Installation guide

Appendix A. Connector Pin Definitions NetVanta 1335 Series Hardware Installation Guide

Dial Backup Interface Module Pinouts (DBU Connector)

An optional DIM is required for dial backup applications.

Table A-12. Analog Modem and ISDN BRI DBU Connector Pinouts

Pin Name Description

1-3 — Unused

4 R Network–Ring

5 T Network–Tip

6-8 — Unused

Table A-13. 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