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CHAPTER 1
General
7.5 Range of Faults Specification
(1) Upon receiving a fault report from a station user or an operator, the technician can assume a faulty card
exists if the range affected by the fault can be determined. For the detailed procedure, refer to Chapter 6.
Use the following actions to check the MDF:
(a) Check the LENS of the reporter (Station or ATTCON/DESKCON).
(b) Check other circuits of the circuit card in which the reporter (station line or ATTCON/DESKCON) is
located.
(c) Check the other groups (other circuit cards mounted in the same module) in the module in which the
reporter is located.
(d) Check lines in each of the other modules on the basis of multiple lines.
(2) If the fault cannot be detected by the system (a fault related to the speech path such as noise during speech,
one-way speech, speech inability), the range of (a) through (d) (itemized above) should be limited.
(3) When a major fault is detected in the dual systems, the CPU or TSW system automatically changes over if
the fault range is (c) and (d). In this case, the whole module involved is placed into make-busy status even
if the fault is partial, and the station lines currently operating normally become faulty status. Diagnose the
fault from the content of the system message displayed and repair the fault as required.
(4) To narrow down the range of faults, consider the system circuitry that consists of the control (see Figures
1-17 and Figure 1-18, where CPU 0 is active) and speech path systems (see Figure 1-14 and Figure 1-19).
(5) As seen from the block diagrams in Figure 1-14 through Figure 1-19, if a fault that affects the common
portions occurs, all other associated portions will be affected by this fault. When CPU and TSW are pro-
vided in dual configuration, they will be automatically changed over as far as the fault is detectable by the
system.
Содержание SV8500
Страница 303: ...256 CHAPTER 3 System Messages Related call release result b7 b0 b7 0 1 Released Not released 4...
Страница 376: ...329 CHAPTER 3 System Messages Level Level b7 b6 b5 b4 b3 b2 b1 b0 G0 G1 G2 G3 G30 G31 0 1 Ineffectively held...
Страница 378: ...331 CHAPTER 3 System Messages Level Level b7 b6 b5 b4 b3 b2 b1 b0 G0 G1 G2 G3 G30 G31 0 1 Ineffectively held...
Страница 547: ...500 CHAPTER 3 System Messages IP Address of when failed to LOGIN b7 b6 b5 b4 b3 b2 b1 b0 16 19...
Страница 597: ...550 CHAPTER 4 Fault Repair Procedures This page is for your notes...
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Страница 748: ...701 CHAPTER 7 Maintenance Commands SYSTEM SELECT 3 SW 1 8 Not used STS OFF Fixed...
Страница 781: ...734 CHAPTER 7 Maintenance Commands Exit Exit the command Clear Clear the values Recalc Re calculate bandwidth data...
Страница 798: ...751 CHAPTER 7 Maintenance Commands Set Execute the assigned MW lamp control Exit Exit this command...
Страница 843: ...796 CHAPTER 7 Maintenance Commands Get Get the Individual Call Block Data Exit Exit this command...
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