Wow! That's great info. Lots of good details. Thanks Stephan.
The video is really blured. What does he type there P_Asserted_Identity.....
Bruce> Date: Tue, 22 Jul 2008 08:51:32 -0400> From: [EMAIL PROTECTED]> To:
[EMAIL PROTECTED]> CC: [email protected]> Subject: Re: [on-asterisk] Is it a
myth?> > Bruce,> > If you have your own PRI-T1, you can do this when someone
dials the *67. > You still get the callerid number, but the CallerID
Presentation Byte is > normally set to restricted or unavailable. I think
there's a rule > somewhere that forces you to respect the callerid Block and to
not > display the callerid to the end caller.> > Not sure if Asterisk gives you
access to the call IEs. but here's the > format for this IE:> > Calling Party
Number IE> 1 03h CALLING_PARTY_NUM_IE> ********************************> 2 xxh
IE count> 3 xxh Type Of number> 00h : Unknown (default)> 01h : international
number> 02h : national number> 03h : network specific number> 04h : subscriber
number> 06h : abbreviated number> 07h : reserved extension> 4 xxh Numbering
Plan> 00h : unknown (default)> 01h : ISDN/telephony numbering plan> 03h : data
numbering plan> 04h : telex numbering plan> 80h : national standard numbering
plan> 09h : private numbering plan> 0Fh : reserved for extension> 5 xxh
Presentation indicator> 00h : Presentation allowed (default)> 01h :
Presentation Restricted> 02h : Number not available due to interworking> 6 xxh
screening indicator> 00h : user-provided not screened> 01h : user-provided,
verified and passed> 02h : user-provided, verified and failed> 03h: network
provided> 7 xxh Number digit> ASCII Digit> 8 xxh Number Digit> ASCII Digit> … …
…> 31 xxh Number Digit> ASCII Digit> > You could probably modify the source
code to access this IE information > or make Asterisk to believe the callerid
is not restricted. You would > need to modify the file q931.c from the libpri
library to change how > Asterisk handles restricted callerid data.> > It could
be illegal to change the callerid presentation information in > Canada. I'm not
sure what are the laws around this stuff, but the > information in this email
is just to explain you how the callerid is > delivered on PRI-T1 signaling. I
wouldn't change it in a production > environment.> > I had to deal with this IE
information lately to fix a callerid issue > from one of the Mobile phone
company. They were using a different > presentation byte and we needed to
change the callerid presentation > function to be able to receive/present the
callerid numbers from one of > the Mobile phone company.> > Cheers.> > Stephan
Monette> Unlimitel Inc.> > Tel.: 613-688-6212. x221> TF : 1-877-464-6638, x221>
FAX : 613-482-1077 > > > > Bruce Nik wrote:> > Hello everyone,> > > > Just had
a chance to look at something that was posted on voipinfo.org today:> > > >
http://www.engadget.com/2008/07/21/how-to-reveal-blocked-caller-id-info-a-video-guide-to-risky-beh/>
> > > The publisher claims to unblock the *67 calls that are received to his
Asterisk server by manipulating the P identity. > > > > How true is this?> > >
> Does it work with certain providers?> > > > I thought the caller ID block
happens and CO and never gets passed to the phone set. > > > > Bruce> >
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