I tried, but no luck.
What I did was put a small PABX on the front, run the E1 into the PABX and use it to split the main E1 into two streams, one using PRI to get ANI, and a second one using CAS.
I did fed the PRI into port one(PSTN), and the second one into the PBX side.
If anyone knows how to do it in a simpler way (san PABX),please post.