add_trace("from", NULL, "CH(%lu)", port_id);
if (param->setup.callerinfo.extension[0])
add_trace("extension", NULL, "%s", param->setup.callerinfo.extension);
add_trace("from", NULL, "CH(%lu)", port_id);
if (param->setup.callerinfo.extension[0])
add_trace("extension", NULL, "%s", param->setup.callerinfo.extension);