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Optical Fiber Line Auto Switch Protection System

Product Details

System Description

OLP (Optical Fiber Line Auto Switch Protection System) is a product that used in the protection of optical transmission line, it can realize optical power real-time monitoring and automatic optical fiber line switching.

In optical transmission network, the OLP monitor the optical power of the Primary and Secondary fiber in real time. When the Primary is accidentally broken or the performance is degraded, the OLP will automatically switch the working channel from Primary to Secondary to realize the protection of optical fiber line.

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Advantages

Working in the optical layer, transparent transmission to optical signals.

High optical performance.

Carrier grade switching speed.

Support dual power supplies for redundancy.

Support NMS for unified OAM.

Applications

Optical fiber line auto switch protection.

Real-time monitoring of fiber quality by optical power.

Emergency dispatching of working routes.


Equipment Types

Compact OLP (1U compact type)


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Pluggable OLP (1/2/4U pluggable type)


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Diagram

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1+1

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1:1

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1-1


Compact OLP

Features

Low cost OLP solution.

1U compact size for easy deployment.

Support panel key control with LCD display.

Support 1+1, 1:1, 1-1 three kinds of protection methods.

Outline

Front

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Back

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1:   LCD Display

2:  LAN and RS-232 interface: management interface

· LAN: RJ-45 connector

· RS-232: DB9 male connector

3:  Indicated LED  

LED

Indication

Descriptions

Power1

Power2

Power Supply status

On: Power on

Off: Power off

Run

Equipment running status

Flashes 1 time/second

Auto

Working mode status

On: Auto mode

Off: Manual mode

Pri, Sec

Working channel status

Pri on: Working on Primary Channel

Sec on: Working on Secondary Channel

R1

RX level status of Primary channel

Green: normal (the RX level is higher than the switching threshold)

Red: Alarm (the RX level is lower than the switching threshold)

R2

RX level status of Secondary channel

Green: normal (the RX level is higher than the switching threshold)

Red: Alarm (the RX level is lower than the switching threshold)

TX

Connection status between OLP and transmission equipment

Green: Normal (OLP received optical signal from transmission equipment)

Red: Alarm (OLP do not received optical signal from transmission equipment)

Ls

Working status of internal  Light Source

Green: Normal

Off: Internal  LS is inactive or unassembled

Flash with Green light: RX level is lower than the switching threshold.

(Internal LS is available for 1:1 only, which is used for monitoring standby channel)

Panel key

Enter: Long press to enter or exit the menu. Short press to confirm and save the setting.

▲▼Select the menu.

Exit: Exit the menu.

5:  Optical interface

Port

Connection

TX

Connect to TX port of transmission equipment

RX

Connect to RX port of transmission equipment

T1

Connect to TX port of primary optical fiber

R1

Connect to RX port of primary optical fiber

T2

Connect to TX port of secondary optical fiber

R2

Connect to RX port of secondary optical fiber

interface

6:  -48V DC connector

7:  220V AC connector

Specifications

Parameters

Unit

1:1

1+1

1-1

Working Wavelength

nm

1310±50nm, 1550±50nm

Optical Power Monitoring Range

dBm

+23 ~ -50

Optical Power Monitoring Accuracy

dB

±0.25

Optical Power Monitoring Resolution

dB

±0.01

Return Loss

dB

55

PDL

dB

0.05

WDL

dB

0.1

Insertion Loss

dB

TX<1.2

RX<1.2

TX<4

RX<1.2

<1.2

Switching Time

ms

<35

<15

<15

Working Life

times

>107

Working Temperature

°C

-10 ~ +60

Storage Temperature

°C

-20 ~ +75°C

Power Supply

V

-48V DC, 220V AC, Support dual PS

Power down Status


Maintain or Switch to backup path

Optical Interface


SC/LC (selectable)

Management Interface


RJ-45, RS-232

Rack Size


19’inch, 1U height


Pluggable OLP

Features

Highly-scalable platform by pluggable design.

High integration, large capacity. (2ch OLP per 0.5U card)

3 types chassis: 1U with 4 slots, 2U with 8slots, 4U with 16 slots.

Optional OTDR test function for fiber OAM.

Optional EDFA to achieve long-haul transmission.


Outline

1U

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2U

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Specifications

General

1) Environmental Condition

Working Temperature: -5°C to +55°C

Humidity:  85% (@ 25°C)

2) Power Supply

Power Supply: -48V/DC±20%   (85-264)V/AC

Power consumption: less than 50W in full configuration.

3) Chassis dimension

Chassis

Dimension (W×D×H)

1U

483×240×44mm

2U

483×240×89mm

4U

483×240×176mm

Power Unit (PWU)

Outline:

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AC Card (1U height)                DC Card (0.5U height)

Specifications:

AC Input           :   85-264V/AC

DC Input           :   -48V/DC ± 20%

 Network Management Unit (NMU)

Outline:

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Specifications:

Ethernet Port        :   10/100Mbps (RJ-45)

Console           :   for debugging only.

Optical Line Protection Card (OLP)

Outline:

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Specifications:

Parameters

Unit

1:1

1+1

1-1

Working Wavelength

nm

1310±50nm, 1550±50nm

Optical Power Monitoring Range

dBm

+23 ~ -50

Optical Power Monitoring Accuracy

dB

±0.25

Optical Power Monitoring Resolution

dB

±0.01

Switching Time

ms

<35

<15

<15

Insertion Loss

dB

TX<1.2

RX<1.2

TX<4

RX<1.2

<1.2

Return Loss

dB

55

Power down Status


Maintain or Switch to backup path

Optical Interface


LC/UPC

Channels


Max.2 per card


Working Parameters

Working Mode

Auto mode: The channels are switch automatically according to the switching threshold.

Manual mode: The channels are switch by setting manually.

OLP support Manual mode auto-return to Auto mode. In a certain period of time, if the OLP does not have any manual operation, Manual mode will automatically return to Auto mode. The factory default setting is 30 minutes. The available value is 1 to 999 minutes. Auto-return function is disabled if the value is set to 0.

Notes: The OLP equipment should be working on Auto mode after operation completed for preventing protection failure.

Working Channel

OLP will select the working channel automatically according to the optical line status while working under Auto mode.

Working channel can be selected manually by panel key, commands or NMS . While switching the working channel, the Working Mode will be changed to Manual automatically.

Working Wavelength

1310nm or 1550nm can be selected as working wavelength.

witching Threshold

The factory default setting of switching threshold is -30dBm.

In case the optical power of Primary channel is lower than the threshold, OLP will switch the working channel to Secondary.

Switching Delay

Delay switching and Non-delay switching can be seleted in Auto working mode.

Delay switching: In case the optical power of Primary channel is lower than the threshold, OLP will switch the working channel to Secondary channel after MM=1~999seconds delay.

Non-Delay switching: In case the optical power of Primary channel is lower than the threshold, OLP will switch the working channel to Secondary channel immediately.

Working Channel Auto-Switching back

Auto Switching Back or Non-auto Switching Back can be selected.

In Auto switching back, while the primary optical line recover, OLP will switch the working channel from Secondary back to Primary automatically. In this mode, delay can be set from 1 to 999 minutes.

But in Non-auto switching back, the working channel will be maintain in the Secondary channel, even if the Primary channel has recovered.


Engineering Connection Diagram


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Network Management System

The OLP network management system can realize unified management and control of all OLP equipment.

 

Features:

Support Windows OS.

Web-based access, friendly operation.

GIS platform for visualized management and location.

 

Functions:

System Management.

Equipment Management.

GIS Topology Management

OLP Management

OTDR Test Management

Alarm Management

Report Management

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