As others in the thread have hinted at, this is because TalkTalk, as
with most other cheap LCR providers, use GSM Gateways to make calls
directly over the Mobile networks, instead of routing the calls to the
mobile providers official interconnects (which usually incur costly
BT or other Telco charges).
It is worth noting the recent, yet surprisingly unpublicised, news
that such gateways have been banned:
http://www.fcs.org.uk/news/press/2003/240703.asp
Id be interested if anyone has actually seen any LCR providers
actually pulling their gateways due to this DTI move.
jgfrancis@cix.compulink.co.uk wrote in message
news:...
> Having recently switched from BT to TalkTalk for my calls, I now find that
> caller display does not work when calling mobiles. TalkTalk say this is so
> they can offer cheaper call rates. Is this correct?
>
> Thanks,
> Julian