[Asterisk-Users] Question on callingpres and blocked numbers

[Kevin P. Fleming]

Kevin Bockman wrote:

> This is just a feature of PRI service.  Of course all of the call info 
> is still available even if you 'block' it.  The call still has to be 
> traceable.  Magic huh?  I thought that was cool too the first time I 
> found out about it.

It depends on whether you are purchasing retail or wholesale service (at 
least it is supposed to), retail meaning 'end user' and wholesale 
meaning 'carrier'. The presumption is that an end user can't be trusted 
to suppress the information just because the flag is set requesting them 
to do so, so their upstream provider actually removes the information 
but leaves the 'restricted' flag turned on so that the recipient knows 
why the information is not there.

A 'carrier' customer is expected to provide the same service for their 
end-user customers, and pass along the data unmodified to other carrier 
customers.