As core feeder technologies

Written on 3:50 PM by ooe

Most operators are rolling out ADSL systems and are considering the next step ahead. VDSL is considered a realistic future step for the access network. However, all DSL technologies have one major weakness, they require a metro-type transmission network to feed them. Some in the industry are experimenting with new feeder architectures based on PON designs. Current 155 or even 622 Mbit/s systems are not really powerful enough for these core feeder applications but future PONs based on 1.25 Gbit/s and higher seem to be well suited to these applications.

One could visualise an architecture where the access and metro/core networks could be rolled into one and served by powerful PON systems. Studies are already underway to examine the cost implications of such architectures and if successful, these could pave the way for the introduction of the technology in a much shorter timescale than would otherwise be possible. These systems would need greater split ratios and much longer reach than current PON technology would allow.