DWDM Equipment-Alcatel 1620.pptx

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DWDM Equipment -Alcatel 1620

Presented by

Saravanakumar C.S

Content Owner: saravanakumarC1 - Unclassified | 16/11/2014

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Topics to be Discussed:

1.Overview of Alcatel 1620

2.Signal Flow diagram

3.Alcatel 1620 Cards.

4.Configuration settings in 1620 Equipment.

Content Owner: saravanakumarC1 - Unclassified | 16/11/2014

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Overview of Alcatel 1620 Equipment

1.Upto 126 channel at 10Gb/s in extended C-Band with 33GHz spacing.

2.Q3 management interface.

3.G.709 Transponder.

4.Enhanced FEC.

5.NRZ,RZ,RZ-DPSK Line modulation.

6.1+N Channel protection.

7.Analogue and Digital PM.

8.2Mb/s UDC via TRBD.

9.Automatic pre-Emphasis Adjustment.

10.Low power/High gain Amplifier.

11.Plug and Play Mechanism.

12.Interface at 10Gb/s compatible with STM-64/10GbE LAN/10GBE WAN.

13.Wet Plant Management.

C1 - Unclassified | 16/11/2014

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1620 Signal Flow Diagram

C1 - Unclassified | 16/11/2014 Content Owner: saravanakumar

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ESCT Card

1.It is designed to support the Equipment controller function and Self controller function.

2.It is incharge of the internal management of the node and dispatches control received by Management system to appropriate board.

3.When the board is located in the Master shelf, both the functionalities are optional and active. If it is at slave shelves(sub rack), only the SC functionalities is provided.

4.Flash memory will be present in the main ESCT Board.


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TRBD Card

1.Transponder receives an input Optical signal, applies error -correcting encoding and transmits the signal in an appropriate optical format for the transmission line at pre-determined wavelength.

2.TRBD is a Bidirectional 3R Transponder supporting from 10.709 Gbps to 11.09 Gbps coloured WDM optical interface.

3.TRBD can support precompenstion,1+n Channel protection and Loop backs.

4.TRBDwxyz naming rule:

*w Sands for Line Interface receiver (0=PIN,1=APD)

*x Stands for Line Interface emitter (1=NRZ, 2=RZ, 5=RZ-DPSK)

*Y stands for client Interface (1=l-64.1;2=S-64.2;4=10GBase-ER)

*z stands for FEC ASIC


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BOFA Card

1. BOFA2000 is a board containing 2 band amplifiers that can be used in each of the 12 sub-bands of the extended C-band.

2 Gain blocks are single-stage erbium doped fibre amplifiers, they provide up to +15dBm output power in a sub-band and can be used to amplify optical signal transmitted in the same direction or the two opposite directions (one direction per BOFA gain block).

3 BOFA2000 output power can be tuned in order to optimise per-channel power.

4. Characteristics :

Minimum output power +6dBm

Tuning Step 0.5dB

Maximum EOL output power +15 dBm

Wavelength range 1530.33 to 1568.57nm


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CMDX card

1.CMDX is a Channel Mux / demux for long haul Terrestrial and submarine links.

2.It multiplexes/demultiplexes 8 or 12 coloured optical signals to a single port connected to BMDX.

3.Each of the input and output port of CMX has a tap coupler and a photo detector to electrically monitor the optical power level.

4.It have additional tap at the output for external optical monitoring (For OSA).

5.Input port of the CDX has a tap coupler and a photo detector to electrically Monitor the optical power level. Detected at the demultiplexer input.


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BMDX Card

1.BMDX contains 12:1 Multiplexer and a 1:12 demultiplexer.

2.12:1 Multiplexer is used to multiplex twelve signal inputs into one composite WDM output and the 1:12 demultiplexer is used to demultiplex the composite signal into twelve output.

3. 3.Each of the input and output port of BMX has a tap coupler and a photo detector to monitor the optical power level.

4.Input port of the BDX has a tap coupler and a photo detector to Monitor the optical power level. Detected at the demultiplexer input.


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ALCT Card

1.ALCT card is to load the system(Optical spectrum).

2.ALCT unit is equipped with one laser and which is tuneable.

3.In Function with the line performances, More than one ALCT channel can be required implying to use different wavelength.

4.ALCT laser is tuneable from 191.150 to 195.900THz with a 50Ghz step.

5.Parameters:

*Maximum Optical output power:11dBm.

* Output power tuning step in loading mode:0.25dBm.


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OCPU 2102 Card

1.Provides an Optical splitter for each channel , with front panel MU/SPC connector.

2.Provides the 2:1 selector switch for each channel with front panel MU/SPC connector.

3.For Each switch it receives switch control pulses from the PSCU1 via the backplane protection slot interface.

4.For Each switch, Provides switch position indication to the PSCU1 via the backplane protection slot interface.

5.Provides a standard spider interface for unit management.


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OCPU 1051 Card

1. OCPU1051:It is the 1:32 selector switch or the 32:1 bridge switch depending on the direction used.

2. At the receiving end ,

Passes the protection channel to the correct tributary 2:1 selector switch.

