Isabelle Meschi (asker) Jun 29, 2016:

Thanks to you both for your explanations!

Tony M Jun 28, 2016:

@ Asker I agree 100% with Daryo's explanation below; the idea of 'terminated' here is not, I believe, the usual one of 'disconnection', but rather in the FR sense of 'conclure (un contrat, ...)'

Daryo Jun 27, 2016:

what this means is that sometimes when you call say a UK mobile from a UK landline, the call is routed through some foreign networks (that belong or are partners to some cheap calls provider) before getting to the called UK number //the "gateway" should be the point where the call leaves the terrestrial telephone network and connects to the mobile network.

What they are basically promising is that your call is not going to circle twice the Earth using the cheapest links available before getting back to the same country to finally connect you to the called number.

That's how I understand it i.e. "terminated to XYZ" meaning the "terminus"/the final link being a link to XYZ

Tony M Jun 27, 2016:

@ Asker Your parsing it wrongly, I think — you need to read it as 'are not terminated' and 'over international gateways'.
Not quite sure what the technical term 'terminated' means here, but it ought to be easy enough to research.
Usually in telecoms, 'to terminate a call' means 'to disconnect it' — but some cursory Google research suggest that there may be a bit more too it than that where mobile calls are involved.