NEC NDA-24300 manual Trunk Control, Controlling Trunk Circuit Cards and Speech Path

Models: NDA-24300

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FAULT REPAIR PROCEDURES

2.2Trunk 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 5-2shows the control route of the trunk circuit card.

 

 

ORT/SND

 

 

Control Signal

PM

TRK

 

 

 

 

 

MUX

Speech Path

 

TRK

 

 

 

 

 

 

 

 

 

MDF

 

 

COT/TLT

 

 

Control Signal

 

TRK

LT Cable

 

PM

 

 

 

 

 

Note

Speech Path

 

TRK

LT Cable

CFT

 

 

 

 

 

 

 

 

 

COT/TLT

Network

 

 

 

 

 

Control Signal

 

TRK

LT Cable

 

PM

 

 

 

 

 

MUX

Speech Path

 

TRK

LT Cable

 

 

 

 

 

 

 

 

ORT/SND

 

 

Control Signal

PM

TRK

 

 

 

 

 

Note

Speech Path

 

TRK

 

CFT

 

 

 

 

 

 

 

TDSW/INT

TSW

Symbols:

Control Signal

 

 

 

 

 

 

 

 

 

 

: Circuit Card

 

 

: Speech Path

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GT

 

 

 

: Control Signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TSW: PH-SW12

 

GT: PH-GT09

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MUX: PH-PC36

ISAGT: PZ-GT13

 

 

 

ISAGT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPU

Note: Eight CFTs are provided on the MUX (PH-PC36) cards.

CPR

Figure 5-2 Controlling Trunk Circuit Cards and Speech Path

NDA-24300CHAPTER 5

Page 323

Issue 1

Page 350
Image 350
NEC NDA-24300 manual Trunk Control, Controlling Trunk Circuit Cards and Speech Path