NEC Univerge SV8500 Operation And Maintenance Manual page 138

<1-IMG>
CPU Card Changeover:
Speech Path Changeover: The ACT/STBY of speech path system (TSW) can be changed over by the
PLO Changeover:
Figure 2-6 Switching Network General Block Diagram (1-IMG)
[PIR]
[SV8500 Server]
When CPU changes over, EXB will also change over.
Note 1:
When TSW changes over, all the speech path including MUX cards also change over.
Note 2:
TSW has a MBR key (Make Busy Request). System changeover is available also by this key.
Note 3:
System changeover is available by the MBR key on the front of the CPU card in ACT state.
Note 4:
The ACT/STBY of CPU card can be changed by the CMOD command or
operating the MBR key on the CPU card front panel.
CMOD command or operating the TSW MBR key on the active TSW cir-
cuit card. When the TSW is changed over, all MUX cards in the system are
also changed over.
PLO is included in the TSW. To change the ACT/STBY of PLO, operate
PLO MBR key on the PLO active TSW card.
IMG 0
Line/Trunk PM
MUX MUX MUX
TSW 0
(PLO 0)
TSW: PH-SW10-A
EXB0
CPU0
EMA
– 91 –
CHAPTER 2
Note 2:
MUX
TSW 1
Note 3:
(PLO 1)
MUX: PH-PC36
Note 1:
EXB1
Note 4:
CPU1
Operations of SV8500 Server