– 619 –
CHAPTER 5
Operation Procedure for System with PIR
4.4.2
Check Point (2/2)
When repairing a unit fault, consider the following items:
(1) Speech paths and control paths in the unit are connected to line/trunks via the MUX circuit cards. Be sure
to check the alarm lamps on the MUX circuit cards, and check to see if the front cable between each MUX
circuit card and TSW circuit card is connected correctly. Figure 5-11 and Figure 5-12 show the block dia-
gram within the unit.
(2) The MUX circuit cards are operating in the ACT/STBY modes under control of the CPU circuit. When the
ACT-side CPU has detected a fault in the ACT-side MUX circuit card, CPU changeover is executed and
the ACT/STBY mode of the Speech Path System is also changed over. When both of the MUX circuit cards
have become faulty, all the lines/trunks in that unit are placed into make-busy state. (If a PFT circuit card
is located in that specific unit, the PFT is activated.) Figure 5-13 shows the location of the MUX cards.
(3) When both units in a specific PIR are faulty, it is possible that the PWR circuit card mounted in that specific
PIR is faulty. In such a case, refer to
Section 4.9, Power Supply Fault
Figure 5-11 Unit Control Block Diagram (Dual Configuration)
MUX 0
Clock
(B)
(A)
Speech
Path
TSW
MUX 1
LC/TRK
LC/TRK
PM
Line/
Trunk
Circuit Card
Control of
TP
Clock
(B)
Speech
Path
(A)
TSW
SYMBOLS
: Circuit Card
: Control on ACT/STBY of Speech Path Systems
: Control on ACT/STBY of Clock Systems
(A)
(B)
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...
Страница 728: ...681 CHAPTER 6 Routine Maintenance Procedure Condition And Cause Procedure and Parts Used...
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...
Страница 973: ......
Страница 974: ...Printed in Japan 0901 020...
Страница 975: ......