Hello Sayan, > You may want to look at the ITU recommendations as well , specifically > Q.1912.5 sections 7.1.3 and 6.1.3.6. It has detailed tables on this.
Yes. I know the tables. > The SIP UA knows anyways that the From is not a "trusted" header , so > based on local policy it may give preference to the PAI. But a problem is that no UA exists (afaik) which understands the PAI header field. All UAs only present the From header on being called. > On the PSTN side, again it's a policy decision provisioned on the > switch based on the APRI values on which number should be presented ... Also on PSTN there are no ISDN terminals (afaik) which offer both identities or some configurable policy parameter. Looking at the user equipment I have the impression that the concept of both identities is not well understood and therefore also not well implemented. Best regards Franz _______________________________________________ Sip-implementors mailing list Sip-implementors@cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
