Thanks Klaus. I made: avp_write("$fU","$avp(s:uri_ini)"); avp_write("$fU","$avp(s:code_uri)"); #add the code from area to uri avp_subst("$avp(s:code_uri)", "/[0-9]{7}$/$tU/"); avp_pushto("$ru/username","$avp(s:code_uri)"); avp_delete("$avp(s:uri_ini)"); avp_delete("$avp(s:code_uri)"); Klaus Darilion <klaus.mailinglists(a)pernau.at> escribió: 1. copy the from userpart into an AVP (use the pseudo variable for from userpart - I think it is $fU). E.g with avp_printf or avp_write 2. use a regular expression to copy the first 3 digits (withouth sip:) into a new AVP2. 3. create a new AVP3 which consists of the 3 digits and the request URI (e.g. avp_printf with AVP2 and $ru) 4. avp_push AVP3 back to the request URI regards klaus Jose Gil Navarrete wrote: -- Klaus Darilion nic.at --------------------------------- Do You Yahoo!? La mejor conexión a Internet y 2GB extra a tu correo por $100 al mes. http://net.yahoo.com.mx