Huawei OSN 3500 SF16E N1SF16E SSN1SF16E Best 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 SF16E is available in one functional version, namely, N1.

Version Mapping

Board	Start Version
N1SF16E	V200R012C00

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

SF16E boards are line boards. They can transmit and receive STM-16 optical signals when being used on the OptiX OSN equipment, and can achieve ultra-long distance transmission when working with BPA, OBU1, OBU2, RPC01, or RPC02 boards.

SF16E boards can be used in four typical scenarios, as shown in Figure 1.

• Application 1: SF16E boards can achieve 72 dB span transmission if working with OBU1/OBU2 boards, RPC02 boards, and PAs.
• Application 2: SF16E boards can achieve 67 dB span transmission if working with OBU1/OBU2 boards and PAs.
• Application 3: SF16E boards can achieve 75 dB span transmission if working with BAs, RPC01 boards, RPC02 boards, and PAs.
• Application 4: SF16E boards can achieve 61 dB span transmission if working with BAs and PAs.

Figure 1 Typical networking and application of SF16E boards

Functions and Features

The SF16E receives and transmits 1xSTM-16 optical signals (2.666 Gbit/s with the out-band EFEC function) and processes overhead bytes.

Table 1 provides the functions and features of the SF16E.

Table 1 Functions and features of the SF16E

Function and Feature	Description
Basic functions	Receives and transmits 1xSTM-16 optical signals (2.666 Gbit/s with the out-band EFEC function). Supports the enabling or disabling of the EFEC function.
Specifications of the optical interface	Supports the output of the standard wavelengths that comply with ITU-T G.692 and can be directly connected to the DWDM equipment. Supports the DWDM colored optical interfaces. The optical interface uses the LC connector. 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. Provides the ALS function. The optical interface supports the setting of the on/off state of a laser.
Service processing	Supports the VC-12 services, VC-3 services, VC-4 services, VC-4-4c concatenation services, VC-4-8c concatenation services, and VC-4-16c concatenation services. Encapsulates and encodes the signals with the EFEC function, and processes overhead bytes, which comply with ITU-T G.709.
Overhead processing	Processes the section overheads of the STM-16 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	Supported.
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 and processes two sets of K bytes. One SF16E supports a maximum of two 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. Supports the PRBS function. For details, see Availability. Hot board swapping.

Working Principle and Signal Flow

The SF16E consists of the O/E converting module, MUX/DEMUX module, EFEC module, SDH overhead processing module, logic and control module, and power module.

Figure 1 shows the functional block diagram of the SF16E.

Figure 1 Functional block diagram of the SF16E

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	-

The functional modules 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.

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.

EFEC Module

• In the upstream direction, the reverse process is performed. The EFEC encoding and decoding module receives the 2.666 Gbit/s signals from the DEMUX module. After frame searching, EFEC encoding, data packets encapsulation, and scrambling in the EFEC module, the 2.488 Gbit/s signals are recovered and then transmitted to the SDH overhead processing module. The frame format of the 2.666 Gbit/s signals complies with ITU G.709.
• In the downstream direction, the EFEC encoding and decoding module receives 2.488 Gbit/s SDH signals, which are sent by the SDH overhead processing module. After frame searching, EFEC encoding, data packet encapsulation, and scrambling, the 2.488 Gbit/s SDH signals are converted into 2.666 Gbit/s signals and then transmitted to the MUX module.
• The EFEC processing module is connected to the logic and control module through a CPU bus. The CPU controls the working modes of the EFEC module by configuring the internal register. The CPU can monitor the performance through the internal register.

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 SF16E 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 SF16E.

Figure 1 Front panel of the SF16E

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 SF16E has one optical interface. Table 1 describes the types and usage of the optical interfaces of the SF16E.

Table 1 Optical interfaces of the SF16E

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

Valid Slots

The SF16E must be installed in a valid slot in the subrack. Otherwise, the SF16E cannot work properly.

The SF16E can be installed in slots 5-8 and 11-14 in a subrack.

Technical Specifications of the SF16E

The technical specifications of the SF16E include the parameters specified for optical interfaces, laser safety class, mechanical specifications, and power consumption.

Parameters Specified for Optical Interfaces

Table 1 lists the parameters specified for the fixed colored optical interfaces of the SF16E.

Table 1 Parameters specified for the fixed colored optical interfaces of the SF16E

Parameter	Value
	DWDM
Nominal bit rate	2666057.143 kbit/s
Type of optical interface	Single-mode LC
Transmission distance (km)	120
Launched optical power range (dBm)	0 to 4
Central frequency (THz)	193.4
Central frequency deviation (GHz)	±10
Receiver sensitivity (dBm)	-28
Minimum overload (dBm)	-8
Maximum allowed dispersion (ps/nm)	2400
Minimum extinction ratio (dB)	8.2
Maximum -20 dB spectral width (nm)	0.3
Minimum side mode suppression ratio (dB)	30

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 lower than 10 dBm (10 mW).

Mechanical Specifications

The mechanical specifications of the SF16E 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 SF16E at room temperature (25°C) is 26 W.

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