Re: Sonet/SDHYour questions raises a good topic for discussion. How resilient SDH/Sonet as a technology it is.
I have graduated in 2000 from the university and since then SDH was a dying technology, and actually SDH is still around strong in many places.
I think finally we reached the point the SDH deployment will be irrelevant.
Some carriers that I work with do not buy SDH anymore, only for some small port/board expansions in order to keep some past investments in the network.
For new networks, either MPLS-TP or IP MPLS are chosen, be it the backhaul, aggregation layer or metro networks.
I supposesoon the competition in the Metro will be between OTN to the edge and corrent MPLS-TP and IP MPLS technologies....
Re: Reminder of timescalesThis is quite true. My rule of thumb is to come up with the most reasonable and well-researched estimate of a time-frame for technology adoption ... and then multiply that duration x2.
Reminder of timescalesThis is a very real reminder, as everyone talks about the potential of transport SDN, about how long it takes for concepts to become mature enough for deployment and then for the market to reach a point of momentum. Packet-Optical and 100G were topics being discussed in earnest at least six years ago, if I recall correctly...
I have graduated in 2000 from the university and since then SDH was a dying technology, and actually SDH is still around strong in many places.
I think finally we reached the point the SDH deployment will be irrelevant.
Some carriers that I work with do not buy SDH anymore, only for some small port/board expansions in order to keep some past investments in the network.
For new networks, either MPLS-TP or IP MPLS are chosen, be it the backhaul, aggregation layer or metro networks.
I supposesoon the competition in the Metro will be between OTN to the edge and corrent MPLS-TP and IP MPLS technologies....