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Chapter 1 CCIS FEATURES
1-10
NWA-088654-001 Rev.1.0
94ch1001.fm
CCT SPECIFICATIONS
CCT 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
75
(Coaxial Cable)
120
(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 Synchronization
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
(22 ABAM) twisted-
pair cable]
Maximum 400 m
(Maximum 1312.4 ft.)
[with 0.65
(22 ABAM) twisted-
pair cable]