What field is used as a SCREENING number when using SIP.

[ik]

On Thu, Aug 18, 2011 at 13:33, Boris shtrasman <borissh1983 at gmail.com>wrote:

>
>
> On Thu, Aug 18, 2011 at 13:17, ik <idokan at gmail.com> wrote:
>
>> 2011/8/18 Boris shtrasman <borissh1983 at gmail.com>
>>
>>> Hi ,
>>>
>>> with plain old SS7 we send a number and fill a field -  how we got the
>>> calling number  (Screening indicator), but what happen with SIP ?
>>>
>>> I noticed a few practices how this data is passed (using a hint ,
>>> P-Asserted-Identity and  Remote-Party-ID )  but I'm searching for a common
>>> solution rather the checking all options to what should I expect when
>>> sending a SIP message from my SER to other networks (peering).
>>>
>>> what would be a good solution for forwarding a blocked call ?
>>> how should i fill the the invite on my ser so I could block / unblock
>>> call ?
>>>
>>
>> As far as I know, there is no single way of doing it. I do not know the
>> whole RFC's of SIP, but in practice it depends on the provider gateway.
>>
>>
>
> So a good practice is to use all the known options ?
>

And hope for the best. Some does not send the phone number at all.
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