[Freeswitch-users] CLIR on SIP

[David Knell]

Brian West wrote:
> It will always contain the number.  Its the far ends responsibility to  
> honor the privacy flags.  The same happens on a PRI as far as I have  
> seen.  Nobody should have the ability to withhold that info from your  
> "switch".
>   
That's not quite the case.  In the good old world, there was generally a 
fairly clear
distinction between users and carriers.  Caller ID would be passed 
between carriers
with the privacy flags set or not as required, but, if it had been 
withheld by a caller,
would not then be delivered to the end user.  Otherwise you're 
essentially giving it
to the end user and asking them not to peek, which isn't terribly secure.

Nowadays, if I want to withhold my CLI, I don't send anything.  That 
works pretty
well.  Don't put junk in - I know that I can't call various destinations 
over BT if I
use something bogus (like na, or thiscliisaloadofoldbollocks[1]); I get 
a 403 Forbidden
back.

--Dave

[1] "bollocks" was once defined on Wikipedia as "the Swiss army knife of 
andrological
profanities" - unfortunately, like most excellent stuff on the word's 
most comprehensive
Star Trek factsheet encyclopedia anyone can ruin, that particular gem's 
been edited out.
http://en.wikipedia.org/wiki/Bollocks is still worth a read, though.


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