ATIS T1.403 : 99 SUPP B 2002

Foreword
1 Scope
2 Normative references
3 Definitions, Abbreviations and Acronyms
4 General information
5 Electrical specifications
6 Receiver impedance and return loss
7 Framing formats
8 DSI application
9 Maintenance
10 Connector arrangements
Table 1 - Requirements for reference signals
Table 2 - Superframe format
Table 3 - Extended superframe format
Table 4 - Assigned bit-patterned ESF data link messages
Table 5 - Unassigned ESF data link messages
Table 6 - Example of performance report messages
Figure 1 - Network interface
Figure 2 - Isolated pulse template and corner points
Figure 3 - Pulse amplitude envelope with 60 Hz longitudinal
           currents
Figure 4 - Frequency weighting functions for jitter
           specifications
Figure 5 - Bit assignments
Figure 6 - Performance report message structure and contents
Figure 7 - Customer Installation Loopbacks
Figure 8 - Longitudinal balance measuring circuitry
Figure 9 - Connector pin assignments (8-position RJ48C)
Figure 10 - Connector pin assignments (8-position RJ48X with
            shorting bars)
Figure 11 - Connector pin assignments (50-position RJ48M)
Figure 12 - Connector pin assignments (50-position RJ48H)
Annex A - Path and test signal identification message
          requirements
Annex B - In-band signaling for fractional-TI (FTI) channel
          loopbacks
Annex C - DSI idle signal
Annex D - AIS-CI and RAI-CI
Annex E - Supplementary Performance Report Message (SPRM)
Annex F - Network Performance Report Message (NPRM)
Annex G - Cable Characteristics
Annex H - Line Build-Out
Annex I - ESF Data Link Message Comparison With Other
          Standards
Annex J - Alarm Indication Signal
Annex K - Bibliography

Addresses the requirements for a DS1 carrier to customer installation DS1 metallic interface, referred to as the network interface. Requirements include electrical characteristics, format parameters and physical characteristics at the interface. The signals at the NI that are described in this standard are of two types: normal operating signals; maintenance signals. A 4-wire DS1 interface based on the various metallic digital facilities currently in use and covered in this standard.