AT&T Telephone DS1/DMi/ISDN-PRI Manual de usuario descargar pdf (Pagina 318)

100

101

B-14

SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS

To fix these problems and establish compatibility across several products, new cable groups were

developed. These cable groups specify a standard set of pin assignments for four different connector

types. The connector and connection types are the:

●

25-pair flat ribbon connector (manufactured by Amphenol Products)

15-pin D-type connector

Wire-lugs for screw terminal connections

8-pin modular jack

Table B-1, 50-Pin (25-Pair) Connector Configurations, shows the 25-pair connector pin assignments.

Table B-2, System 75 Versus System 85 Cable Comparisons, shows the various types of permitted

cables.

TABLE B-1. 50-Pin (25-Pair) Connector Configurations

(INITIAL) SYSTEM 85 DS1 OR DMI

PINOUT FOR 50-PIN CONNECTOR

PIN NUMBERS FUNCTION

1 26

RECEIVE

TRANSMIT

6 31

LOOPBACK

OTHERS NOT USED

(PDS COMPATIBLE) SYSTEM 75/85

PINOUT FOR 50-PIN CONNECTOR

PIN NUMBERS

FUNCTION

22 47

RECEIVE

23 48

TRANSMIT

24 49

LOOPBACK

OTHERS NOT USED

1 2 ... 313 314 315 316 317 318 319 320 321 322 323 ... 395 396

Comentarios a estos manuales

Sin comentarios

AT&T Telephone DS1/DMi/ISDN-PRI Manual de usuario Pagina 318

Comentarios a estos manuales