Commissioning Optical Power of OTU Board

The overload of the APD receiver laser is -9 dBm. If the input optical power is higher, the APD laser may be damaged. Therefore, it is recommended that you insert the fiber loosely from the input optical port of the OTU during commissioning. After commissioning, make sure the input optical power is lower than the receiver overload before you insert the fiber.

Forcing the OTU Board to Emit Light

This section describes how to force the OTU board to emit light.

Prerequisites

The NE must be created on the U2000.

Tools, Equipment, and Materials

U2000

Background Information

The signals accessed on the client side or the WDM side should be service signals in actual transmission, or the optical signals generated by forcing the board to emit light.

The WDM side of the OTU board by default is forced to emit light. If it does not emit light, refer to the following procedure to query whether the board is forced to emit light. If the board is not forced to emit light, set the board to emit light.

Precautions

• The prerequisite for commissioning the ESC (Electric Supervisory Channel) is that the OTU is forced to emit light.

Procedure

1. In the NE Explorer window, select the desired OTU and choose Configuration > WDM Interface from the Function Tree.
2. Select Channel from the drop-down list.
3. Optional: Click the Basic Attributes tab. Set the Automatic Laser Shutdown of the optical port on the WDM side of the OTU to DISABLE.
   Only the LWX2, LWXD and LWXS can set Automatic Laser Shutdown of the WDM side.
4. Set the Laser Status of the optical port on the WDM side of the OTU to OPEN.
5. Click Apply.

Adjusting the Input Optical Power of OTU Board

ools, Equipment, and Materials

Optical power meter

Precautions

Before the equipment is powered on, verify that the fixed optical attenuator is configured according to the configuration rules. Verify the input optical power of the OTU (including the WDM side and client side) is lower than the receiver overload to avoid damage to the optical module during commissioning. Note that the overload of the APD receiver laser is only -9 dBm. Adjust the input optical power at the IN port on the WDM side of the OTU to ensure that the input optical power is within the optimal range: from -14 dBm to -25 dBm.For the specifications about the sensitivity and overload point of the OTU board.

Commissioning Requirements

• Adjust the input optical power at the IN port on the WDM side of the OTU to ensure that the input optical power is within the optimal range: from -12 dBm to -5 dBm; adjust the input optical power at the RXn port on the client side of the OTU to ensure that the input optical power is within the optimal range: from (sensitivity +3) dBm to (overload point -2) dBm.
• Confirm the optical preamplifier on the WDM side of the OTU at the receive end has output the standard optical power of single wavelength. When this occurs, the input optical power on the WDM side can be adjusted based on the actual optical power by adding, changing or removing the fixed optical attenuators.
• After commissioning, insert a fiber into the input optical port on the OTU when the input optical power reaches a normal state.

What are the Functions and Features of Huawei 40G Line Board NS3

Huawei NS3 board achieves cross-connection at the electrical layer, and to provide OTN interfaces and ESC. The TN56NS3 board supports hybrid transmission of OTN and SDH services.

The available functional versions of the NS3 board are TN11, TN52, TN54, TN55, and TN56.

• Only the OptiX OSN 8800 supports ODU0/ODU3.
• The relay mode is only supported by the TN54NS3/TN55NS3/TN56NS3.
• For the TN54NS3 board:
  • When the board is equipped with 40 Gbit/s-multirate-2km optical modules, it does not support OTU3e on the WDM side and ODU2e on the backplane side.
  • When the board is equipped with 800ps/nm-C band-tunable-ODB-PIN or 800ps/nm-C band-tunable-DQPSK-PIN optical modules, the preceding restriction does not apply.
• Only the TN56NS3 board supports SDH functions and features, including SDH overhead, physical clock (OCS), Electrical-layer ASON (SDH), SDH protection, and VC-4 channel loopback.

