NEAX2400 ICS Business Features and Specifications
NDA-24143, Issue 4
Page 211
Direct Digital Interface D-16
D-16 Direct Digital Interface
General Description
This service feature provides the capability to connect trunks from the NEAX2400 ICS directly to “T1”
carrier links via either private or public network.
Operating Procedure
No manual operation is required.
Service Conditions
1. The DTI provides signalling interface, bipolar/unipolar conversion, frame synchronization,
insertion/extraction and alarm detection.
2. The Digital Interface Module can be provided with circuit cards to interface with “T1” carrier and/
or CCITT standard networks.
3. The Digital Interface Module (DTI) is mounted in a Port Interface Module (PIM).
4. The following two methods may be used for network synchronization.
5. Each office hierarchy is defined as follows:
a.) Master Office: One center will operate as the Master Office. This location has two highly
stabilized master oscillators, and distributes the Master Clock to all the systems through
the digital interface lines.
Private Network: Connecting Digital Networks
Private Network: Connecting Digital Networks
DS-1 Signal Level
PCM Transmission Line
(24 Channel)
Office Line Line Office
Rep Rep Rep Rep
Office Line Line Office
Rep Rep Rep Rep
Digital PBX
Digital PBX
Traditional
Analog PBX
Traditional
Analog PBX
D3
Bank
D3
Bank
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