LIST OF FIGURES

 

Figure

3-1.

System

25

Digital

Switch

3-1

Figure

3-2.

Call

Processor

(ZTN82

or ZTN128) Circuitry

3-3

Figure

3-3.

Memory

(ZTN81

or

 

ZTN127)

Circuitry

3-5

Figure 3-4. TDM Bus Time Slot Generation (Not A Timing Diagram)

3-6

Figure

3-5.

TDM

Bus

Diagram

 

-

Three Cabinet System

3-9

Figure

3-6. Equipment

Connected

 

to

System 25 Via the Call Processor and Port

 

 

 

Circuit

Packs

(Sheet

 

l

of

3)

3-11

Figure

3-7.

Port

Circuit

Pack

Common

Circuitry

3-15

Figure

3-8.

Unique

Ground

Start

Trunk

(ZTN76) Circuitry

3-17

Figure

3-9.

Unique

Loop

Start

Trunk

(ZTN77) Circuitry

3-19

Figure

3-10.

Unique

Tip

Ring

Line

 

(ZTN78) Circuitry

3-20

Figure

3-11.

Unique

ATL

Line

(ZTN79) Circuitry

3-23

Figure

3-12.

Unique

Data

Line

(TN726) Circuitry

3-25

Figure

3-13.

Unique

MET

 

Line

 

(TN735) Circuitry

3-27

Figure

3-14.

Unique

Analog

Line

(TN742)

Circuitry

3-28

Figure

3-15.

Unique

DID

Trunk

 

(TN753) Circuitry

3-31

Figure

3-16.

Unique

Tie

Trunk

 

(TN760B) Circuitry

3-33

Figure 3-17. Tie Trunk (TN760B) Circuit Pack Option Switches

3-33

Figure

3-18.

Unique

Auxiliary

Trunk

(TN763) Circuitry

3-36

Figure

3-19.

Service

Circuit

(ZTN85)

3-40

Figure

3-20.

Tone

Detector

(TN748)

 

Circuit

3-42

Figure

3-21.

Pooled

Modem (TN758) Circuit

3-43

Figure

3-22.

System

Software

Partitioning

3-48

- i i -

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Image 283
AT&T AT&T manual Tdm, Atl, Met