Basic functions and Features

• 40G Line Service Processing Board(AFEC DQPSK,Tunable), 50GHz(Rx1_PIN,Tx1_-5dBm~0dBm,LC)
• TN54NS3 board achieves cross-connection at the electrical layer and to provide OTN interfaces and ESC.
• The NS3 board can work in either line mode or relay mode.
• Supports the OTU3/OTU3e interface on the WDM side.
• Supports the OTN frame format and overhead processing by referring to the ITU-T G.709.
• OTU3 layer:supports the SM function.
• ODUk(k=0, 1, 2, 3, flex) layer supports the PMand TCM function, and PM and TCM non-intrusive monitoring functions.
• 80 wavelengths tunable in the C band with 50 GHz channel spacing
• Supports ESC functiona
• Supports the PRBS function on the WDM side.
• Supports ITU-T G.709-compliant forward error correction (FEC) on the WDM side.
• Supports ITU-T G.975.1-compliant AFEC-2 on the WDM side.
• The WDM-side signals of the TN54NS3 board can be regenerated using another TN54NS3 board.
• Supports IEEE 1588V2 at BC and OC mode, do not support TC and TC+OC mode.
• Supports Optical-layer ASON and Electrical-layer ASON (OTN)
• OTN protection
• Supports ODUk SNCP.
• Supports intra-board 1+1 protection (when working with the OLP/DCP/QCP board).
• Supports ODUk SPRing protection.
• Supports tributary SNCP protection.
• Supports OWSP protection.
• Supports SDH protection, SNCP, SNCTP, LMSP, MSP ring
• Supported Loopback at WDM side and ODU0/ODU1/ODU2 Channel Loopback

Huawei OSN3500 Introduction

Positioning

Huawei OptiX OSN 3500 intelligent optical transmission system (the OptiX OSN 3500 for short) developed by Huawei is the next-generation intelligent optical transmission equipment.

Huawei OptiX OSN 3500 is of a "universal switch" architecture. That is, the OptiX OSN 3500 can be used in packet mode or in TDM mode. When used with the other equipment of Huawei, the OptiX OSN 3500 supports various networking applications, such as the pure packet mode application, hybrid networking application (overlay networking of the packet mode and TDM mode), and pure TDM mode application. By using a proper networking solution, the data service and conventional SDH service can be processed in the optimal manner.

Technology

The OptiX OSN 3500 transmits voice and data services on the same platform with high efficiency. It integrates the following technologies:

• In packet mode, the OptiX OSN 3500 supports the following technologies:
  • Multiprotocol Label Switching (MPLS)
  • Multiprotocol Label Switching Transport Profile (MPLS-TP)
  • Pseudo Wire Edge to Edge Emulation (ETH PWE3)
  • TDM PWE3
  • ATM PWE3
• In TDM mode, the OptiX OSN 3500 supports the following technologies:
  • Synchronous digital hierarchy (SDH)
  • Plesiochronous digital hierarchy (PDH)
  • Ethernet
  • Asynchronous transfer mode (ATM)
  • Storage area network (SAN)/Video
  • Wavelength division multiplexing (WDM)
  • Digital data network (DDN)
  • Pulse Code Modulation (PCM)

Exterior of the OptiX OSN 3500 

Network Application

As shown in Figure, the OptiX OSN 3500 is mainly used at the convergence layer and backbone layer of the metropolitan area network (MAN). The network application scenarios are described as follows:

• In TDM networking, can be networked with the other OptiX transmission equipment (the OptiX OSN 9560, OptiX OSN 9500, OptiX OSN 7500 II, OptiX OSN 7500, OptiX OSN 3500 II, OptiX OSN 2500, OptiX OSN 1500, OptiX OSN 500, and OptiX OSN 550) to optimize the carrier's investment.
• With the packet switching technology, can constitute a packet data transmission network with the other OptiX transmission equipment (the OptiX OSN 7500 II, OptiX OSN 7500, OptiX OSN 1500, OptiX OSN 500, OptiX OSN 550, OptiX PTN 910, OptiX PTN 950, OptiX PTN 1900, OptiX PTN 3900, and OptiX RTN 900) to meet the requirement for bearing IP services.
• Can be flexibly networked with WDM equipment and Huawei Metro equipment.
• Can transparently transmit services over third-party Layer 2 networks, allowing end-to-end configuration and management.

