If you had put the (or a) link here, or a brief snippet of the definition of TIEV, I, and perhaps others, could also have profited from your Googling skills. ;-)
I suppose this is OT, but I'm not marking it as such.
For such a simple search it's obvious the OP hasn't bothered to do anything for himself. Just expects the answer on a plate. Which no doubt would be copied in to homework answers.
Sorry if you think I'm cynical.
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The reports of my death are greatly exaggerated.
Ok, after my last post I did some looking. Not very good looking, but I spent definitely more than 30 seconds. I found places that would sell me TIEV cable, I found something that indicated that TIEV cable was good for indoor / outdoor use (and, iiuc, usually used as the "incomer" cable from the telcos terminal block to inside your house, it is available in (at least) 2 conductor and 4 conductor versions, but, in my brief look, I didn't see anything that defined what the "initials" (acronym?) TIEV signified.
(Sometimes I get lucky with google, yesterday I didn't ;-)
If English (well, American) was not my native language, I'm fairly sure I'd have had more trouble.
For the benefit of others, here is the construction spec from that page (and a general statement)--there is other information on that page:
(BTW, the TIEV doesn't seem to be indicative of the insulation, construction, or whatever.)
'
GENERAL
This specification covers the requirements of inside-outside station wire used for direct connection from the outside protector to the subscriber's set.
...
CONSTRUCTION :
Conductor : Solid annealed bare copper wire, 0.50,0.65 mm. (24,22 AWG) in size.
Insulation : Color coded solid high density polyethylene.
Twisted Pairs : The insulated conductors are twisted into pairs triple or quad. The four conductors of the quad shall be twisted into a " Spiral configuration with the red and green conductors diagonally four " opposite each other in the quad.