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Poll closed Question: PAI (P-Asserted-Id) should be introduced in phoner
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« Created by: ArminM on: 21. Sep 2022 at 09:56 »
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Normal Topic Introduce P-Asserted-ID (Read 5837 times)
ArminM
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Introduce P-Asserted-ID
21. Sep 2022 at 09:53
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Since we do a lot of testing (telecommunication company) it would be nice to have to possibility to send the P-Asserted-ID (so choose between PAI and PPI or send both)

Why: The PAI in old ISDN terms is the network provided ID as the PPI would be the user provided one.

Many SIP CPEs and PBXs are using PAI as a default value, as also some IMS entities NEED a PAI otherwise they will treat the call as untrusted.

Thank you and best regards,

Armin
  
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ArminM
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Re: Introduce P-Asserted-ID
Reply #1 - 21. Sep 2022 at 09:56
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test
  
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Re: Introduce P-Asserted-ID
Reply #2 - 21. Sep 2022 at 10:02
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PhonerLite only uses user provided data - there is no trusted ISDN or anything else. Therefore PhonerLite doesn't use PAI.
  
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ArminM
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Re: Introduce P-Asserted-ID
Reply #3 - 21. Sep 2022 at 10:07
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That's a pitty since I do not know ANY PBX, SIP CPE which cannot support the PAI (and I work for a big Telecommunication company)...sorry to mention that.

phoner is great but in that way to unfexible to use it in our company then. We do not want to copy the PPI into the PAI on for instance an SBC.......

It would really make your product MORE flexible.

Since network providers ALWAYS rely to communicate the PAI between their networks as well since the PAI reflects the trusted ID which then also is used for billing betwenn them!

best regards,

Armin
  
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Re: Introduce P-Asserted-ID
Reply #4 - 21. Sep 2022 at 10:09
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All other IP phones (not proxies) you are using send PAI?
  
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ArminM
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Re: Introduce P-Asserted-ID
Reply #5 - 21. Sep 2022 at 10:36
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90% of them and for the other 10% it is configurable, on our ASBC we then map the PPI into the PAI to transport it as trusted number (which of course id screened in the network since it is provisioned).

But for ISBC (point to point to customers PBXs) a PPI (which only is sent no PAI at all) it is considered untrusted and yes we have around 40.000 customers (40 flavors of SIP CPEs like Cisco, ZTE, Huawei, Comtrend, Patton etc, 2000 flavors of SIP PBXs, 200 flavors of micro SBC solutions Cisco, OneAccess etc etc etc).

RFC is quite clear about the P-Asserted-Id Wink

As long as the network is doing authentication (IMS always does) the PAI is the Id to go for (just as info).

There is a reason why Telco Companies use the PAI (NEVER! the PPI) between them!

Thank you and best regards,

Armin
  
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Re: Introduce P-Asserted-ID
Reply #6 - 21. Sep 2022 at 10:55
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I have a different mind for that. A phone device (hard or softphone) can not assert, that a number is valid. Therefore PhonerLite uses PPI in sent INVITE. It is up to the proxy to ensure that the number is valid and converts that to PAI.
At the moment I don't want to change that in PhonerLite.
  
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ArminM
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Re: Introduce P-Asserted-ID
Reply #7 - 22. Sep 2022 at 16:16
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No need to change it Wink just so make it selectable to send as well would be enough Smiley

That's what CPE vendors do.......
  
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ArminM
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Re: Introduce P-Asserted-ID
Reply #8 - 22. Sep 2022 at 16:19
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But thank you for your support and fast reply
  
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