[Asterisk-Users] Address Separator hex b causes callerid rejection

[Linus Surguy]

I missed your earlier message, but to try and help:

a) You are correct, the hex 'b' usage is only valid in the UK specific BT
IUP SS#7 interconnect protocol and therefore is nothing to do with PRI usage
whatsoever (or indeed ISUP SS#7).

b) In q931.c these various flags can be set for outbound CLI (caller id),
from user provided not verified, user provider verified, user provided
verfication failed, and network provided.

c) BT however will only accept CLI that you are authorised to send -
whatever the state of the flags, this means that you can only send CLI that
matches numbers that have been allocated to your PRI. If you are trying to
do otherwise this will always fail.

Linus

----- Original Message -----
From: "bam" <bam at cqm.co.uk>
To: <asterisk-users at lists.digium.com>
Sent: Monday, February 02, 2004 12:02 PM
Subject: Re: [Asterisk-Users] Address Separator hex b causes callerid
rejection


> I've now twigged that this is an SS7 flag and is being set in our switch
as
> a result of * passing the Network provided screening indicator to a value
> that is interpreted as untrusted. Is there a simple way of changing the
> default value for this?
>
> At 16:22 30/01/04, you wrote:
>
> >I am having a little bit of a problem with BT rejecting my callerid
values
> >as they are prefixed by hex b. This indicates that the caller id is user
> >provided and not verified.
> >
> >Does anyone know how I can control where this appears in the cli?
> >
> >
> >The purpose of the separator is described below:
> >
> >1 - PNO 006 section 2.4.19 c note states that the hex b denotes an
> >address separator, to separate the part which is network provided from
> >that which is user provided - This means that it separates the extension
> >number from the rest of the number.
> >
> >2 - PNO008 section 22.1.3.3 states that the hex b dependant on its
> >position, denotes whether the screening indicator is user provided not
> >verified, network provided or user provided verified and passed.
>
>
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