Nortel Networks DCT1900 - Manual (Page 351)

Technical Product Manual - DCT1900
Maintenance, Test and Maintenance Software
Maint-DCT1900/R8/mw 2-1
© 2000-2005
C HAPTER 2
Test and Maintenance Software
2.1 Introduction
The DCT1900 system has a powerful Test & Maintenance module incorporated in the system
software. This software module regularly tests the entire system to locate possible faults in an
early stage and to isolate the faulty circuits, thus minimizing the reduction in system service and to
generate subsequent error messages and alarms. This chapter describes the functions of the test
and maintenance software which are:
z Error handling (Paragraph 2.2)
z Testing (Paragraph 2.3)
z Resetting (Paragraph 2.4)
Paragraph 2.2 gives an explanation of how T&M diagnosis verifies and eliminates faults and
makes up a fault report.
For a good understanding of this chapter, the following shall be noted (see Figure 2–1):
z Board Controllers
BC are micro controllers, which control all communication between the various circuit boards
and CPU. The SPU-S, CLU and the LTU have one board controller, the DTU and the SLU
have two board controllers.
z Peripherals (P1..P8).
Each board, except for the CPU and the DTU, has a number of peripherals, i.e. a number of
identical circuits which act as a single device. The SPU has eight peripherals (SPCs) to handle
eight calls. The LTU has 8 peripherals to which PBX line ports are connected to. A CLU/CLU-
S has eight peripherals to which base stations can be connected. The SLU is a SPU and a
CLU combined on one board, each with its own board controller, peripherals and board
address. The DTU board has no peripherals but contains two identical circuits each controlled
by a board controller and has subsequently two board addresses. The CLU, CLU-S, SPU,
SLU and LTU peripherals are controlled by a board controller.
z Peripheral or board controller state.
The state of a board controller or peripheral is identified as "new", "available", "malfunction-
ing", etc. The actual state of such a circuit can be obtained by means of the CSMW software.
For more information refer to the CSMW "Installer’s User Guide" Appendix I.