Quote:
Originally Posted by weesteev
The VHUB acts as a multiplexer, condensing down up to 3000 subscribers into trunks of 16f back to a headend/hubsite. All CMTS and broadcast equipment is still in the technical sites, the VHUB is just acting like a massive collector node/amplifier.
The star topology you refer to was the ex-Telewest network (point to point PDH generally) while the NTL network is generally built on fibre rings (redundant SDH).
HTH
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Interesting stuff. I remember SDH being mentioned now in fact, but being about 15 at the time, those details were lost on me. I guess it's like having a ring main. I did wonder why there were so few lasers compared to nodes in the field.
National network used the ATM protocol, (which I assume is now probably MPLS based).
The Arris (for example) VHub PDFs online mention the use of DWDM feeds - I remember hearing that being spoken about in 1999/2000, as well as discussions about multimode vs single mode fibre. All the stuff in use was single mode I think. I guess this stuff has been converging for years.