Panasonic 1200N manual ATM Cell Format

Line Interface Hardware Interface

ce ll 5 3 B yte

		U N I
	M SB		LSB
Byte		G FC (4)	VPI(4)
		VPI(4)	VC I(4)
er 5
		VC I(8)
ad		VC I(4)	PT(3)	(1)
he
		H EC (8)
4 8 B yte
		U ser Inform ation
p aylo ad

		N N I
	M SB		LSB
		VPI(8)
		VPI(4)	VC I(4)
C LP		VC I(8)			C LP	U N I: U ser-N etw ork Interface
		VC I(4)	PT(3)	(1)
						N N I: N etw ork-N etw ork Interface
		H EC (8)
						G FC : G eneric Flow C ontrol
		U ser Inform ation				VPI:	Virtual Path Identifier
						VC I:	Virtual C hannel Identifier
						PT:	Payload Type
						C LP: C ell Loss Priority
						H EC : H eader Error C ontrol

G FC	VPI	VC I	PT	C LP	use
0	0	0	x	0	unassigned cell
0	x	1	0,2	*	m eta signalling (default VPI=0)
0	x	2	0-3	*	general broadcast signalling (default VPI=0)
0	x	3	0,2	*	segm ent O AM F4
0	x	4	0,2	*	end-to-end O AM F4
0	x	5	0-3	*	point-to-point signalling (default VPI=0)
0	x	16		*	ILM I (Interim Local M anagem ent Interface)
			0	*	user data cell, no congestion, SD U -type=0
			1	*	user data cell, congestion, SD U -type=1
		any	2	*	user data cell, congestion, SD U -type=0
0	x	value	3	*	user data cell, no congestion, SD U -type=1
		other
			4	*	segm ent O AM F5
		than
			5	*	end-to-end O AM F5
		0
			6	*	reserved for traffic cont. and resource m an.
			7	*	reserved

0norm al priority 1 low er priority

Figure 6-11: ATM Cell Format

6-10	Centillion 1200N ATM Switch User Manual
	NTP 297-8103-903