DIRECT DIGITAL INTERFACE (DDI)
DTI
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A2195-10
DTI
The Digital Trunk Interface (DTI) interfaces the PBX directly to a 24/30-channel PCM transmis-
sion line. The DTI has the following functions.
For 24-DTI:
•
Unipolar/Bipolar Conversion (AMI Format)
•
Signalling Insertion/Extraction
•
Alarm Detection/Insertion
•
Digital PAD on Voice Signal Transmission
•
Loop-Back Test (Local/Remote Loop Back)
•
Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For 30-DTI:
•
Unipolar/Bipolar Conversion (HDB3 Format)
•
Signalling Insertion/Extraction
•
Alarm Detection/Insertion
•
Digital PAD on Voice Signal Transmission
•
Cyclic Redundancy Checking (based on ITU-T Rec. G704)
•
Channel Associated Signalling (based on ITU-T Rec. 0421 Digital R2 Signalling Code)
For connection of a 24-DTI and transmission line, twisted-pair cables can be used. For connec-
tion of a 30-DTI and transmission line, either coaxial cable or twisted pair cable can be used.
Summary of Contents for NEAX 2000
Page 1: ...ND 70916 E ISSUE 1 Feature Programming Manual JANUARY 2000 NEC Corporation ...
Page 157: ...CALL QUEUING 137 A2131 10 CALL QUEUING PROGRAMMING Refer to CALL WAITING DISPLAY page 142 ...
Page 273: ...FAULT MESSAGE 253 A2247 10 FAULT MESSAGE PROGRAMMING Refer to Maintenance Manual ...
Page 402: ...PEG COUNT 382 A2382 10 PEG COUNT PROGRAMMING Refer to the CMB0 B3 of the Command Manual ...
Page 443: ...SELF DIAGNOSIS 423 A2412 10 SELF DIAGNOSIS PROGRAMMING Refer to the Maintenance Manual ...
Page 726: ... A16 A2A10 10 THIS PAGE LEFT BLANK INTENTIONALLY ...
Page 754: ... C26 A2C14 10 THIS PAGE LEFT BLANK INTENTIONALLY ...
Page 772: ...Page viii ND 91285 001 E Revision 1 0 DECEMBER 1999 THIS PAGE LEFT BLANK INTENTIONALLY ...
Page 1192: ...ND 91285 001 E DECEMBER 1999 Page 410 Revision 1 0 THIS PAGE LEFT BLANK INTENTIONALLY ...
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Page 1199: ...ND 91285 002 E ISSUE 1 Model 100MX HOSPITALITY FEATURES AND SPECIFICATIONS OCTOBER 1999 ...