-// mISDN_clear_stack(mISDNdevice, mISDNport->d_stid);
- if (mISDNport->lower_id)
- mISDN_write_frame(mISDNdevice, buf, mISDNport->lower_id, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);
+ if (mISDNport->upper_id)
+ mISDN_write_frame(mISDNdevice, buf, mISDNport->upper_id | FLG_MSG_DOWN, MGR_DELLAYER | REQUEST, 0, 0, NULL, TIMEOUT_1SEC);