DataTalker Owner’s Manual

RJ-48 Cable for Internal DSU

Receive {

Transmit {

RT RR

RT RR

1 2 3 4 5 6 7 8

RJ-48 Cable for Internal ISDN Terminal Adapter

T

R

1 2 3 4 5 6 7 8

Back to Back Mux Cable

DB-25 FEMALE

CONNECTOR

Frame Ground

 

 

1

 

Transmit Data

2

 

Receive Data

3

 

Request To Send

4

 

Clear To Send

5

 

Signal Ground

7

 

Data Set Ready

6

 

 

Carrier Detect

8

 

 

Transmit Clock

15

 

 

Receive Clock

17

 

 

Data Terminal Ready

20

 

Internal Clock

24

 

 

 

 

 

DTE

DB-25 FEMALE

CONNECTOR

1Frame Ground (AA)

3Receive Data (BB)

2Transmit Data (BA)

5Clear To Send (CB)

4Request To Send (CA)

7Signal Ground (AB)

20Data Terminal Ready (CD)

24Internal Clock

6Data Set Ready

8Carrier Detect

15Transmit Clock

17Receive Clcok

DTE

This cable is used to connect two DataTalkers back to back. The cable is asymmetrical and allows one of the DataTalkers to provide clocking to the TxC and RxC pins of the other DataTalker. Make sure the composite link configurations of the DataTalkers have one of them set for an internal clock and the other for an external clock.

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