Original OSN8800 SBM2 TN11SBM2 2-channel CWDM Single-fiber Bi-directional Add/drop Board

Yantai Boxin International Trading Co., Ltd. is a professional comprehensive trading service provider for communication equipment.With warehouses established in Yantai and Hong Kong, we have built a complete and localized network for delivering communication products and services.In 2018, Yantai Boxin International Trading Co., Ltd. set up its international sales department in Yantai, China.Based in China, we operate in emerging markets across Southeast Asia, India, the Middle East, Africa, Europe, and the United States. 

Yantai Boxin International Trading Co., Ltd. supplies products to various telecom operators, meeting their needs for supplementing and expanding 2G/3G/4G/5G network stations.Our current equipment portfolio covers brands such as Nokia, Ericsson, Alcatel, Huawei, ZTE, ZTT, and FiberHome. 

We expand our international market share by offering high-quality products, excellent service, competitive pricing, and timely delivery.Feel free to contact us for more information.

Product Description

1.Product Overview

1.Basic information of the board

Attribute specification description

OptiX OSN 9800 series intelligent optical transmission platform

Board name: 2-channel CWDM single fiber bidirectional optical add/drop multiplexing board

Functional positioning realizes the uplink, downlink, and multiplexing functions of single fiber bidirectional signals with two different wavelength channels in the CWDM system

Type of board: Passive Optical Add/Drop Multiplexing Board (OADM)

Compatible with subracks such as OSN 9800 U series/M series that support TN series cards

Front panel dimensions: height x width x depth: 264.6 mm x 25.4 mm x 220 mm

Weight 0.8 kg

Typical power consumption 0.2 W

Maximum power consumption of 0.3 W (normal operation at maximum ambient temperature)

Working temperature -5°C to+55°C

Key features: 2-channel single fiber bidirectional, CWDM support, must have different upstream and downstream wavelengths, passive design with zero power consumption, cascaded expansion interface

2.Interface and Port Definition

Interface Identification Interface Type Quantity Function Description

LINE LC/UPC 1 single fiber line port, which enables bidirectional signal transmission through a single fiber optic cable

D1/D2 LC/UPC 2 downstream port, separates the designated 2 different wavelengths from the line signal to the local receiver

A1/A2 LC/UPC 2 uplink port, insert 2 different wavelengths of the local transmitter into the line signal

Cascade Interface LC/UPC - Provides cascaded optical interfaces for cascading other single fiber bidirectional OADM boards

3.Core functional characteristics

Functional Module Technical Description System Value

Single fiber bidirectional wavelength uplink and downlink enable the uplink and downlink functions of two different wavelength channels on a single fiber, while the other wavelengths can be directly transmitted without the need for complete wavelength division, allowing for flexible local downlink or insertion of specific wavelength services, saving 50% of fiber resources

The wavelength difference between the up and down channels requires that the signals on the up and down channels must use different wavelengths, which is the core constraint of a single fiber bidirectional system to ensure effective isolation of bidirectional signals in the same fiber and avoid self-excited interference

CWDM supports a full band working wavelength range covering 1271nm~1611nm, and supports all 18 waves of CWDM compatible with all standard CWDM wavelengths, meeting the full band application requirements of coarse wavelength division systems

Cascading expansion capability provides cascaded optical interfaces that can be connected to other single fiber bidirectional OADM boards to achieve channel expansion.It supports smooth expansion from 2 channels to more channels, adapting to network expansion needs

Passive design is mainly based on passive optical devices to achieve functions, with a power consumption of only 0.2W, ultra-high reliability, zero heat generation, and long service life, without the need for additional heat dissipation

Does the optical layer ASON support -

4.Optical performance parameters

Parameter Port/Channel Specification Remarks

The working wavelength range covers all ports from 1271 nm to 1611 nm, covering the entire CWDM band

The insertion loss of the downstream channel LINE-D1/LINE-D2 ≤ 3.0 dB is the loss from the downstream of the line to the local receiver

Channel isolation LINE-D1/LINE-D2 ≥ 30 dB to suppress inter channel crosstalk

On road channel insertion loss A1-LINE/A2-LINE ≤ 3.0 dB Loss from local transmitter on the road to the line

On road channel isolation A1 LINE/A2 LINE ≥ 30 dB suppresses inter channel crosstalk

Direct channel insertion loss Direct path loss ≤ 1.5 dB Direct path loss without upstream and downstream wavelengths

Optical return loss: All ports have an excellent return loss characteristic of>40 dB, reducing reflection

5.Power consumption and mechanical parameters

Parameter specifications

Typical power consumption 0.2 W

Maximum power consumption 0.3 W

Front panel dimensions 264.6 mm (height) x 25.4 mm (width) x 220 mm (depth)

Weight 0.8 kg

Working temperature -5°C to+55°C

The supported system types only support single fiber bidirectional CWDM systems

6.Comparison with TN11CMR2

Features TN11SBM2 TN11CMR2

System type: Single fiber bidirectional CWDM system, dual fiber CWDM system

Up and down rules: The up and down wavelengths must be different.Any two wavelengths have no difference requirement

