AT&T Telephone DS1/DMi/ISDN-PRI Manual do Utilizador descarregar pdf (Página 320)

100

101

B-16

SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS

Table B-3, 15-Pin Connector Arrangement (System 75/85 Perspective), shows the 15-pin connector

arrangement.

TABLE B-3. 15-Pin Connector Arrangement (System 75/85 Perspective)

DS1 OR DMI PINOUT FOR

15-PIN CONNECTOR

PIN NUMBERS

COLOR

FUNCTION

TRANSMIT

W/BR

3 11

RECEIVE

W/GR

5/6

SL-?

LOOPBACK

W/SL

OTHERS NOT USED

The loopback (remote test) leads are normally open (NO) between pins 5 and 13, and normally

closed (NC) between pins 6 and 13. There are two types of 8-pin modular jacks. The RJ48X

contains a shorting bar that is disconnected when the jack is inserted into the plug. The RJ48C jack

is identical to the RJ48X except for the shorting bar. This interface has been accepted as the ISDN

basic access connector and is now being recommended as an optional ISDN-PRI connector. Table

B-4, 8-Position Modular Jack Pin Assignments (System 75 and System 85 Perspective), shows the

8-position connector pin assignments.

1 2 ... 315 316 317 318 319 320 321 322 323 324 325 ... 395 396

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AT&T Telephone DS1/DMi/ISDN-PRI Manual do Utilizador Página 320

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