NPE

ON-BOARD

MICRO-

PROCESSOR

PORT

I/O

CIRCUIT

GROUND

DETECTOR

PORT

CIRCUIT

0

PORT

CIRCUIT

3

\

T.O

R.O

T1.0

R1.O

E.O

M.0

 

 

TO

T.3

 

TIE

R.3

 

TRUNKS

 

 

T1.3

 

 

R1.3

 

 

E.3

 

 

M.3

 

 

 

 

 

/

Figure 3-16. Unique Tie Trunk (TN760B) Circuitry

UNPROT .

0 0 0 0

0 0 0 0

PORT: 4 3 2 1

PROT .

SMPLX

SMPLX

SMPLX

 

SMPLX

 

 

PORT 4

 

 

PORT 3

 

 

 

PORT 2

 

 

PORT 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E&M

E&M

E&M

 

 

E&M

/

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

3-33

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Image 317
AT&T AT&T manual Unique Tie Trunk TN760B Circuitry