User-to-user sip to isdn


I want to know if it is possible to pass user-to-user info in sip.
I have a asterisk with a sip trunks and sip phones. The other equipment ( a cisco viop gateway) were the sip trunk ends connects to the world via isdn.
I want to send to the sip trunk user-to-user info that is translated do user-to.user info in isdn.
Is there so way to do this with asterisk?