1. Equipment structure and functional description

Equipment Composition

Equipment Overview

This manual is19Inch rack type2.5G FECBidirectional converter（UFEC16）Instructions for using the device. This device integratesFEC（Forward error correction）Encoding and decoding functions, it is a device withFECA bidirectional forwarding device with encoding and decoding functions, specifically designed forSDH STM-16/ SONET OC-48The optical transmission system improves the signal-to-noise ratio and increases the power budget of the line, achievingThe purpose of increasing the transmission distance of the line. At the same time, relevant suppression technologies can be set up internally according to the actual line situation, in coordination withEDFAApplication, support22dBmHigh power output.

The device provides user side and line side transceiver interfaces, as well as remote management interfaces that support Ethernet portsRS-232Management interface.

Equipment Composition

2.5G FECThe front panel of the bidirectional converter device is shown in the figure1 As shown, the rear panel is as shown in the figure2 As shown.

Front panel schematic diagram

picture1 Schematic diagram of the front panel of the equipment

On the front panel from left to right are: product name, power switch, status indicator light, user side input light port, user

side

Output optical port, line side input optical port, and line side output optical port. The optical interface adoptsFC/PCForm.

Rear panel schematic diagram

picture2 Schematic diagram of the rear panel of the device

On the back panel, from left to right:HouseKeeeping Interface, Ethernet management interfaceRS-232 Management interfacePower fuse tubeADual power input interface, power fuse tubeBAnd the protective grounding terminal.

Panel Description

optical interface

outside1 Fiber optic interface

power interface

The power input interface adoptsP4The socket interface form and pin definitions are as follows:

picture 3 Power connectionopeningshowmeaningpicture

outside 2（From left to right, they areA1、A2、B1、B2On the far right is the grounding terminal）：

Note: Supports dual power input,A1、A2For a set of power sources;B1、B2For another set of power sources.

pilot lamp

The status indication on the panel is divided into two parts: the user side and the line side, with the same alarm status quantity on both sides. outside3Definition of indicator lights

RS232 communication interface

RS-232The interface adoptsRJ-45The form and pin definitions are as follows: Table4Serial port definition

Baud rate115200 bps

8 bits transmit

No checksum

HouseKeeping Switch alarm interface(Disconnect normally, connect in case of alarm)）

HouseKeepingThe interface adoptsRJ-45The form and pin definitions are as follows: Table5：

Ethernet communication interface

pass throughUDPProtocol for network monitoring. The definition of network port pins is as follows:

outside6：

2. Main performance indicators and specifications

Mechanical dimensions

L × W × H＝483mm × 200mm × 44mm

working conditions

Environmental temperature:0～＋50℃

Relative humidity:5~85%RH（＋25℃）Atmospheric pressure:70～106Kpa

Environmental air: No corrosive or solvent gases, no dust, and no strong electromagnetic field interference in the vicinity. Power supply conditions:- 48Vdirect-current

Voltage range:- 40V～- 57V

Power consumption: less than15W

Main performance indicators

outside7User side optical port indicators

outside8: Line side optical port indicators（FEC OFF）

explain: 1Ordinary typeFEC（support17dBmFiber input power）；

2High power typeFEC（support22dBmFiber input power）.

outside 9: Encoding gain（T=25℃，STM-16，PRBS 223-1 Payload，FEC ON）：

3. Equipment installation and activation

Unpacking inspection

Open the packaging box and compare with the table9Please confirm that the listed materials are in the packaging box. If there are any defects, please contact us promptly. outside10 List of main materials for supply:

Installation steps

After removing the device, place it steadily on a horizontal desktop or fix it on a rack;

Fasten the nuts of the two sets of screws that fix the equipment onto the ear holes on both sides of the rack, and then thread the bolts through the ear holes of the equipment and the rack

Earholes, finally riveted together with nuts;

Connect the blue wires of the power cord separately-48V（negative electrode）The black wire is connected to 0V（positive electrode）Above, the yellow green line represents the protected areaConnecting line.

Place the power switch in“on”Status: Observe whether the indicator lights on the panel are correct. At this pointpower（green light）Light up,get rid of2 individual

FailOther status indicators besides the indicator light(red light)Should be in a glowing state;

Remove the protective cap on the user side optical interface and confirm that the signal light power from the optical transceiver is within the receiving range of the optical interface on the device

After entering, input the optical signal. If the signal is correct, at this time, on the panelClientAll relevant alarm indicators should be turned off. Send the line

The optical signal at the emitting end is connected towards the direction of the line. ifLine RxIf the same encoded optical signal is received from the line, then

Linecorresponding

All status indicators should be turned off. During normal operation, there is only a power indicator light on the panel（green light）Illuminated, all others are in a extinguished state

State.

4. Common problems and solutions

1After turning on, the power does not turn on: Please check if the type of power module used is consistent with the type of power supply you are using, and check if the positive and negative polarities of the power supply are reversed. The power supply used should comply with the power specifications in this manual.

2、MLOSAlarm indicator light on: Check if the input optical power of the corresponding optical interface is in the table7 And table8 Within the defined scope.

3、LOLThe alarm indicator light is on: Please confirm whether the signal rate and frame format output by the optical transceiver are correct.

4、LOF、OOFThe alarm indicator light is on. Please confirm whether the optical power of the corresponding side receiving port is within the defined range, and whether the signal rate and frame format meet the requirements. Confirm if the fiber is connected incorrectly.

5、FailWhen the alarm light is on and cannot work properly, please contact us promptly.

precautions

1Pay attention to the cleanliness of the fiber end face. If the fiber end face is not cleaned, it will affect the product performance.

2Adopting-48VWhen using a DC power supply, do not reverse the polarity of the power supply (product matching power cord: black wire) 0V/grounds,blue line -48VPower supply).

3After the equipment is working, do not look directly at the optical port to avoid eye damage.

4The input optical power of the device's optical port should be within the receiving range of the device's receiver (specific specifications can be found in the product specification book or installation manual).

5Please keep the optical port of the device clean. Please install a protective cover when not in use to prevent dust from falling in.

6Do not allow any objects to enter the device, and do not allow liquids to seep in, in order to avoid damage to the device,And try to avoid using it in the following environments as much as possible:

 Places with direct sunlight or high temperature sources for baking

 Environment with drastic temperature changes

 A dusty or damp place

 Environment with strong electric or magnetic fields

 Places where corrosive gases, flammable and explosive gases, or chemical gases diffuse

7When the device is working normally, please do not open the casing; After the malfunction occurs, please refer to Chapter 4 Common Malfunctions and Troubleshooting for handling. If it still cannot be resolved, please contact us in a timely manner.

8If you encounter the following situations, please immediately cut off the power supply of the equipment and contact us in a timely manner to negotiate a solution:

The equipment has been soaked by rainwater or liquid has entered

The equipment falls from a height or the casing is damaged

The device emits a burnt smell

 The device is not functioning properly

9When the equipment leaves the factory, all parameters have been adjusted. Do not change the settings or adjust the components on the circuit board by yourself.