AT&T Telephone DS1/DMi/ISDN-PRI Uživatelský manuál stáhnout pdf (Strana 319)

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SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS

B-15

TABLE B-2. System 75 Versus System 85 Cable Comparisons

CABLE/CONNECTORS

(INITIAL OR OLD)

(PDS COMPATIBLE)

(NOTE 1) SYSTEM 85

(NOTE 2) SYSTEM 85

(NOTE 2) SYSTEM 75

INTRACABINET GR 335-337

GR 367-369 (NOTE 3)

N/A

50- TO 15-PIN GR 117

GR 180 OR GR 380

C6C

50 TO WIRE-LUGS GR 357

GR 370 OR GR 380 C6D

50- TO 50-PIN

GR 135 GR 181 OR GR 380

C6F (NOTE 4)

NOTES:

These are special purpose shielded cables. Cable specifications for 50- to 80-pin cables do not currently exist.

All System 85 DS1/DMI cables are from ED-1E433; specify required length. Certain restrictions apply

regarding use of (or connecting) the old cable groups with the new cable groups. These restrictions apply

because old cable groups use different cable pairs than the new cable groups. (Refer to table B-1.)

The groups 367, 368, and 369 carrier backplane to cabinet I/O field cables will not change when the group 380

cable is used. The group 380 25-pair Amphenol connector, which mates to the port cabinet, contains jumpers

from pins 1 to 22, 4 to 23, 5 to 48, and 26 to 47. Therefore, transmit and receive leads for both CR 335-337

and GR 367-369 are tied together and the GR 380 cable will work regardless of the interconnect cable used.

System 75 has a 50-to 50-pin extension cable (C6E) which is available in 100-foot lengths.

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AT&T Telephone DS1/DMi/ISDN-PRI Uživatelský manuál Strana 319

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