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Originally Posted by ntluser
I retained my BT number when I switched to NTL and paid a £20 porting charge, which I understood to be the cost for linking BT equipment in the local exchange to NTL equipment in such a way that my calls are received on BT equipment in the exchange abd tranferred across to be dealt with by NTL equipment.
Given that the BT equipment can pick up Caller ID, why is it not possible for that information to be passed to the NTL equipment and on to the customer?
I understand that the problem arises from the kind of switches used. Is it not possible to have certain parts of NTL areas to be upgraded with a long term view of upgrading the rest when finances permit?
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What actually happens is that the call is automatically routed from BT to NTL at the local exchange as any call to NTL would be.
The CallerID information is passed on to NTL by BT. What happens then is it gets routed through the NTL equipment to your local street cabinet via optic fibre where it then gets sent to your house via wire. If any of that equipment does not support CalllerID then that does not arrive at your phone.
Certian parts of NTL support CallerID in whole, certain parts partially and some not at all. As the older equipemnt dies it will be upgraded with newer stuff that will probably support CallerID so it will take a long time to upgrade everybody.