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DIRECT DIGITAL INTERFACE (DDI)
DTI SPECIFICATIONS
– 200 –
A2195-10
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
•
Line Code
•
Line Impedance
•
Pulse Amplitude
(Base to Peak)
•
Pulse Width
(2) Input
•
Line Rate
•
Pulse Amplitude
(Base to Peak)
•
Frame Synchroniza-
tion Pattern
•
Input Jitter
•
Wander
•
Cable Length from
PBX to CSU
1.544 Mbps ±50 ppm
AMI with ZCS/B8ZS*
100 ohms
3 volts ±0.6 volts
324 ns ±30 ns
1.544 Mbps ±200 bps (130 ppm)
1.5 volts-3 volts
100011011100
ITU-T Fig. 1/G743
+138U1, –193UI or
–138UI, +193UI
Max. 200 m (655 ft.)
[with 0.6
φ
(22 ABAM) twisted-
pair cable]
2.048 Mbps ±50 ppm
HDB3 (High Density Bipolar 3)
75 ohms +100 µH
(Coaxial Cable)
120 ohms-160 µH
(Twisted-Pair Cable)
2.37 volts nominal
(Coaxial Cable)
3 volts nominal
(Twisted-Pair Cable)
244 ns nominal
2.048 Mbps ±50 ppm
1.5 volts-2.7 volts
(Coaxial Cable)
1.5 volts-3.3 volts
(Twisted-Pair Cable)
ITU-T Fig. 1/G743
ITU-T G823
Max. 400 m
(with 0.6
φ
twisted-pair cable)
Содержание NEAX 2000
Страница 1: ...ND 70916 E ISSUE 1 Feature Programming Manual JANUARY 2000 NEC Corporation ...
Страница 95: ...BROKER S CALL 75 A2066 10 BROKER S CALL PROGRAMMING Refer to CALL HOLD and CALL HOLD Dterm page 95 ...
Страница 102: ...CALL BACK MULTIPLE ASSIGNMENT 82 A2076 10 CALL BACK MULTIPLE ASSIGNMENT PROGRAMMING Refer to CALL BACK page 80 ...
Страница 157: ...CALL QUEUING 137 A2131 10 CALL QUEUING PROGRAMMING Refer to CALL WAITING DISPLAY page 142 ...
Страница 272: ...EXECUTIVE RIGHT OF WAY EXECUTIVE RIGHT OF WAY Dterm 252 A2247 10 HARDWARE REQUIRED Dterm and DLC card if required ...
Страница 273: ...FAULT MESSAGE 253 A2247 10 FAULT MESSAGE PROGRAMMING Refer to Maintenance Manual ...
Страница 402: ...PEG COUNT 382 A2382 10 PEG COUNT PROGRAMMING Refer to the CMB0 B3 of the Command Manual ...
Страница 443: ...SELF DIAGNOSIS 423 A2412 10 SELF DIAGNOSIS PROGRAMMING Refer to the Maintenance Manual ...
Страница 496: ...STATION LINE STATUS DISPLAY 476 A2463 10 STATION LINE STATUS DISPLAY PROGRAMMING Refer to Maintenance Manual ...
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Страница 754: ... C26 A2C14 10 THIS PAGE LEFT BLANK INTENTIONALLY ...
Страница 757: ...ND 91285 001 E ISSUE 1 Model 100MX BUSINESS FEATURES AND SPECIFICATIONS DECEMBER 1999 NEC Corporation ...
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Страница 1199: ...ND 91285 002 E ISSUE 1 Model 100MX HOSPITALITY FEATURES AND SPECIFICATIONS OCTOBER 1999 ...