[Asterisk-Dev] Block caller ID patch submitted

[Linus Surguy]

Dear All,

I was going to look at this issue as well.

In the UK CLI data is not allowed to be passed to the destination user if
either a) the caller has withheld presentation of the number or b) the
caller does not have the facility to control presentation of the number.

A switch can pass a withheld number to another if a) it is capable of
preserving the restricted flag, b) it does so and c) is passing to another
'trusted' network operator.

As such, I would recommend that the default setting should be that if on a
PRI call to Asterisk the calling number presentation is restricted then it
must not be passed out. Any configuration option that changes this should
then be on a per trunk basis.

Whether you should then return 'blank' or the text 'Withheld' or similar is
a matter for discussion.

Linus
Magrathea

----- Original Message -----
From: "John Todd" <jtodd at loligo.com>
To: <asterisk-dev at lists.digium.com>
Sent: Monday, August 04, 2003 7:05 PM
Subject: [Asterisk-Dev] Block caller ID patch submitted


>
> I've submitted a patch to the bugs.digium.com system (#48) that I believe
will make Asterisk "legal" to use in situations where blocked caller ID data
is sent to Asterisk with a "block" flag set.  This apparently is the mode of
choice for some CLECs, but sending the caller ID data along to the end
station is illegal (at least, here in the US it is.)  All you CLECs should
be very interested in this patch.  :)  While sending caller ID data even if
blocked seems noble (thwart those telemarkters!) it is still undesired,
since there are situations where this could be very bad for the caller
(think of spousal abuse cases, or workplace whistleblowers.)
>
> As I mention in the bug/feature request, someone with more zapata.conf
clue should make this a per-PRI configurable switch instead of always-on or
always-off.
>
> JT
>
>
>
> --- q931.c~     Sat Jul 26 15:14:44 2003
> +++ q931.c      Mon Aug  4 17:49:08 2003
> @@ -741,6 +741,7 @@
>
>         q931_get_number(cnum, sizeof(cnum), ie->data + 2, len - 4);
>         pri_message("%c Calling Number (len=%2d) [ Ext: %d  TON: %s (%d)
NPI: %s (%d)\n", prefix, len, ie->data[0] >> 7, ton2str((ie->data[0] >> 4) &
0x07), (ie->data[0] >> 4) & 0x07, npi2str(ie->data[0] & 0x0f), ie->data[0] &
0x0f);
> +       if ((ie->data[1] & 0x7f) == 35) cnum[0] = '\0';
>         pri_message("%c                           Presentation: %s (%d)
'%s' ]\n", prefix, pri_pres2str(ie->data[1]), ie->data[1] & 0x7f, cnum);
>  }
>
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