User's Manual

NDA-24300 CHAPTER 5
Page 323
Issue 1
FAULT REPAIR PROCEDURES
2.2 Trunk Control
Trunk circuit cards are controlled from the CPU via the MUX. Each trunk line in a specific trunk circuit
card is controlled by the Port Microprocessor (PM) in a trunk circuit card. Figure 5-2 shows the control
route of the trunk circuit card.
Figure 5-2 Controlling Trunk Circuit Cards and Speech Path
TRK
TDSW/INT
GT
CPU
CPR
TSW
MDF
LT Cable
LT Cable
Control Signal
Speech Path
Control Signal
COT/TLT
Symbols:
: Circuit Card : Speech Path
: Control Signal
TSW: PH-SW12 GT: PH-GT09
MUX: PH-PC36 ISAGT: PZ-GT13
TRK
PM
MUX
TRK
Control Signal
Speech Path
ORT/SND
TRK
PM
CFT
Note
TRK
Control Signal
Speech Path
ORT/SND
TRK
PM
MUX
Control Signal
Speech Path
CFT
Note
Note:
Eight CFTs are provided on the MUX (PH-PC36) cards.
Network
ISAGT
TRK
LT Cable
LT Cable
COT/TLT
TRK
PM