Passing user-user info from PRI to SIP channel



I’m trying to pass user-user information from a PRI call setup to a SIP INVITE, and vice versa (Probably I will add the info to the SDP).

I confirmed that the information is available on the libpri, and I believe it is also available on the chan_zap but have not yet confirmed this last point at runtime.

My question is how I can pass this information on a bridged call from the Zap channel to the SIP channel. What mechanisms are available on Asterisk to do this kind of things?

Thanks in advance for any help.