Thanks Dieter (and Wikipedia) for that really helpful summary. I will check my cables tonight when I get home as I think they usually have printing on the insulation which will probably tell me what they are
Best wishes

Jonathan Shapero
Sent from my iPhone

On 2 Jan 2018, at 15:26, yahoo@... 1 < Doepfer_a100@yahoogroups.com > wrote:

>> Most network cabling is UTP (Unshielded Twisted Pair), Shielded Twisted
>> Pair (STP) is not very common.
>>
>> STP Cat6 (or Cat5e) is sometimes used in datacenters but I've not seen
>> it elsewhere.
>>
>> Shielded RJ45 connectors have a metal cage, making it easy to recognise:
>>
>>
> https://rubimages-liberty.netdna-ssl.com/hi-res/RJ45-STP-L5E_connector_45deg
> ree.png
>>
>> Martin
>
> Thank's for the note.
>
> I took a look at Wikipedia to learn a bit more about these cables. According
> to Wikipedia it's a bit more complicate and several types of these cables
> are available. One has to distingish between the common shield for all wires
> and the shields for each pair. The shield can be a metal foil (abbreviation
> F) or mesh wire (abbreviation S) or unshielded (abbreviation U). The
> character before the "/" identifies the type of common shield, the first
> character after the "/" identifies the type shield for the pairs of wires,
> e.g.
>
> U/UTP: totally unshielded (not suitable for A-180-9)
>
> S/UTP: common shield for all wires (mesh wire)
> U/FTP: separate shield (foil) for each pair, no common shield
> S/FTP: separate shield (foil) for each pair and common shield (mesh wire)
> F/FTP: separate shield (foil) for each pair and common shield (foil)
>
> All network cables I could find here in Germany (CAT5 or CAT6) had a common
> shield. That's why was not aware that unshielded cables are available at
> all.
>
> For the A-180-9 all cables with common shield are suitable (i.e. S/UTP,
> S/FTP, F/FTP and SF/FTP). Only U/UTP is not suitable for A-180-9. I'm not
> sure if U/FTP will work as it depends upon if and how the single shields are
> wired to the connectors.
>
> Best whishes
> Dieter Doepfer
>
>
>
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