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The Marriage of IP with OTN/DWDM !

19 June, 2014 by Faisal Khan 40 Comments

When revenue per bit starts falling and cost per bit starts increasing, it’s time to think about alternative strategies to expand Transmission/IP network. As IP is predominant traffic in Transmission networks, therefore any expansion strategy on Transmission should be driven by IP demands. Indeed, both IP and Transmission departments need to work for a joint and synergetic […]

Filed Under: 100G, DWDM, High Speed Transport, IP/MPLS Tagged With: DWDM, IP, IP offload, IP/MPLS, MPLS, OTN, Router offload

What your DWDM vendor did not tell you about latency for your Data Center Interconnect

28 September, 2013 by Faisal Khan 36 Comments

  Are you concerned about  latency in your data center links running  over optical network ? Or, are you planning for Data Center Interconnectivity in near future and want to know  the impact of delays involved. The read on, for some useful tips to know your options. Chances are, you are already using DWDM to […]

Filed Under: 100G, ASON GMPLS, Carrier Ethernet, DWDM, High Speed Transport, IP/MPLS, ITU-T, MPLS-TP, OAM, P-OTN, SDN, Uncategorized Tagged With: Data Center Interconnect, Data Center Interconnectivity, DCI, Latency DWDM

Need for OSNR Testers for Pol Mux Modulations

27 January, 2013 by Faisal Khan 6 Comments

OSNR ( Optical Signal to Noise Ratio)  is a critical and important parameter in high speed DWDM links. If OSNR is not good it will seriously affect the distance reachability in DWDM systems before regeneration is required. OSNR testing is typically done with OSA (Optical Spectrum Analyzer).  There are standard test sets available to test […]

Filed Under: 100G, DWDM, High Speed Transport Tagged With: DP, OSA, OSNR, Pol Mux

Soft Decision FEC ( SD FEC) versus Hard Decision FEC

26 January, 2013 by Faisal Khan 4 Comments

As data rates increase beyond 10G, the requirements for OSNR become stringent. This is because the advanced modulation techniques used at higher bit rates require higher OSNR performance. Low OSNR is directly related to poor BER performance in DWDM networks. FEC or Forward error connection is a method used to achieve coding gain for higher […]

Filed Under: 100G, DWDM, High Speed Transport Tagged With: BER, EFEC, Hard Decision FEC, Soft Decsion FEC

Optical ASON or Electrical ASON!

22 January, 2013 by Faisal Khan 18 Comments

The debate still lingers on. When it comes to protection and re-routing  on High speed links, what is the benefit of using Optical ASON versus Electrical ASON. The Optical ASON relates to lambda switching ( Also called WSON-Wavelength Switched Optical Network). This necessitates the need of using at  minimum Multi degree and directionless functionality. Using colorless […]

Filed Under: 100G, ASON GMPLS, DWDM, High Speed Transport Tagged With: 100G, ASON, GMPLS, High Speed, WSON

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