digraph G {
rankdir=TB
labelloc=t; label="Handover FSM: Inter-BSC Incoming"

	old_bss [label="old BSS",shape=box3d]
	msc [label="MSC",shape=box3d]
	ho_in [label="inter-BSC HO Incoming",shape=box]
	gscon [label="gscon FSM",shape=box3d]
	lchan [label="lchan FSM",shape=box3d]
	msc2 [label="msc",shape=box3d]
	old_bsc2 [label="old BSC",shape=box3d]
	old_lchan [label="old lchan",shape=box3d]
	terminate [shape=octagon]

	old_bss -> msc [label="BSSMAP Handover Required",style=dotted]
	msc -> ho_in [label="BSSMAP Handover Request",style=dotted]
	ho_in -> gscon [label="GSCON_EV_A_CONN_IND\nBSSMAP Handover Request",style=dotted]
	gscon -> HO_ST_WAIT_LCHAN_ACTIVE [label="handover_start_inter_bsc_in()",style=dotted]
	HO_ST_WAIT_LCHAN_ACTIVE -> lchan [label="lchan_activate()\nFOR_HANDOVER",style=dotted]
	lchan -> HO_ST_WAIT_LCHAN_ACTIVE [label="HO_EV_\nLCHAN_ACTIVE,\n_ERROR",style=dotted,constraint=false]
	HO_ST_WAIT_LCHAN_ACTIVE -> HO_ST_WAIT_RR_HO_DETECT [label="SCCPlite\nor no voice"]

	HO_ST_WAIT_LCHAN_ACTIVE -> WAIT_MGW_ENDPOINT_TO_MSC [label="AoIP\nhas voice"]
	WAIT_MGW_ENDPOINT_TO_MSC -> HO_ST_WAIT_RR_HO_DETECT
	
	HO_ST_WAIT_RR_HO_DETECT -> msc2 [label="BSSMAP\nHandover\nAccept\nwith\nRR Handover\nCommand",style=dotted]
	msc2 -> old_bsc2 -> old_lchan [label="RR Handover\nCommand",style=dotted]
	old_lchan -> lchan [label="MS moves",style=dotted,constraint=false]

	lchan -> HO_ST_WAIT_RR_HO_DETECT [label="RR Handover\nDetect",style=dotted]
	HO_ST_WAIT_RR_HO_DETECT -> WAIT_RR_HO_COMPLETE

	lchan -> WAIT_RR_HO_COMPLETE [label="RR Handover\nComplete",style=dotted]
	WAIT_RR_HO_COMPLETE -> WAIT_LCHAN_ESTABLISHED
	lchan -> WAIT_LCHAN_ESTABLISHED [label="HO_EV_LCHAN_\nESTABLISHED",style=dotted]

	WAIT_LCHAN_ESTABLISHED -> terminate
	terminate -> msc2 [label="BSSMAP Handover\nComplete\n/ Failure",style=dotted,constraint=false]

	err [label="on error",shape=box,style=dashed]
	err -> terminate [style=dashed]

}
