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Many companies have deployed n*10Gig between sites and data centers. To maximise the use of fibre they have often deployed 32, 40 or 48 channel mux's and used pluggable transceivers into their switch/routers as required.
But what do you do when these mux's reach capacity but you need more bandwidth?
The options available will include:
- Rent more fibre
- Upgrade to 100Gig
- Extend the mux and add new 10G services
Renting more fibre could be very expensive and adding 100Gig to your switch/routers may require an expensive upgrade and installation of new devices. Never an easy or cheap thing to do and maybe your switch vendor doesn't support 100Gbit?
A third option is to extend the 40 or 48 channel mux to 88 or 96 channel mux and add more 10Gig channels. However, once you edge toward the end of the C or L band spectrum, you can become limited in terms of availability of pluggable transceivers.
The last thing anyone wants to do is throw away anything and look to simply expand on what you currently use. Whilst mux's are relatively cheap compared to other system components, the investment you've made in 80 channel or so 10Gbit 100GHz transceivers, costing maybe in excess of EURO 100.000 is another matter.
You could retain those existing 10Gbit optics and with the addition of an interleaver and shifted 48 mux to extend the 40 channel mux and also the life of your network. You'd need to start using 50GHz 10Gbits optics - but these generally only costs a small amount on comparison.
Expanding the mux with additional channels will ensure you minimise your CAPEX costs whilst ensuring you meet the demands of an ever growing network.
Cube Optics - As always keeping the network simple.