NEC NEAX 2000 IPS Reference Manual page 69

Electrical Characteristics (Central Office Trunk)
Description
Insulation Resistance
DC Resistance
Impedance
Leak Current
Transmission Characteristics (For TDM Circuits)
Description
PCM Coding System
Insertion Loss
Return Loss
Longitudinal Balance
Attenuation/Frequency Distortion
Group Delay Distortion
Total Distortion
Idle Channel Noise
Impulsive Noise
Cross Talk Attenuation
Inter-modulation Products
Spurious In-Band Signals
Signal Attenuation
NEAX2000 IPS Request For Proposal (RFP) Reference Guide
NDA-24349 Issue 4
Specifications
15 mega-ohms or more at 100Vdc
On-hook conditions: 30 mega-ohms
Off-hook conditions: 1,700 ohms
On-hook conditions: 20 kilo-ohms (300 to 3,400Hz)
8 kilo-ohms (at 24Hz)
Looped conditions: 600 ohms
0 mA at on-hook conditions
A-law/U-law
0.15 dB at 1KHz
20 dB or more (300 to 3,400Hz) against 600 ohms
59 dB or more (300 to 3,400Hz)
-0.2 dB to +0.7 dB (300 to 3,400Hz)
0 to 0.3msec. (500 to 2,800 Hz)
25 dB (Input signal:-45 dBm0)/40 dB(input signal:0 dBm0)
-67 dBmop or less (psophometric noise)
-50 dBm0 or less (single frequency noise)
0 counts at -35 dBm
90 dB or more
-40 dB or more
-49 dBm0 or less
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
Chapter 3 System Highlights
Specifications
Page 3-17