ADTRAN NetVanta 3000 Series Installation Guide Page 89

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NetVanta 3200/3300/3400 Series Appendix A. Connector Pin Definitions
61200860L1-34AB Copyright © 2012 ADTRAN, Inc. 91
Dial Backup Interface Module Pinouts (DBU Connector)
An optional DIM is required for dial backup applications.
Table A-15. Analog Modem and ISDN BRI DBU Connector Pinouts
Pin Name Description
1-3 Unused
4 R Network–Ring
5T NetworkTip
6-8 Unused
Table A-16. ISDN S/T DBU Connector Pinouts
Pin Name Description
1, 2 Unused
3 R1 Network Receive–Ring 1
4 R Network Transmit–Ring
5 T Network Transmit–Tip
6 T1 Network Transmit–Tip 1
7, 8 Unused
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