[Freeswitch-users] preserve A-leg From header value and P-Asserted-Identity in B-leg

[Vik Killa]

Hello,
According to Q.1912 spec, the 'Generic Number' or sometimes called
'Additional calling number' may be placed in the "From" SIP header, while
the Calling Party Number can be placed in the P-Asserted-Identity.

We've noticed that in the case when FreeSWITCH receives an INVITE like this
(From header & PAI header have different information), FreeSWITCH will
disregard the From and use only the PAI number in both B-leg From header
and PAI.

I've found a work around to solve this by exporting the A-leg variable
${sip_from_user} into the B-leg's ${sip_from_user}
Example:

<action application="bridge" data="{sip_from_uri=${
sip_from_user}@172.20.207.155}sofia/internal/sip:555 at 172.20.207.154:5060"/>

This seems like a hack at best... my question is, there a more elegant way
to preserve the respective From & PAI of A-leg and just place them in B-leg?

Thanks in advance.
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