NEC 2000 IPS manual DTI Specifications, Characteristics Channel

			Chapter 14 Common Channel Inter-Office Signaling (CCIS)
DTI Specifications
	Characteristics		24-Channel	30-Channel
	Output		1.544 Mbps – 50 ppm	2.048 Mbps – 50 ppm
	Line Rate
	Line Code		AMI with ZCS/B8ZS*	HDB3 (High Density Bipolar 3)
	Line Impedance		100 ohms	75 ohms + 100 mH
				(Coaxial Cable)
				120 ohms + 160 mH
	Pulse Amplitude		3 volts – 0.6 volts	2.37 volts nominal
	(Base to Peak)			(Coaxial Cable)
				3 volts nominal
	Pulse Width		324 ns – 30 ns	(Twisted-Pair Cable)
				244 ns nominal
	Input			2.048 Mbps – 50 ppm
	Line Rate		1.544 Mbps – 2000 bps (130 ppm)	1.5 volts – 2.7
	Pulse Amplitude		1.5 volts – 3 volts	(Coaxial Cable)
	(Base to Peak)			1.5 volts – 3.3 volts
				(Twisted-Pair Cable)
	Frame Synchronization	100011011100
	Pattern
	Input Jitter		ITU-T Fig. 1/G743	ITU-T Fig. 1/G743
	Wander		+138UI, -193UI or	ITU G823
			-138UI, +193UI
	Cable Length from		Max. 200 m (656.2 ft.)	Maximum 400 m (1312.4 ft.)
	PBX to MDF or		[With 0.65 gauge (22 ABAM)	[With 0.65 gauge (22 ABAM)
	External Equipment		twisted pair cable]	twisted pair cable]

*AMI: Alternate Mark Inversion

ZCS: Zero Code Suppression

B8ZS: Bipolar Eight Zero Substitution.

UNIVERGE NEAX 2000 IPS Request For Proposal (RFP) Reference Guide	Page 14-21
Issue 6