Cisco DWDM Chromatic Dispertion Calculation in CTP\XLS:
- Princiopals of CD
- Measurement of CD
- Manual calculation in XLS
- Automatic Calculation in CTP
This slide deck presents a user case by Microsoft (Mark Filer) for a 100G DWDM alternative to Coherent systems <80km using the PAM-4 approach. Fujitsu (Muhammed Sarwar) and Finisar (Gert Sarlet) present the case for Coherent. Inphi (Radha Nagarajan) and ADVA (Joerg-Peter Elbers) present the case for the PAM-4 approach. IEEE (John D'Ambrosia) weighs in from the standards perspective.
This slide deck presents a user case by Microsoft (Mark Filer) for a 100G DWDM alternative to Coherent systems <80km using the PAM-4 approach. Fujitsu (Muhammed Sarwar) and Finisar (Gert Sarlet) present the case for Coherent. Inphi (Radha Nagarajan) and ADVA (Joerg-Peter Elbers) present the case for the PAM-4 approach. IEEE (John D'Ambrosia) weighs in from the standards perspective.
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Fiber feeds everything
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Nuts and bolts – the components
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This advanced session focuses on deep-dive understanding of the often overlooked Radio Frequency part of designing and deploying a Wireless LAN Network. It discusses 802.11 radio MIMO APs and antennas placements when to use a DAS system antenna patterns. It covers the main environments such as carpeted offices campuses and conference centers, providing feedback based on lessons learned from challenging deployments such as outdoor/stadium/rail deployments and manufacturing areas. Learn More: http://www.cisco.com/go/wireless
Drivers for FTTx
Why fiber
Fiber feeds everything
Flavors of FTTX
Nuts and bolts – the components
Installation techniques
Network design configurations
Machines & Tool
FTTx Roll out /Delivery Mechanism
Outside Plant Fiber Optic Cable
Fibre entering in Building design
Aerial Cable Construction Tool
Spicing Machines & Other Tools
ADVA Optical Networking and Arista Networks Joint OOLS DemoADVA
Check out the slides for Arista Networks and ADVA Optical Networking's joint showcase at OFC 2016. The demo involved a 2000km transmission over an open optical line system with an Arsita switch and ADVA Optical Networking data center interconnect transport.
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Kashif Islam, Solutions Architect , Cisco
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White Paper-Evolution from 10Gbps to 100Gbps for a Metro Network-hsSusmita Adhikari Joshi
Overlaying flourishing 10 Gb/s services with additional co-propagating 10 Gb/s channels in different colors, or wavelengths, is already common practice. Network operators eager to increase capacity have begun overlaying 40 Gb/s channels onto available fiber without leasing more dark fibers as the best pragmatic approach. With the advent of 100G technology, the interest is now shifting from 40G to 100G installations.
We are offering a comprehensive high speed networking solution which is including 3.2T Co-packaged Optic (CPO), 100G, 200G, 400G & 800G transceivers, DACs, AOCs, ACCs & Loopback modules. We are fulfil your research (R&D) stage product development, DVT/EVT pre-product testing, mass production and also for final application use.
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Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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Cisco DWDM Chromatic Dispertion Calculation in CTP\XLS
1. Kayukov Valeriy
Optical System Engineer Step Logic
April 15, 2016
Cisco Optical Networking – Chromatic Dispersion
calculation.
Cisco Support Community
Expert Series Webcast
2. Question1
Have you ever had deal with DWDM
Cisco ONS devices?
1. Yes
2. No
3. Cisco have such platforms?
3. • Chromatic Dispersion
• Measurement of CD in real Fiber
• Sample of calculation in CTP
• Polarization Mode Dispersion
Content of presentation
5. •Chromatic Dispersion (CD) – is based on effect of
impulse broadening during passing through optical fiber.
•Polarization Mode Dispersion - a temporary difference
between the polarization components of the same signal.
Optical Dispersion types:
6. • Optical pulse time-expanded by passing through the
optical fiber. This process triggers limitation of bandwidth
throughput or maximum transition distance with constant
bandwidth.
• Chromatic Dispersion is fiber characteristic with is
measured in ps/km*nm and depends on wavelength.
• To compensate dispersion used pre-compensation and
post-compensation techniques. Dispersion compensators is
based on negative dispersion fiber.
Chromatic Dispersion (CD)
7. Different cables have different CD depending on internal
construction
Typical CD values of different fibers
Fiber type Normal dispersion at 1550 nm
measured in ps/km-nm
Single Mode Fiber (SMF) 17
E-Large Effective area fiber
(ELEAF)
4
TrueWave RS (TW-RS) 4.2
Dispersion shifted fiber (DSF) -0.33
8. • Cisco DCU compensators uses
fiber loops with negative
dispersion fiber.
• Attenuation of DCU varieties
from 2.1db to 8.8 db.
