Any idea how this is done ?

[akg]

there is an IVRS based application , and in that ,caller id information is a must . they(client) say that they need the caller id information even if it is blocked , and companies like **broken link removed** have this ability .
AFAIK, the CLIP info is send by the telecom company , then how can be the above statment be true?

 

[suicidalmonkey]

In Australia some organisations, such as government and emergeny services, have the ability to view caller ID information even if it is blocked. I assume this would also be the case in other countries.
The likely hood of a telecomunications company selling a device that can read blocked caller ID information to civillians is extremely remote.

 

[akg]

thanks 'suicidalmonkey' . but my question is , it is the telecom company who blocks/unblocks the facility , and by adding an 'instrument' how can we overcome it?.
as far as i understand , to emergency/govt: lines clip is not blocked,eventhough the party requested not to reveal his id. right?

 

[Nigel Goodwin]

thanks 'suicidalmonkey' . but my question is , it is the telecom company who blocks/unblocks the facility , and by adding an 'instrument' how can we overcome it?.
as far as i understand , to emergency/govt: lines clip is not blocked,eventhough the party requested not to reveal his id. right?

As already explained, you can't add something - the Police merely request the details from the telecoms company, they still have the caller ID logged, it's just not sent on to the public.