Where has any PlusNet customer complained?
You too are believing the myth that traffic prioritisation is bad, and making the huge assumption that other ISPs do not also practice it. PlusNet put out a huge amount of information about their network. Most others, including BT/Sky/TalkTalk almost zilch.
Can you show us any such graphs from any other major ISP, showing the absence of any heavy loading? If not, the criticism is null and void.
"We don't traffic manage, slow you down, or ever ever suffer from congestion. Just believe us - sucker!"
Ah, no! They don't say the bit about no congestion.
No doubt like all of us you believe Zen to be a good but pricy ISP? So what about this? :-
Class of Service
Traffic is managed across the network by assigning applications to traffic classes. Zen�s IP VPN solution offers six Classes of Service (CoS) with each having its own level of service priority and associated Service Level Agreement (SLA). Applications are
typically allocated as follows:
Class Service Priority and Applications
1 IP telephony
2 Video Conferencing / Media Streaming / Business Critical Applications
3 VoIP call signalling and Business Critical Application, e.g. Citrix
4 Business Critical Application, e.g. SAP
5 Business Critical Application / Bulk Data Transfer
6 Standard traffic, e.g. email / Internet traffic etc
Looks remarkably like
PlusNet's classifications to me

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My broadband basic info/help site - www.robertos.me.uk |
Domains,website and mail hosting - Tsohost.
Connection - Plusnet UnLim Fibre (FTTC). Sync ~ 51.8/16.8Mbps @ 600m. -
BQM
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.