•Compensation Level (ps/nm)
varieties from 100ps/nm to 1950
ps/nm
Cisco ONS 15216 DCU modules
DCU chassis PN:
15216-DCU-SA=
DCU module PN:
15216-DCU-XXXX=
9. Optical spool produced and measured in Thailand,
completed in in hard case in Denmark.
For Sample this DCU has 1950 psnm nominal, but in real
how we see in report it has 1957,33 ps/nm. Insertion loss
6.97db vs 8.8db in data sheet.
What is inside DCU module?
10. •Disadvantage of use DCU in network is that DC add
significant attenuationloss. This is due to difference of
coupling transition and fiber and fiber used in DCU.
• Advantage of use compensators is that DCU limit
nonlinear effects. Different dispersion profile result in a
phase mismatch, witch prevent from FWM happening.
Pluses and minuses of use DCU
11. Values of CD Tolerance XFP:
• Fixed Wavelength XFP
-500 to +1100 ps/nm
• Tunable Wavelenght XFP
-400 to +1300 ps/nm
CD Tolerance of different XFP 10G modules
12. Values of CD Tolerance SFP+:
• Fixed Wavelength XFP
-500 to +1100 ps/nm
• Tunable Wavelenght XFP
-400 to +1300 ps/nm
CD Tolerance of different SFP+ 10G modules
13. • Use of fixed wavelength SFP+XFP has disadvantages in
case failure. Fixed wavelength could be replaced by tunable
module or the SAME wavelength module.
• GLP Price Discount could be higher for tunable modules
that for fixed. Contact to your Cisco CAM.
• In future line DWDM network could be upgraded to
colorless or directionless.
Comparison of SFP+ vs XFP modules
14. Single-Shelf DCU Application
East-to-West and West-to-East
Samples of use DCU modules
Cascaded DCU Shelf per
Direction
DCU Placed Between
Wavelength Selective Switch
(WSS) and Amplifier
16. DWDM network based on 10G services called coherent
networks and networks based on 100G and higher services
called non-coherent networks.
Design coherent networks depends on compensation
systems. Non-coherent networks in most (but not in all)
cases doesn’t depends on compensation systems because
tolerance of recoveries around 94 000 ps/nm for 200G. For
example 94 000ps/nm is equivalent to 5200 km with
18ps/nm-km.
CD Tolerance of 10G, 200G, 400G modules
18. What parameters are measured:
• dispersion coefficient values measured at specified
wavelength
• dispersion maximum over specified range of wavelengths
• zero dispersion wavelength and dispersion slope at this
wavelength
CD measurement, Introduction
19. Both methods measure propagation delay (or group delay) at selected
wavelength and, from the measured delay versus wavelength data, interpolate
the delay for other wavelength not directly measured by using numerical fitting
algorithms.
• Phase Shift – method of comparison of test signal and reference signal used to
modulate the input signal. The phase difference is performed versus wavelength
over the entire wavelength range of source.
• Pulse Delay -
Measurement methods (Phase Shift vs Pulse
Delay )
20. Phase Shift advantages:
high accuracy measurement
high dynamic range (40 db+) (>15 db
higher than the Pulse Delay method)
high measurement reliability
compatible with non-biderectional
components (such EDFA amplifiers)
Phase Shift Method
Phase Shift disentangles:
measurement time can depend on
number of data ponts
requires two units
dispersion versus length info not
provided
Fiber length must be known to calculate
the average CD coefficient
21. Group Delay advantages:
require access to only one end of link
detects regions of different dispersion
within a link? As it can analyze reflections
at intermediate points (only if reflectance
are present mid-span)
Combines an OTDR allowing a
simultaneous distance and loss
measurement
Group Delay Method
Group Delay disentangles:
distance range is limited by the end
reflection: higher reflectance? The longer
distance. Not suitable for APC
connections installed.
Not suitable for long-haul or high-loss
fiber link (>30db)
not compatible with non-biderectional
components (EDFA amplifiers)
24. Need to design network with
requirements:
• 5 sites
• 4 channel 10GE
• fiber used is SMF G652
In this example we will not
consider design of multiplexing,
adddrop and amplification
systems.
Real Sample of Calculation. Planning of DCU
Scheme of compensation in DWDM network
25. In this step we will make:
• Start – “Project Creation Wizard”
• Start – “Run the Network Wizard Now”
• Create circuit – “Create Net Point-to-Point Demand”
• Start – “Network Analyze”
• Go to – “Summary” –> “Optical Reports”
Lets start to work in CTP. Step 1 – Preparation.
28. In this section we will not
cover types of transponders
and so on, just create circuit.
Create Circuits
29. DWDM trunk type we are changing to Tunable SFP+. It is not matter
what type of coding (FECEFECNO-FEC), it doesn’t add any price for
total BOM. Coding (FECEFECNO-FEC) in 10G networks no licensable
by Cisco. After this choice we exactly know CD tolerance of trunk ports.