Fiber optic uses a single fiber optic cable for bidirectional transmission.Two fibers are used for separate transmission and reception

Downstream insertion loss ≤ 3.0 dB ≤ 1.5 dB

Direct insertion loss ≤ 1.5 dB ≤ 1.0 dB

Optical layer ASON support not supported not supported not supported

Applicable scenarios: Access layer with tight fiber resources, conventional CWDM access layer

7.Application scenarios

Core Value of Application Scenario Deployment Method

The access ring with tight fiber optic resources is deployed in the metropolitan access nodes with limited fiber optic resources, using a single fiber to achieve bidirectional business routing and save 50% of fiber optic resources, reducing line leasing costs

Base station forward/backward transmission is on the 5G base station side, using a single fiber optic cable to achieve bidirectional transmission and up/down routing of CPRI/eCPRI services, solving the problem of tight fiber optic resources for base station access, and supporting large-scale 5G deployment

Enterprise dedicated line access is achieved at the enterprise user end with only one fiber optic cable, enabling bidirectional access to dedicated line services and avoiding the need to build a second fiber optic cable, significantly reducing access costs

The cascaded expansion group network connects multiple SBM2 boards through cascaded interfaces, building multi-channel single fiber bidirectional OADM nodes that support smooth expansion of channel numbers to meet business growth needs

Deploying and maximizing the utilization of limited fiber optic pipeline resources in environments where fiber optic pipeline resources are limited, such as subways and tunnels

8.Maintenance and ordering information

Project Information

Component code TN11SBM2

Ordering instructions: When placing an order, it is necessary to confirm the wavelength configuration of the up and down channels, and two different wavelengths must be specified to meet the requirements of single fiber bidirectional

On site operation supports hot plugging, and anti-static wrist straps should be worn during operation.Pay attention to cleaning the fiber optic connectors

Wavelength configuration does not require on-site configuration.According to the wavelength selection at the time of ordering, the corresponding channel of the board has been fixed

If cascade connection needs to expand the number of channels, it is necessary to correctly connect the cascade interface to ensure the correct direction of the optical path

After testing and verifying installation, insertion loss testing, upper and lower channel connectivity testing, and cascading function verification are required

Spare parts management, as a passive component, has high reliability and can appropriately reduce the proportion of spare parts

Core Summary:

TN11SBM2 is a 2-channel single fiber bidirectional CWDM optical add/drop multiplexing board designed specifically for fiber resource constrained scenarios on the OSN 9800 platform.It achieves bidirectional signal transmission on a single fiber based on traditional OADM functionality.

Core values and positioning:

Fiber optic resource savings of 50%: Through single fiber bidirectional technology, signals can be transmitted and received simultaneously on a single fiber, saving 50% of fiber optic resources compared to traditional dual fiber solutions and significantly reducing line leasing costs.

Strict wavelength configuration rules: It is required that the upper and lower signals must use different wavelengths to ensure effective isolation of bidirectional signals in the same optical fiber and avoid self-excited interference.This is the core design requirement of single fiber bidirectional systems.

CWDM full band support: The working wavelength covers 1271nm~1611nm, supporting all 18 wave CWDM systems and fully compatible with the OSN 9800 platform's CWDM full band support capability.

Cascading expansion capability: Provides cascading interfaces that can connect multiple SBM2 boards to achieve smooth expansion of channel numbers, adapting to the gradual expansion needs of the network from 2 channels to 4/6/8 channels.

Zero power consumption and high reliability: Based on passive optical device design, with a power consumption of only 0.2W, it has extremely high reliability and long service life, without the need for heat dissipation considerations.

Technical features:

2-channel single fiber bidirectional up and down capability, requiring different wavelengths for up and down channels

The working wavelength range is 1271-1611nm, covering the entire CWDM band

Up and down path insertion loss ≤ 3.0dB, direct insertion loss ≤ 1.5dB

The isolation degree between the upper and lower channels is ≥ 30dB, ensuring effective isolation of bidirectional signals

Provide cascading interfaces and support multi board cascading expansion

Passive design, power consumption only 0.2W, zero heat generation

Difference from TN11CMR2:

The core difference of TN11SBM2 lies in its single fiber bidirectional technology, which allows for business uplink and downlink on a single fiber, but at the cost of higher insertion loss (≤3.0dB vs ≤1.5dB) and strict wavelength difference requirements (uplink and downlink wavelengths must be different).Choosing TN11SBM2 means sacrificing a small amount of performance in exchange for 50% fiber savings in scenarios where fiber resources are limited.

Application suggestion:

This board is a special OADM component for fiber resource constrained scenarios in the OSN 9800 wavelength division system. It is particularly suitable for scenarios that require saving fiber resources and bidirectional single fiber transmission, such as 5G base station access, restricted areas in fiber optic pipelines, and enterprise dedicated line access with only one fiber optic cable. During deployment, it is necessary to strictly follow the rule that the wavelengths of the up and down channels must be different to ensure the normal operation of the system. For scenarios with sufficient fiber resources, conventional OADM cards such as TN11CMR2 are more cost-effective choices.