What’s the Multicast Model

According to the multicast source control level, multicast has three models:

ASM

Any-source multicast (ASM) is defined in RFC 1112. In this model, a recipient, by joining a group identified by the multicast address, 

can receive data sent to the group. A recipient can join or leave a group at any time, and the recipient location or quantity is not limited. 

In addition, any sender can serve as the multicast source to send data to the group. Therefore, this model is applicable to the 

multipoint-to-multipoint (MP2MP) multicast application.

Figure 1 ASM network model 

SFM

As an extension of ASM, source-filtered multicast (SFM) extends the source filtering function of the upper-layer protocol module. 

That is, in the SFM model, whether the multicast data of specified multicast source(s) is allowed to pass can be controlled. Viewed 

from recipients, SFM and ASM are different; but viewed from senders, they are the same. Therefore, SFM is the same as ASM in 

terms of network interoperability.

NOTE: 

The SFM is basically an ASM with a multicast source filtering policy. The basic principles and configurations of ASM and SFM are the 

same. In this manual, both SFM and ASM are called ASM. 

Figure 2 SFM network model 

The following table lists the protocols that support ASM/SSM.

Based on the preceding multicast models, the OLT supports three group filtering modes: ASMSSM, ASM ONLY, and SSM ONLY.

NOTE: 

Only the OLT supports group filtering mode.

In different group filter modes, for the differences in management plane and control plane, see Multi-instance Multicast; for the differences in the forwarding plane, see Forwarding Framework on the Device.

Follow the rules below to select a proper filter mode:

For compatibility with the original VLAN+GMAC, select ASMSSM. 
For strict ASM or SSM message filtering, select ASM ONLY or SSM ONLY. 
For maximum compatibility of various STBs in a home network, select ASMSSM. 
For SIP+GIP forwarding (that is, posing no restrictions on SIP and GIP planning among different ISPs), select SSM ONLY. However, 

the entire network needs to support IGMPv3 for implementing SSM ONLY.

When the group filter mode is ASMSSM, even if the user side does not support IGMPv3, carriers can implement SSM network on the 

network side. The device, with its SSM mapping function (can be supported automatically), can help implement the SSM networking 

on the network side even if the user-side device does not support IGMPv3. With the SSM mapping function, the device maps the received (*, G) message to an (S, G) message 

according to the unique multicast program triplet, as shown in the following figure.

NOTE: 

A multicast user cannot belong to multiple MVLANs at the same time. 
Dynamic programs do not support SSM mapping.

Figure 4 SSM mapping  

The following table describes whether the devices support the SSM and ASM modes.

NOTE: 

Currently the MxU does not support the PIM-SSM.

When the group filter mode is ASM ONLY, SSM mapping is not supported because ASM packets are dropped on the user side. 

For SSM ONLY, it is unnecessary to support SSM mapping.

More blog:

Huawei OLT MA5600T Series Equipment Upgrade Instructions

​MA5600T Series Equipment Aggregate Docking Cisco Equipment

Huawei MA5620 Series Equipment Port Mirror Capture

What’s GPON and Why GPON?

What is GPON?

GPON: Gigabit-capable Passive Optical Network
PON is short for Passive Optical Network ;
GPON architecture: Passive optical network featuring one-to-multiple-point;
Optical Line Terminal (OLT)
Optical Network Unit (ONU)
Optical Distribution Network (ODN).
Why GPON?

GPON supports :
Triple-play service: High-bandwidth up to 1.25Gbps/2.5Gbps
Long-reach up to 20km
HDTV: 16-20M/program;
Data: 10M;
Video Conference: 4.5M
GPON is the choice of large carriers in the international market.

GPON Principle—-Data Multiplexing
GPON adopts Wavelength Division Multiplexing (WDM) technology, facilitating bi-direction communication over a single fiber.

