NEC 2000 IPS manual Transmission Characteristics For TDM Circuits, Line Conditions, Cable Length

Chapter 3 System Highlights

Transmission Characteristics (For TDM Circuits)

Description	Specifications
PCM Coding System	A-law/U-law
Insertion Loss	0.15 dB at 1KHz
Return Loss	20 dB or more (300 to 3,400Hz) against 600 ohms
Longitudinal Balance	59 dB or more (300 to 3,400Hz)
Attenuation/Frequency Distortion	-0.2 dB to +0.7 dB (300 to 3,400Hz)
Group Delay Distortion	0 to 0.3msec. (500 to 2,800 Hz)
Total Distortion	25 dB (Input signal:-45 dBm0)/40 dB(input signal:0 dBm0)
Idle Channel Noise	-67 dBmop or less (psophometric noise)
	-50 dBm0 or less (single frequency noise)
Impulsive Noise	0 counts at -35 dBm
Cross Talk Attenuation	90 dB or more
Inter-modulation Products	-40 dB or more
Spurious In-Band Signals	-49 dBm0 or less
Signal Attenuation	Attenuation rate: 12 dB per octave or more at 3.4 kHz above
	Attenuation level: -40 dBm or less at 3.4 kHz and above
	-70 dBm or less at 50 kHz and above

Line Conditions

	Description		Specifications
Loop Resistance (including Telephone Set)
Analog Standard Line			Max. 600 ohms
Analog Long Line			Max. 2,500 ohms (DP 10pps), Max. 1,700 ohms (DP 20pps)
			Max. 1,200 ohms (DTMF)
Loop Resistance (including Opposite End Resistance)
Central Office Trunk			Max. 1,700 ohms
Tie Line Trunk (Loop Dial)			Max. 2,500 ohms
Tie Line Trunk (E&M)			Max. 900 ohms (only E-wire condition)
Cable Length		Note 1
SN716 Desk Console
	8DLC/4DLC/2DLC Card		Max. 350 meters (Max. 300 meters for 8DLC card)
	4DLC/2DLC Card with		Max. 1,200 meters
	AC Adapter
Dterm Series	i/E
	8DLC/4DLC Card		Max. 200 meters (Max. 300 meters for Dterm 8 and Dterm 8D)
	2DLC Card		Max. 850 meters
	4DLC/2DLC Card with		Max. 1,200 meters
	AC Adapter
DSS/BLF Console
	4DLC/2DLC Card with		Max. 1,200 meters
	AC Adapter
Zone Transceiver
	ZTII-U (for U-Interface)		Max. 1,210 meters (2-wire), Max. 2,100 meters (4-wire) @-48V
			Max. 970 meters (2-wire), Max. 1,700 meters (4-wire) @-45V
	ZTII-U with AC Adapter		Max. 3,950 meters

Note 1: Cable length is based on cable with 0.5mm diameter and without lightning arresters

UNIVERGE NEAX 2000 IPS Request For Proposal (RFP) Reference Guide	Page 3-17
Issue 6