Provides a 1 to 32 way Optical switch with front panel MU connector.

3. At the Transmitting end

Selects the signal to be transmitted on the protection channel.

Provides a 32 to 1 way Optical switch with Front Panel MU/SPC connector.

Accepts Switch setting commands from co-located PSCU1 via the Backplane Protection Bus interface.

Sends Switch status information to the co-located PSCU1 via the Backplane Protection Bus interface.


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LOFA card

1.Lofa card consists of an Optical amplifier module (Based on EDFA)

2.Fuction of the card is to amplify the aggregate path signal at both transmit and receive sides.

3.This unit is optically pumped by two external 980nm pump modules that ensures pump redundancy without impacting the traffic.

4.Output Power is held at a fixed value through a regulation process which involves the two external pumps.


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LSIU Card

1.It receives messages from the software to be routed to the

submerged plant.

2. LSIU formats these messages into the appropriate format for the submerged plant.

3.Messages is used to modulate the bias current of the 1453nm laser contained within this unit, thus modulating the optical output of the laser.

4.The modulated optical output from this unit is sent to the Line Supervisory Gain Cell Unit.


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LSGC Card

1. It receive two optical input signals; an aggregate optical signal in the 1550nm transmission band from the LOFA21yz and the optical Transmit Supervisory signal (at a wavelength of 1453 nm ) from the Line Supervisory Interface Unit

2.Two optical signals are selectively coupled and both signals are routed through a length of NDSF fibre.

3.By virtue of the Raman effect, some of the optical power at 1453nm containing the supervisory signal is transferred into the 1550nm band by Raman effect amplifying the aggregate signal to line and thus superimposing the supervisory signal.

4. After the NDSF fibre the 1550nm band aggregate transmission signal and the unconverted supervisory signal at 1453nm are selectively demultiplexed and both are made available at the unit front panel for further routing.

5.Proportion of the output signal in the 1550nm transmission window is ’tapped’ from the main signal and is available at the front panel for further routing.


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PSCU 1000Card

1. It is required in each shelf that contains units involved in protection and acts as an interface between the protection system controller (PSCU2) and units within the shelf involved in protection.

2. It performs the following functions.

Collects alarm information via the Protection Slot Interface from the transponders (TRBD) and the protection amplifiers (BOFA), passes it on request to the protection system controller (PSCU2).

Monitors positions of the channel selectors (OCPU2102) via the Protection Slot.

Sends the commands to the switches (OCPU2 and OCPU1s) from PSCU2.

Receives switch coordination protocol messages (APS messages) from the PSCU2 and passes them to the appropriate protecting transponder.

Collects switch coordination protocol messages (APS messages) from the protecting transponder ,then passes them on request to the PSCU2.


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PSCU 2000Card

1.PSCU2 is the centralised controller.

2.Receives operator commands , collects transponder and BOFA alarm information from the PSCU1s and based on the operating modes in force, determines what switching actions to perform. Switch commands are sent to the PSCU1s, where they are passed on to the relevant OCPUs.

3.Co-ordinate its activities with its partner PSCU2 at the far end of the link, the PSCU2s exchange information using the APS channel carried in the overhead of the protection channel.

4. PSCU2 sends the co-ordination messages to the PSCU1 in the shelf of the protection transponder for this protection group.

5. PSCU1 passes the co-ordination message to the transponder. It also collects the incoming co-ordination message from the PSCU1.


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Remaining Cards• HSKU Card: Allows the user to manage some electrical relays and opto-couplers

through CT/NMS in order to command remotely some devices external to the 1620 LM NE.

• RAIU1000: monitors the rack alarms to light ON or OFF the lamps of the TRU (URG/NURG/ATTD). It is equipped in each shelf to collect information on the alarms raised in the same shelf.

• PSUP 1000 Card: boards work in 1+1 protection and they are both active at the same time, supplying the units in the sub rack with nominal -48V, 3V and 5V. It has an acceptance range of –40.5V to -57.0V.

Each card is able to provide from the main powering, by means an internal DC/DC converter, the required power supply.

• FANS1000 :Equipped with 3 fans, the unit is located at the bottom of each 1620 LM shelf, allowing to regulate the board temperature.

Grid must be periodically cleaned from dust.

• FANS are monitored via the SPI bus and some direct wires are sent to the HSKU and the RAIU boards to monitor a possible failure of the cooling system.

• In case of failure of a fan, the speed of the remaining fans increases to its maximum value.


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Main Shelf:


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Shelf:


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Channel Cabling for 1620 LM Regional


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Measurement of Board Through NMS


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XFP Configuration


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Loop Back testing operation1.Local Loopback: Applied on OGPI port and normally the option is disabled.2.Remote Loopback: Applied on OCHa port and the option is normally enabled.


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Protection group creation operation:

1.Create and Delete PG: It is used to create the protection group.2.Modify PU is to add or remove protecting and protected card.3.PG Command option is used to Lockout , force switch,Manual switch and clear WTR.


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Protection unit Creation Window


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PG Command Window


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Thank You....


DWDM Equipment-Alcatel 1620.pptx

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