adapted functions f_cf_int_as_up, f_cf_int_as_down

new functions f_cf_roam_as_up, f_cf_roam_as_down
	due to document ts_18601102v020301p chapter 4.3.4
	Figure 4 and 5 (iscA or iscB are optional and can 
					be used both or either iscA or iscB)