Edit trunk SFP manually to SFP+ Tunable C
band
30. Report shows per channel CD calculation at the end of
circuit in BOTH directions. Chromatic Dispersion
compensation systems is separate per each direction.
Cisco Transport Planner (CTP) use value 1100ps/nm for
Tunable SFP+, but in data sheet 1300ps/nm. Advantage of
use CTP is that it has fundmargin in reports.
CTP doesn’t use any fiber characteristicfunction of DC
depending on wavelength.
If Residual CD cross CD Robustness (CD tolerance) value
than CTP triggers Single-Channel NLE Status RED. Later will
discus situation with Single-Channel NLE Status RED.
CTP maximum optimally calculates DCU unites. In case of
alarms power EOL , EOS you can manually change DCU to
lower values, in most cases it helps to improve power SOL
value.
Analyze “Optical Report”
31. • Click on Site 1-5,
choose “Layout”
• Click on Site 1-5,
choose
“Functional view”
Lets do that for
every Site and
draw big topology
per each direction
Lets understand what CTP calculated
37. In attach XLS based calculation of DC of Channel
between Site-1 and Site-5
XLS based DC Calculation
Site ID DCU-XXXX CD value Site ID DCU-XXXX CD value Site ID DCU-XXXXCD value Site ID DCU-XXXXCD value
Site-1 none 0 Site-5-B none 0 Site-1 none 0 Site-5-B none 0
Fiber length 85 Fiber length 50 Fiber length 85 Fiber length 50
Fiber CD total 1402,5 Fiber CD total 825 Fiber CD total 1402,5 Fiber CD total 825
CD after fiber 1402,5 CD after fiber 825 CD after fiber 1402,5 CD after fiber 825
Site-2-B 1350 Site-4-A 450 Site-2-B 1350 Site-4-A 450
52,5 375 52,5 375
Fiber length 90 Fiber length 120 Calculation CD in CTP----------> Fiber length 90 Fiber length 120
Fiber CD total 1485 Fiber CD total 1980 Fiber CD total 1485 Fiber CD total 1980
CD after fiber 1537,5 CD after fiber 2355 CD after fiber 1537,5 CD after fiber 2355
Site-3-B 1350 Site-3-A 1350 Site-3-B 1350 Site-3-A 1350
187,5 550 187,5 550
Fiber length 120 455 5 This value calculates CTP Fiber length 120 450 5
Fiber CD total 1980 Fiber length 90 But have to be 455, CTP makes errorFiber CD total 1980 Fiber length 90
CD after fiber 2167,5 Fiber CD total 1485 It add aditional DCU-450 CD after fiber 2167,5 Fiber CD total 1485
Site-4-B 1350 CD after fiber 1940 Site-4-B 1350 CD after fiber 1490
450 Site-2-A 1350 450 Site-2-A 1150
550 590 340 This value calculates CTP 550 340
-182,5 Fiber length 85 But have to be 590, CTP makes error -182,5 Fiber length 85
Fiber length 50 Fiber CD total 1402,5 It add aditional DCU-450 Fiber length 50 Fiber CD total 1402,5
Fiber CD total 825 CD after fiber 1992,5 Fiber CD total 825 CD after fiber 1742,5
CD after fiber 642,5 Site-1-A 1350 CD after fiber 642,5 Site-1-A 1350
Site-5-B 550 642,5 392 This value calculates CTP Site-5-B 550 392,5
92,5 But have to be 642, CTP makes error 92,5
It add aditional DCU-450
38. As result we can see some errors and make some conclutions:
CTP show in layout or doesn’t show correct DCU values on which based DC results in
“Optical Results” report
Be care with CTP, use manual calculation to check, also use Forcing Manager to unlock
and clear CD cache calculation.
Use “Forcing Manager” when you add new circuits in design
Do not make “Over-Compensation” and “Under-Compensation”, try to have CD of signal
all the time in tolerance window. For example tolerance window for SFP+ Tunable from -
100 to 1100 ps/nm
XLS based DC Calculation
41. Polarization Mode Dispersion - a temporary difference between the polarization
components of the same signal.
Example A - optic cable has ideal dimensions of the X-axis and Y -> the same velocity of
propagation.
Example B - optic cable has different dimensions to the X-axis and Y -> propagation
speed is different.
Polarization Mode Dispersion (PMD)
42. Causes of PMD:
• The asymmetry of the core or the internal stress caused by the core during production
• Internal stress caused by the core during the installation of optical cable
Polarization Mode Dispersion (PMD)
Editor's Notes
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Сейчас мы обсудим все базовые положений, термины, единицы измерения после чего мы рассмотрим реализации оптических модулей Cisco.
Сейчас мы обсудим все базовые положений, термины, единицы измерения после чего мы рассмотрим реализации оптических модулей Cisco.