More on Telkom's "in-home" FTTH cable
Markings on the cable. All I can make out is Telkom FTTH.
Thanks for that added pic !
My guess is that the first two markings could be "TELKOM CBI", referring to the range of fibre optic cables produced by CBI / Aberdare and fleetingly described
here.
The text a bit further along could be G.657A2, a reference to the ITU-T G.657 A2 cable standard which CBI describes as "bend-insensitive single mode fibre".
Edit: Yup, it's confirmed, that cable is indeed made by CBI/Aberdare for Telkom. According to CBI, it's a "dual-purpose" cable, intended for both aerial and ducted installation.
For those interested in the technicalities, a PDF datasheet is attached, from which the following pic was snipped:
( One hopes that CBI counts fibres more accurately during production than they do when drawing up a datasheet

)
Here are some technical highlights :
- It operates in the 1.3µm to 1.6µm range (infra-red).
- Operating temperature range is -10°C to +70°C.
- The outer sheath is UV-stabilised, so in theory it is fine for long-term outdoor exposure in full sunlight.
- The yellow fibres are indeed Aramid (as reported by biena), of which Du Pont's "Kevlar" is the most well-known example.
- The clear inner sub-duct is indeed polycarbonate (plastic).
- The minimum recommended bend radius (long-term)is in fact 48mm - even gentler than the 40mm I estimated! In the short term, bends down to 38mm can be tolerated.
- Maximum permissible pull-strain is 25kg (during installation) and 10kg (permanent).
- It's rated to survive 35 bend cycles.
According to CBI, this "dual-purpose" cable has been phased out in favour of two different cables that are "optimised" for the two different types of Telkom installation.
PS: If you're interested, have fun reading up on the interesting properties of "thixotropic gels".