CHAPTER 1 GENERAL INFORMATION
– 29 – NWA-008853-001 Rev.3.0
97ch1001.fm
DTI SPECIFICATIONS
Transmission Characteristics
Transmission Characteristics
* AMI: Alternate Mark Inversion
ZCS: Zero Code Suppression
B8ZS: Bipolar Eight Zero Substitution
CHARACTERISTICS 24-CHANNEL 30-CHANNEL
(1) Output
• Line Rate 1.544 Mbps ±50 ppm 2.048 Mbps ±50 ppm
• Line Code AMI with ZCS/B8ZS* High Density Bipolar 3 (HDB3)
• Line Impedance 100 Ω 75 Ω
(Coaxial Cable)
120 Ω
(Twisted-Pair Cable)
• Pulse Amplitude
(Base to Peak)
3 volts ±0.6 volts 2.37 volts nominal
(Coaxial Cable)
3 volts nominal
(Twisted-Pair Cable)
• Pulse Width 324 ns ±30 ns 244 ns nominal
(2) Input
• Line Rate 1.544 Mbps ±200 bps (130 ppm) 2.048 Mbps ±50 ppm
• Pulse Amplitude
(Base to Peak)
1.5 volts – 3 volts 1.5 volts – 2.7 volts
(Coaxial Cable)
1.5 volts – 3.3 volts
(Twisted-Pair Cable)
• Frame Synchroniza-
tion Pattern
100011011100
• Input Jitter ITU-T Fig. 1/G743 ITU-T Fig. 1/G743
• Wander +138UI, –193UI or
–138UI, +193UI
ITU-T G823
• Cable Length from
PBX to MDF or Exter-
nal Equipment
Maximum 200 m
(Maximum 656.2 ft.)
[with 0.65
φ
(22 ABAM) twisted-
pair cable]
Maximum 400 m
(Maximum 1312.4 ft.)
[with 0.65
φ
(22 ABAM) twisted-
pair cable]
DTI SPECIFICATIONS
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