Adtran 1202872L1 User Manual
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
5
T
Network–Tip
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