[SR-Users] Removing unwanted characters from From-header

Hi, Hello! I'm having trouble with matching massages for some Patton equipment, from the looks of it, Patton don't like </> in headers. The initial INVITE from Patton is sent without </> in To and From-headers. In the logs from Patton I can see that it matches the "100 trying" that Kamailio sends back to it, and this message has To and From-headers without </>, but the "180 Ringing" and "200 OK" that Kamailio sends is not matched, and these two has </>. I would like to remove < and > in my onreply_route, how can I do this? Or does anyone have experience on how Patton matches messages? Br Sebastian Thörn