To separate upstream/downstream signals of multiple users over a single fiber, GPON adopts two multiplexing mechanisms:
In downstream direction, data packets are transmitted in a broadcast manner;
In upstream direction, data packets are transmitted in a TDMA manner

GPON Principle—-Downstream

Broadcast mode

GPON Principle—-Upstream

TDMA (Time Division Multiplex Access) mode
Basic Performance Parameters

GPON Network Model Reference

• ONU Optical Network Unit
• ONT Optical Network Terminal
• ODN Optical Distribution Network
• OLT Optical Line Terminal
• WDM Wavelength Division Multiplex Module
• NE Network Element
• SNI Service Node Interface
• UNI User Network Interface

GPON Solution Provider Thunder-link
Thunder-link is a independent GPON solution provider, working with over 500 ISPs and carriers in the world. Thunder-link provides Huawei OLT at very competitive price, Huawei is the world leader in GPON market with 36% marketshare. Full GPON solution (OLT, ODN, ONU) include technical support service are all available at Thunder-link, many ISPs starts their GPON journey by telnet accessing Thunder-link GPON LAB remotely, which is a free service provided by Thunder-link aiming at bridging the digital divide.
Interested in GPON solution price, contact sales@thunder-link.com
Interested in Thunder-link LAB test, contact supports@thunder-link.com

More related:

How To Reset Huawei OLT MA5600T Series Equipment Password

Implementation of TR069 protocol in MA5600 series

Optical attenuation is too large lead to ONU recovery failure

Ethernet Basics_GFP, VCAT, and LCAS-V1.0

Situation When Carry 10GE Traffic On OSN3500 

Huawei Launches the World’s First Fully Outdoor WDM Product

Carrying LTE/LTE-A CPRI services and helping to drive down network costs, making baseband unit cloud a reality
Huawei released the world’s first fully outdoor Wavelength-division multiplexing (WDM) product at a TDC and Huawei joint global WDM/OTN seminar themed ‘Simplified Network for a Better Experience’. Used for carrying LTE/LTE-A common public radio interface (CPRI) services, the product helps drive down the costs of network deployment and operations and maintenance, realizing the baseband unit cloud (BBU Cloud).
In order to reduce site leasing fees and centrally manage base station resources, carriers are beginning to adopt the BBU Cloud as the mainstream networking mode. To date, the baseband units (BBUs) have been collectively deployed in the integrated central office, and remote radio units deployed at the coverage points. The BBUs then work with the remote radio units through CPRIs to extend the service transmission distance. Usually, the CPRI services are transmitted through connected optical fibers. This type of networking mode consumes optical fiber resources and has low reliability. In addition, there are no supervisory measures for managing fibers, making maintenance difficult.
The fully outdoor Huawei WDM product replaces optical fiber connections with WDM technology. This results in a pair of optical fibers able to withstand more than 100 pairs of CPRI services. Also, the Huawei product reduces network investment and shortens service deployment time, providing a highly reliable network by using a unique delay compensation technology. The product also supports remote performance monitoring and uses a network management system to precisely locate faults. To ensure it is suitable for outdoor use it has a compatible design, supporting 614 Mbit/s to 9.8 Gbit/s (CPRI1-CPRI7) service on the client side. This specific design provides a product suitable for covering high-density and large-capacity metropolitan areas.
Huawei WDM/OTN series end-to-end intelligent optical transport platforms are applicable to the backbone core layer, metropolitan core layer, metropolitan aggregation layer, and metropolitan edge access layer. Thunder-link.com wholesales Huawei WDM products, include Huawei OSN 6800, Huawei OSN 8800. Get the best price Huawei WDM products from Thunder-link.com, ships to worldwide.
As world famous Huawei product supplier – Thunder-link.com, focuses on Huawei products and solutions, we are very experienced in this area. Most Huawei products are complicated, technical support may required at any phase of project, work with a professional supplier like Thunder-link will make your project secured.
It’s referenced from:
http://pr.huawei.com/en/news/hw-427431-cpri.htm#.VUw29iKUcUg