	I-64.2
SSN1SL6402, SSN4SL6402	02	S-64.2b
SSN1SL6403	03	Le-64.2
SSN1SL6404	04	Ls-64.2
SSN1SL6405	05	L-64.2b
SSN1SL6406	06	V-64.2b
SSN2SL6400	00	Fixed-wavelength optical interface
SSN2SL6411	11	I-64.2
SSN2SL6412	12	S-64.2b
SSN2SL6413	13	Le-64.2
SSN2SL6402	02	S-64.2b
SSN2SL6403	03	Le-64.2
SSN2SL6404	04	Ls-64.2
SSN2SL6405	05	L-64.2b
SSN2SL6406	06	V-64.2b
SSN2SL6415	15	L-64.2b
SSN2SL6416	16	V-64.2b
SSN4SL6401	01	I-64.1
SSN4SL6402	02	S-64.2b
SSN4SL6403	03	P1L1-2D2
SSN4SL6404	04	V-64.2b
SSN4SL6405	05	Le-64.2

Technical Specifications of the SL64

The technical specifications of the SL64 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 N1SL64.

Table 1 Specifications of the ports of the N1SL64/N2SL64

Port type	Description
I-64.1	2 km STM-64 two-fiber bidirectional optical interfaces
I-64.2	25 km STM-64 two-fiber bidirectional optical interfaces
S-64.2b	40 km STM-64 two-fiber bidirectional optical interfaces
L-64.2b (BA)	80 km STM-64 two-fiber bidirectional optical interfaces
Le-64.2	60 km STM-64 two-fiber bidirectional optical interfaces
Ls-64.2	80 km STM-64 two-fiber bidirectional optical interfaces
V-64.2b (BA+PA+DCU)	120 km STM-64 two-fiber bidirectional optical interfaces
40 km DWDM	40 km DWDM STM-64 optical interfaces

Table 2 list the parameters specified for the optical interfaces of the N4SL64.

Table 2 Parameters specified for the optical interfaces of the N4SL64

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
Le-64.2	60 km STM-64 two-fiber bidirectional optical interfaces
P1L1-2D2	80 km STM-64 two-fiber bidirectional optical interfaces
V-64.2b (BA+PA+DCU)	120 km STM-64 two-fiber bidirectional optical interfaces
70 km CWDM	70 km CWDM STM-64 optical interfaces
40 km DWDM	40 km DWDM 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 SL64 are as follows:

• Dimensions (mm): 25.4 (W) x 235.2 (D) x 261.4 (H)
• Weight (kg): 1.1

Power Consumption

The maximum power consumption of the N1SL64 at room temperature (25°C) is 30 W.

The maximum power consumption of the N2SL64 at room temperature (25°C) is 32 W.

The maximum power consumption of the N4SL64 at room temperature (25°C) is 15 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.

To buy related product, visit the HongTelecom Online Shop.